|
Digital Camera Patent Abstract
A digital camera comprising: an imaging unit operable to generate
an image by photographing an object; a receiving unit operable to
receive information relating to image processing from one or more
transmission devices; a judging unit operable to judge whether the
image is to be output or not, based on the information received
by the receiving unit; and an output unit operable to, in accordance
with the judgment made by the judging unit, output the image to
a memory, or discard the image, where the memory is readable by
the digital camera or an external device.
Digital Camera Patent Claims
1. A digital camera comprising: an imaging unit operable to generate
an image by photographing an object; a receiving unit operable to
receive information relating to image processing from one or more
transmission devices;. a judging unit operable to judge whether
the image is to be output or not, based on the information received
by the receiving unit; and an output unit operable to, in accordance
with the judgment made by the judging unit, output the image to
a memory, or discard the image, the memory being readable by the
digital camera or an external device.
2. The digital camera of claim 1, wherein the judging unit further
judges whether the image is to be processed or not, and the output
unit outputs the image to the memory without processing, or processes
and outputs the image to the memory, in accordance with the judgment
made by the judging unit.
3. The digital camera of claim 2, wherein the receiving unit includes:
a first receiving unit operable to receive first information from
a first transmission device; and a second receiving unit operable
to receive second information indicating image modification corresponding
to the object from a second transmission device, the judging unit
makes the judgment based on the first information, and if the judging
unit judges that the image is to be processed and output, the output
unit performs the image modification indicated by the second information
on the image, and outputs the modified image to the memory.
4. The digital camera of claim 3, wherein the output unit performs
the image modification to make the image visually distinguishable.
5. The digital camera of claim 4, wherein when the second receiving
unit receives the second information, the judging unit examines
whether the first receiving unit has received the first information,
and if the first receiving unit has received the first information,
the judging unit judges that the image is to be processed and output.
6. The digital camera of claim 4, wherein the first information
includes information indicating image modification, when the second
receiving unit receives the second information, the judging unit
examines whether the first receiving unit has received the first
information, if the first receiving unit has received the first
information, the judging unit judges that the image is to be processed
and output, and the output unit performs the image modification
indicated by the first information on the image, in addition to
the image modification indicated by the second information.
7. The digital camera of claim 3, wherein when the second receiving
unit receives the second information, the judging unit examines
whether the first receiving unit has received the first information,
if the first receiving unit has received the first information,
the judging unit judges that the image is to be output without being
processed.
8. The digital camera of claim 3, wherein when the second receiving
unit receives the second information, the judging unit examines
whether the first receiving unit has received the first information,
if the first receiving unit has received the first information,
the judging unit judges that the image is not to be output.
9. The digital camera of claim 3, wherein the first transmission
device is a gate which prestores the first information, and through
which a user carrying the digital camera passes, and the second
transmission device is an IC tag which prestores the second information,
and which is attached to, hung around, or provided near the object.
10. The digital camera of claim 9, further comprising: a driving
unit operable to, when detecting that a shutter release button included
in the digital camera is pressed down, cause the imaging unit and
the second receiving unit to operate concurrently.
11. The digital camera of claim 10, wherein the digital camera
has a function as a mobile telephone for performing radio communication.
12. The digital camera of claim 2, wherein the transmission device
is an IC tag that is attached to, hung around, or provided near
the object, and that prestores the information which indicates image
processing corresponding to the object, the judging unit judges
that the image is to be subjected to the image processing indicated
by the information, and then to be output, and the output unit subjects
the image to the image processing, and outputs the processed image
to the memory.
13. The digital camera of claim 12, further comprising: a driving
unit operable to, when detecting that a shutter release button included
in the digital camera is pressed down, cause the imaging unit and
the receiving unit to operate concurrently.
14. The digital camera of claim 13, wherein the output unit executes
an image processing program corresponding to the image processing
to make the image visually distinguishable.
15. The digital camera of claim 13, wherein the receiving unit
receives the information which is character data showing an explanation
about the object, the judging unit judges that the image is to be
subjected to the image processing which indicates addition of the
character data to the image, and then output, and the output unit
subjects the image to the image processing which indicates the addition
of the character data to the image, and outputs the processed image
to the memory.
16. The digital camera of claim 13, wherein the receiving unit
receives the information which is copyright information indicating
a limitation on copying of the image, the judging unit judges that
the image is to be subjected to the image processing which indicates
addition of the copyright information to the image, and then output,
and the output unit subjects the image to the image processing which
indicates the addition of the copyright information to the image,
and outputs the processed image to the memory.
17. The digital camera of claim 13, wherein the receiving unit
receives the information which is a computer program to perform
predetermined image modification, the judging unit judges that the
image is to be subjected to the image processing which indicates
(i) execution of the computer program to perform the predetermined
image modification on the image, or (ii) addition of the computer
program to the image, and then output, and the output unit subjects
the image to the image processing which indicates the predetermined
image modification, or the addition of the computer program to the
image, and outputs the processed image to the memory.
18. A memory card attached to a digital camera that generates image
data by photographing an object, the memory card storing the image
data, comprising: an image receiving unit operable to receive an
image generated by the digital camera; a receiving unit operable
to receive information relating to image processing from one or
more transmission devices; a judging unit operable to, based on
the information received by the receiving unit, judge whether the
image is to be output without being processed, the image is to be
processed and output, or the image is not to be output; an output
unit operable to, in accordance with the judgment made by the judging
unit, output the image without processing, process and output the
image, or discard the image; and a storing unit operable to store
the image output from the output unit.
19. A digital camera system including a digital camera that photographs
an object, and a first transmission device that is attached to,
hung around, or provided near the object, the digital camera comprising:
an imaging unit operable to generate an image by photographing the
object; a receiving unit operable to receive first information relating
to image processing corresponding to the object, from the first
transmission device; a judging unit operable to, based on the first
information, judge whether the image is to be output without being
processed, the image is to be processed and output, or the image
is not to be output; and an output unit operable to, in accordance
with the judgment made by the judging unit, output the image to
a memory without processing, processes and outputs the image to
the memory, or discards the image, the memory being readable by
the digital camera or an external device, and the first transmission
device comprising: a first storing unit prestoring the first information;
and a first transmission unit operable to transmit the first information
to the digital camera.
20. The digital camera system of claim 19, further including a
second transmission device, the second transmission device comprising:
a second storing unit prestoring second information relating to
image modification; and a second transmission unit operable to transmit
the second information to the digital camera, wherein the receiving
unit further receives the second information from the second transmission
device, when a user carrying the digital camera passes through the
second transmission device, and when the judging unit judges that
the image is to be processed and output, the output unit performs
the image modification indicated by the second information on the
image, in addition to the image processing indicated by the first
information, and then outputs the modified image to the memory.
21. The digital camera system of claim 20, wherein the digital
camera has a function as a mobile telephone for performing radio
communication.
22. The digital camera system of claim 21, further including a
terminal that generates a warning sound, the terminal being provided
near the object, wherein the digital camera sends a signal to the
terminal, concurrently with the generation of the image by the imaging
unit, and the terminal comprises: a signal receiving unit operable
to receive the signal from the digital camera; and a sound generating
unit operable to generate a warning sound, when the signal receiving
unit receives the signal.
23. A control method for use in a digital camera, comprising steps
of: generating an image by photographing an object; receiving information
relating to image processing from one or more transmission devices;
judging whether the image is to be output or not, based on the information
received in the receiving step; and outputting the image to a memory,
or discarding the image, in accordance with the judgment made in
the judging step, the memory being readable by the digital camera
or an external device.
24. A control program for use in a digital camera, comprising steps
of: generating an image by photographing an object; receiving information
relating to image processing from one or more transmission devices;
judging whether the image is to be output or not, based on the information
received in the receiving step; and outputting the image to a memory,
or discarding the image, in accordance with the judgment made in
the judging step, the memory being readable by the digital camera
or an external device.
25. A computer-readable storage medium storing a control program
for use in a digital camera, the control program comprising steps
of: generating an image by photographing an object; receiving information
relating to image processing from one or more transmission devices;
judging whether the image is to be output or not, based on the information
received in the receiving step; and outputting the image to a memory,
or discarding the image, in accordance with the judgment made in
the judging step, the memory being readable by the digital camera
or an external device.
Digital Camera Patent Description
TECHNICAL FIELD
[0001] The present invention relates to a digital camera that generates
image data by photographing an object, especially to a technique
to perform image processing on image data generated by the digital
camera.
BACKGROUND ART
[0002] In recent years, digital cameras and camera-equipped mobile
telephones have rapidly become common.
[0003] Atypical digital camera has a function of adding extra information
such as a date and a time at which an image is taken, a condition
under which the image is taken, and a place at which the image is
taken, to the image according to a user's input, and a function
of performing image processing on the image according to a user's
input designating a compression format, a compression rate or the
like.
[0004] Here, since digital cameras and camera-equipped mobile telephones
are compact, it is difficult to completely prevent photographing
an object using digital cameras and camera-equipped mobile telephones
at a place such as a museum, where photography is prohibited. Furthermore,
"digital shoplifting" at a bookshop has recently emerged
as a problem. Here, digital shoplifting means a conduct of photographing,
for example, an article in a magazine at a bookshop without purchasing
the magazine, using a digital camera or camera-equipped mobile telephone.
Japanese patent application publication No. 2001-320702 (a patent
document 1) discloses a technique to prevent photographing by means
of a digital camera or camera-equipped mobile telephone at a place
where photography is prohibited and digital shoplifting, using the
above-mentioned functions.
[0005] The patent document 1 discloses that a tag which has a blinking
infrared light emitting diode (LED) is attached to an object. When
a user photographs the object using a digital camera, the digital
camera reads a blinking pattern of the infrared LED. Then, the digital
camera adds extra information shown by the blinking pattern to an
image of the object, or subjects the image to image processing shown
by the blinking pattern.
[0006] According to this technique, however, the digital camera
is required to capture and store a moving image, even when the user
desires only a still image, since the digital camera needs to read
the blinking pattern of the infrared LED. Therefore, the digital
camera needs to be equipped with a memory with a capacity large
enough to be able to store a moving image.
[0007] Furthermore, the user can intentionally make the blinking
pattern unreadable from the digital camera, by covering the tag
with something or photographing the object from a particular angle.
If such is the case, the digital camera does not read the blinking
pattern, and therefore does not perform image processing, even if
required.
DISCLOSURE OF THE INVENTION
[0008] In light of the above problems, an object of the present
invention is to provide a digital camera system which performs image
processing on an image obtained by a digital camera in accordance
with acquired information relating to image processing, without
a need of obtaining and storing a moving image, and regardless of
a user's intention.
[0009] The object can be achieved by a digital camera comprising:
an imaging unit operable to generate an image by photographing an
object; a receiving unit operable to receive information relating
to image processing from one or more transmission devices; a judging
unit operable to judge whether the image is to be output or not,
based on the information received by the receiving unit; and an
output unit operable to, in accordance with the judgment made by
the judging unit, output the image to a memory, or discard the image,
the memory being readable by the digital camera or an external device.
[0010] Here, the judging unit may further judge whether the image
is to be processed or not, and the output unit may output the image
to the memory without processing, or processes and outputs the image
to the memory, in accordance with the judgment made by the judging
unit.
[0011] According to this construction, the digital camera determines
how to treat the image obtained by photographing the object. If
the digital camera judges that the image should be subjected to
image processing before being output, the digital camera can perform
image processing on the image regardless of a user's intention.
[0012] Here, the receiving unit may include: a first receiving
unit operable to receive first information from a first transmission
device; and a second receiving unit operable to receive second information
indicating image modification corresponding to the object from a
second transmission device. Here, the judging unit may make the
judgment based on the first information, and if the judging unit
judges that the image is to be processed and output, the output
unit may perform the image modification indicated by the second
information on the image, and outputs the modified image to the
memory.
[0013] According to this construction, the first information is
used to judge whether image processing should be performed on the
image, or whether the image should be discarded. On the other hand,
the second information indicates what kind of image processing should
be performed. In this way, combinations of the first information
and the second information can realize various systems.
[0014] Here, the output unit may perform the image modification
to make the image visually distinguishable.
[0015] According to this construction, the digital camera performs
image processing on the image, to make the image visually distinguishable.
In this way, even if the digital camera is used to photograph an
object despite of prohibition, the digital camera can perform an
image-blurring operation on an image of the object, thereby making
it difficult to recognize the object in the image. This technique
can be utilized to protect a copyright and a right of publicity.
[0016] Here, when the second receiving unit receives the second
information, the judging unit may examine whether the first receiving
unit has received the first information, and if the first receiving
unit has received the first information, the judging unit may judge
that the image is to be processed and output.
[0017] According to this construction, the digital camera can judge
whether to perform image processing on the image, depending on whether
having received the first information or not.
[0018] The first transmission device is, for example, provided
at an entrance of a bookshop. When a user carrying the digital camera
enters the bookshop, the digital camera receives the first information
regardless of the user's intention. Here, the second transmission
device may be attached to a book, a magazine and the like in the
bookshop. If the user utilizes the digital camera to photograph
a book or the like, the digital camera receives the second information
regardless of the user's intention. The digital camera then performs
image processing on an image obtained by the photographing. Thus,
"digital shoplifting" can be prevented.
[0019] Here, the first information may include information indicating
image modification. Furthermore, when the second receiving unit
receives the second information, the judging unit may examine whether
the first receiving unit has received the first information. Here,
if the first receiving unit has received the first information,
the judging unit may judge that the image is to be processed and
output, and the output unit may perform the image modification indicated
by the first information on the image, in addition to the image
modification indicated by the second information.
[0020] According to this construction, the digital camera subjects
the image not only to the image processing based on the second information,
but also to the image processing based on the first information.
Thus, more complicated image processing can be performed on the
image.
[0021] Here, when the second receiving unit receives the second
information, the judging unit may examine whether the first receiving
unit has received the first information. Here, if the first receiving
unit has received the first information, the judging unit may judge
that the image is to be output without being processed.
[0022] According to this construction, the digital camera may be
configured to receive the first information from the first transmission
device, if the user makes a necessary payment. After this, the digital
camera may be used to photograph the object, and then receive the
second information indicating an image-blurring operation from the
second transmission device.
[0023] In this way, the digital camera can be controlled not to
perform an image-blurring operation on the image. In other words,
the digital camera can be utilized for a system to purchase a right
to perform photographing.
[0024] Here, when the second receiving unit receives the second
information, the judging unit may examine whether the first receiving
unit has received the first information. Here, if the first receiving
unit has received the first information, the judging unit may judge
that the image is not to be output.
[0025] According to this construction, if the first transmission
device is provided at a place where photographing is prohibited,
the image can be discarded. This can prevent photographing at a
place where photography is prohibited.
[0026] Here, the first transmission device may be a gate which
prestores the first information, and through which a user carrying
the digital camera passes, and the second transmission device may
be an IC tag which prestores the second information, and which is
attached to, hung around, or provided near the object.
[0027] According to this construction, the IC tag is such a small
computer system that the IC tag can be attached to, hung around,
or provided near the object without hindering photographing of the
object. Here, the user passes through the first transmission device
which is a gate. If the gate is provided at an entrance and an exit
of a specific region, the digital camera can perform image processing
on an image obtained by photographing within the specific region.
[0028] Here, the digital camera may further comprise: a driving
unit operable to, when detecting that a shutter release button included
in the digital camera is pressed down, cause the imaging unit and
the second receiving unit to operate concurrently.
[0029] According to this construction, when the user presses down
the shutter release button of the digital camera to photograph the
object, the digital camera can obtain information relating to image
processing from the IC tag, concurrently with photographing the
object. Thus, the digital camera can subject the image to corresponding
image processing.
[0030] Here, the digital camera may have a function as a mobile
telephone for performing radio communication.
[0031] According to this construction, the digital camera is a
so-called camera-equipped mobile telephone. Since a camera-equipped
mobile telephone is smaller than the digital camera, it is generally
more difficult to prevent photographing with use of a camera-equipped
mobile telephone in a place where photographing is prohibited. According
to the present invention, however, the camera-equipped mobile telephone
receives information relating to image processing from a transmission
device, and can perform the image processing, without a need of
storing a moving image, and regardless of the user's intention.
[0032] Here, the transmission device may be an IC tag that is attached
to, hung around, or provided near the object, and that prestores
the information which indicates image processing corresponding to
the object, the judging unit may judge that the image is to be subjected
to the image processing indicated by the information, and then to
be output, and the output unit may subject the image to the image
processing, and outputs the processed image to the memory.
[0033] According to this construction, the IC tag prestores the
information relating to image processing corresponding to the object.
Thus, the digital camera can perform corresponding image processing
on the object, if the digital camera judges that image processing
should be performed. The IC tag is so minute that the IC tag can
be attached to, hung around, or provided near the object without
hindering photographing of the object.
[0034] Here, the digital camera may further comprise: a driving
unit operable to, when detecting that a shutter release button included
in the digital camera is pressed down, cause the imaging unit and
the receiving unit to operate concurrently.
[0035] According to this construction, when the user presses down
the shutter release button of the digital camera to photograph the
object, the digital camera can obtain information relating to image
processing from the IC tag, concurrently with photographing the
object. Thus, the digital camera can subject the image to corresponding
image processing.
[0036] Here, the output unit may execute an image processing program
corresponding to the image processing to make the image visually
distinguishable.
[0037] According to this construction, the digital camera receives
the information relating to the image processing, so as to perform
an image-blurring operation or tone conversion on the image, or
to modify the number of pixels of the image. In this way, the digital
camera can perform image processing regardless of the user's intention.
For example, the digital camera can perform an image-blurring operation
or the like on an image obtained by inappropriate photographing
at a place such as a museum, in order to protect a copyright.
[0038] Here, the receiving unit may receive the information which
is character data showing an explanation about the object, the judging
unit may judge that the image is to be subjected to the image processing
which indicates addition of the character data to the image, and
then output, and the output unit may subject the image to the image
processing which indicates the addition of the character data to
the image, and outputs the processed image to the memory.
[0039] According to this construction, an IC tag storing product
information may be attached to each product at a shop, for example.
Thus, the digital camera can obtain product information, as well
as an image, by photographing each product. This can save the user
efforts of investigating and inquiring product information, and
may enhance the user's willingness to buy.
[0040] Here, the receiving unit may receive the information which
is copyright information indicating a limitation on copying of the
image, the judging unit may judge that the image is to be subjected
to the image processing which indicates addition of the copyright
information to the image, and then output, and the output unit may
subject the image to the image processing which indicates the addition
of the copyright information to the image, and outputs the processed
image to the memory.
[0041] According to this construction, the image obtained using
the digital camera can be prevented from being copied with no restriction.
[0042] Here, the receiving unit may receive the information which
is a computer program to perform predetermined image modification,
the judging unit may judge that the image is to be subjected to
the image processing which indicates (i) execution of the computer
program to perform the predetermined image modification on the image,
or (ii) addition of the computer program to the image, and then
output, and the output unit may subject the image to the image processing
which indicates the predetermined image modification, or the addition
of the computer program to the image, and outputs the processed
image to the memory.
[0043] According to this construction, the digital camera can perform
various types of image processing on the image in accordance with
the program received from the IC tag, regardless of the user's intention.
Alternatively, the digital camera may add the program to the image.
In this way, various types of image processing can be performed
on the image in accordance with the program, even when the image
is displayed using a predetermined application program.
BRIEF DESCRIPTION OF THE DRAWINGS
[0044] FIG. 1 illustrates constituents of a digital camera system
10.
[0045] FIG. 2 is a functional block diagram illustrating a construction
of a digital camera 100.
[0046] FIG. 3A illustrates mode information that is stored in a
mode storage unit 104 of the digital camera 100 after a user with
the digital camera 100 has passed through a gate 200.
[0047] FIG. 3B illustrates mode information that is stored in the
mode storage unit 104 of the digital camera 100 before the user
with the digital camera 100 passes through the gate 200, or when
the user with the digital camera 100 has passed through a gate 700.
[0048] FIG. 3C illustrates a selection screen 118 displayed on
a display unit 108 of the digital camera 100, when the mode storage
unit 104 stores mode information indicating a fixed mode/100 megapixels.
[0049] FIG. 4A illustrates image data 120 that is generated by
subjecting an image of an object A to image processing in accordance
with image processing information received from an IC tag 300.
[0050] FIG. 4B illustrates image data 130 that is generated by
subjecting an image of an object B to image processing in accordance
with image processing information received from an IC tag 400.
[0051] FIG. 4C illustrates image data 140 that is generated by
subjecting an image of an object C to image processing in accordance
with image processing information received from an IC tag 500.
[0052] FIG. 5 is a functional block diagram illustrating a construction
of the gate 200.
[0053] FIG. 6 is a functional block diagram illustrating a construction
of the IC tag 300.
[0054] FIG. 7 is a flow chart illustrating an operation of the
digital camera system 10.
[0055] FIG. 8 is a flow chart illustrating image processing by
the digital camera 100.
[0056] FIG. 9 illustrates constituents of a digital camera system
20.
[0057] FIG. 10 is a functional block diagram illustrating a construction
of a digital camera 100a.
[0058] FIG. 11 is a flow chart illustrating an operation of the
digital camera system 20, and the flow chart continues in FIG. 12.
[0059] FIG. 12 is a flow chart illustrating the operation of the
digital camera system 20.
[0060] FIG. 13 is a flow chart illustrating image processing by
the digital camera 100a.
[0061] FIG. 14 is a functional block diagram illustrating a construction
of a digital camera 100b.
[0062] FIG. 15 is a flow chart illustrating an operation of a system
including the digital camera 100b, and the flow chart continues
in FIG. 16.
[0063] FIG. 16 is a flow chart illustrating the operation of the
system including the digital camera 100b.
[0064] FIG. 17 is a flow chart illustrating image processing by
the digital camera 100b.
BEST MODE FOR CARRYING OUT THE INVENTION
[0065] The following describes a digital camera system 10 which
is an embodiment of the present invention, with reference to the
attached figures.
(Overview)
[0066] FIG. 1 illustrates a construction of the digital camera
system 10.
[0067] The digital camera system 10 includes a digital camera 100,
a gate 200, an IC tag 300, an IC tag 400, an IC tag 500, a memory
card 600 (not shown in FIG. 1), and a gate 700.
[0068] The digital camera 100 belongs to and used by a user. The
gate 200 is provided at an entrance of an exhibition hall, as an
example. The user carrying the digital camera 100 passes through
the gate 200 to enter the exhibition hall.
[0069] An object A is a plasma television displayed at the exhibition
hall. The IC tag 300 is attached to the plasma television. An object
B is a pet robot displayed at the exhibition hall. The IC tag 400
is hung around a neck of the pet robot. An object C is a mobile
telephone displayed at the exhibition hall. The IC tag 500 is provided
near the mobile telephone.
[0070] The user photographs the objects A, B and C using the digital
camera 100. The memory card 600 is a card-like memory for storing
images, and is inserted in a memory card slot in the digital camera
100. The gate 700 is provided at an exit of the exhibition hall.
The user carrying the digital camera 100 passes through the gate
700 to leave the exhibition hall.
(Construction)
[0071] The following part describes constituents of the digital
camera system 10. [0072] 1. Digital Cameral 100
[0073] FIG. 2 is a functional block diagram illustrating a 15 construction
of the digital camera 100. As shown in FIG. 2, the digital camera
100 is constituted by an imaging unit 101, an analog front end 102,
a communication unit 103, a mode storage unit 104, an image processing
unit 105, a driving unit 106, a control unit 107, a display unit
108, an operation unit 109, and a memory card access unit 110.
[0074] The digital camera 100 physically includes a lens, various
buttons such as a shutter release button, a microprocessor, a ROM,
a RAM, a display, the memory card slot for the memory card 600,
and the like. [0075] (1) Imaging Unit 101
[0076] The imaging unit 101 includes the lens and an imaging element.
[0077] The imaging element is formed in such a manner that a plurality
of photoelectric converters are provided on a semiconductor substrate
in a two-dimensional matrix. Each photoelectric converter has a
color filter of one of a plurality of colors on its light-receiving
surface. Each photoelectric converter converts an amount of light
received through the lens from an object during a time period specified
by a driving signal sent from the driving unit 10 6, into an electric
charge. In the present embodiment, the number of the photoelectric
converters corresponds to three million pixels.
[0078] The imaging element reads an electric charge generated by
each photoelectric converter, and sends an image signal corresponding
to the read electric charge to the analog front end 102. Alternatively,
the imaging element may add electric charges together, to obtain
a resulting electric charge, which are read from photoelectric converters
having color filters of the same color in each portion of L rows
and C columns (6.ltoreq.L, 6.ltoreq.C, and L and C are even natural
numbers) Here, the portion is formed by partitioning the matrix
of the photoelectric converters. In this case, the imaging element
reads the resulting electric charge for each portion, and sends
an image signal corresponding to the resulting electric charge to
the analog front end 102. [0079] (2) Analog Front End 102
[0080] The analog front end 102 performs the correlated double
sampling (CDS) and the auto gain control (AGC) on the image signal
received from the imaging unit 101, and then converts the image
signal into a digital image signal. The analog front end 102 sends
the digital image signal to the image processing unit 105. [0081]
(3) Communication Unit 103
[0082] The communication unit 103 includes an antenna. The communication
unit 103 communicates with the gates 200 and 700, and the IC tags
300, 400 and 500.
[0083] Specifically speaking, the communication unit 103 receives
mode information transmitted from the gate 200, and sends the received
mode information to the mode storage unit 104. Similarly, the communication
unit 103 receives mode information transmitted from the gate 700,
and sends the received mode information to the mode storage unit
104. The mode information is described later.
[0084] Also, the communication unit 103 transmits/receives a radio
wave to/from the IC tag 300 attached to the object A, concurrently
with photographing of the object A performed by the imaging unit
101. In more detail, during a time period specified by a driving
signal sent from the driving unit 106, the communication unit 103
transmits a radio wave to the IC tag 300, and then receives a radio
wave from the IC tag 300. The communication unit 103 extracts image
processing information from the radio wave received from the IC
tag 300, and sends the extracted image processing information to
the image processing unit 105.
[0085] In the same manner, the communication unit 103 transmits/receives
a radio wave to/from the IC tag 400 hung around the object B, concurrently
with photographing of the object B performed by the imaging unit
101. The communication unit 103 extracts image processing information
from a radio wave received from the IC tag 400, and sends the extracted
image processing information to the image processing unit 105.
[0086] In the same manner, the communication unit 103 transmits/receives
a radio wave to/from the IC tag 500 provided near the object C,
concurrently with photographing of the object C performed by the
imaging unit 101. The communication unit 103 extracts image processing
information from a radio wave received from the IC tag 500, and
sends the extracted image processing information to the image processing
unit 105. Here, image processing information can indicate a plurality
of kinds of image processing, one of which is image modification.
In the present invention, image modification indicates a process
to make an image visually distinguishable. [0087] (4) Mode Storage
Unit 104
[0088] The mode storage unit 104 stores mode information. Here,
mode information is related to the number of pixels, and specifically
speaking, indicates one of a selection mode and a fixed mode/100
megapixels.
[0089] When the mode information stored in the mode storage unit
104 indicates the selection mode, the operation unit 109 receives
the user's operation selecting the number of pixels. The control
unit 107 writes image data received from the image processing unit
105 into the memory card 600 through the memory card access unit
110, according to the number of pixels selected by the user.
[0090] When the mode information indicates the fixed mode/100 megapixels,
the operation unit 109 does not accept an input of the number of
pixels selected by the user's operation. The control unit 107 writes
image data received from the image processing unit 105 into the
memory card 600 through the memory card access unit 110, according
to the predetermined 100 megapixels. In other words, when the mode
information indicates the fixed mode/100 megapixels, image data
is stored in the memory card 600 according to 100 megapixels, regardless
of the user's intention.
[0091] Under a normal condition, the mode storage unit 104 stores
mode information indicating the selection mode. When the user carrying
the digital camera 100 passes through the gate 200 to enter the
exhibition hall, the mode storage unit 104 receives mode information
indicating the fixed mode/100 megapixels from the gate 200 through
the communication unit 103. The mode storage unit 104 replaces the
stored mode information indicating the selection mode, with the
currently received mode information indicating the fixed mode/100
megapixels. Furthermore, when the user carrying the digital camera
100 passes through the gate 700 to leave the exhibition hall, the
mode storage unit 104 receives mode information indicating the selection
mode from the gate 700 through the communication unit 103. The mode
storage unit 104 replaces the stored mode information indicating
the fixed mode/100 megapixels, with the currently received mode
information indicating the selection mode.
[0092] Which is to say, the mode storage unit 104 stores mode information
indicating the fixed mode/100 megapixels as shown in FIG. 3A, when
the user with the digital camera 100 stays within the exhibition
hall limited by the gate 200 and the gate 700. The mode storage
unit 104 stores mode information indicating the selection mode as
shown in FIG. 3B, when the user with the digital camera 100 is outside
the exhibition hall.
[0093] FIG. 3C illustrates a selection screen 118 displayed on
the display unit 108, if the mode storage unit 104 stores mode information
indicating the fixed mode/100 megapixels. The selection screen 118
shows three numbers 100, 200 and 300 each indicating the number
of pixels. In FIG. 3C, 100 megapixels is selected. Furthermore,
a message saying "SELECTION NOT ALLOWED IN FIXED MODE"
is displayed at the bottom of the selection screen 118. [0094] (5)
Image Processing Unit 105
[0095] The image processing unit 105 includes a microprocessor,
a ROM, a RAM, and the like. The image processing unit 105 receives
a digital image signal from the analog front end 102, and image
processing information from the communication unit 103. The image
processing unit 105 performs image processing on the digital image
signal in accordance with the received image processing information,
to generate image data. This operation is described in the following
in detail.
[0096] The image processing unit 105 receives a digital image signal
121 (shown in FIG. 4A) corresponding to the object A from the analog
front end 102, and image processing information 122 (shown in FIG.
4A) corresponding to the object A from the communication unit 103.
The image processing information 122, which is transmitted from
the IC tag 300 attached to the object A, is character data showing
an explanation about the object A. The image processing unit 105
then performs image processing on the digital image signal 121,
to generate image data 120 shown in FIG. 4A. To be specific, the
image processing unit 105 adds the character data to the digital
image signal 121. Here, the addition of the character data is realized
using a user field defined by the Exchangeable image file format
(Exif), which is an image format for use in digital cameras, and
a comment segment defined by the Joint Photographic Experts Group
(JPEG) format. The image processing unit 105 sends the generated
image data 120 to the control unit 107.
[0097] Furthermore, the image processing unit 105 receives a digital
image signal 131 (shown in FIG. 4B) corresponding to the object
B from the analog front end 102, and image processing information
132 (shown in FIG. 4B) corresponding to the object B from the communication
unit 103. The image processing information 132, which is transmitted
from the IC tag 400 hung around the object B, is copyright information
about the object B. The image processing unit 105 performs image
processing on the digital image signal 131, to generate image data
130 shown in FIG. 4B. To be specific, the image processing unit
105 adds the copyright information to the digital image signal 131.
The image processing unit 105 sends the generated image data 130
to the control unit 107. Here, the addition of the copyright information
is realized using a user field defined by the Exif and a comment
segment defined by the JPEG format.
[0098] Also, the image processing unit 105 receives a digital image
signal corresponding to the object C from the analog front end 102,
and image processing information corresponding to the object C from
the communication unit 103. The image processing information, which
is transmitted from the IC tag 500 provided near the object C, is
a program to perform an image-blurring operation. The image processing
unit 105 reads and executes the program, to perform an image-blurring
operation on the digital image signal. Thus, the image processing
unit 105 generates image data 140 shown in FIG. 4C. The image processing
unit 105 sends the generated image data 140 to the control unit
107. Here, a technique to perform an image-blurring operation is
publicly known, and therefore not explained here. [0099] (6) Driving
Unit 106
[0100] The driving unit 106 generates an appropriate driving signal
according to an operation received by the operation unit 109, and
sends the generated driving signal to an appropriate constituent
of the digital camera 100.
[0101] For example, when receiving, from the control unit 107,
a control signal indicating that the shutter release button included
in the operation unit 109 is pressed down, the driving unit 106
generates a first signal and a second signal. The driving unit 106
sends the first signal to the imaging unit 101, and the second signal
to the communication unit 103. The imaging unit 101 operates in
accordance with the first signal, and the communication unit 103
operates in accordance with the second signal. This enables the
image processing unit 105 to interrelate a digital image signal
generated by photographing an object and image processing information
transmitted from an IC tag attached to, hung around, or provided
near the object. [0102] (7) Control Unit 107
[0103] The control unit 107 specifically includes a microprocessor,
a ROM, a RAM, and the like. The control unit 107 controls the digital
camera 100 in such a manner that the microprocessor executes a computer
program stored in the ROM or RAM.
[0104] The following part, as an example, describes an operation
of the control unit 107 when the shutter release button included
in the operation unit 109 is pressed down.
[0105] When receiving an operation signal indicating that the shutter
release button is pressed down from the operation unit 109, the
control unit 107 generates a control signal indicating that the
shutter button is pressed down, and sends the generated control
signal to the driving unit 106.
[0106] In response to the control signal, for example, the object
A is photographed by the driving unit 106, the imaging unit 101,
and the analog front end 102. Furthermore, the image data 120 (shown
in FIG. 4A) corresponding to the object A is generated by the driving
unit 106, the communication unit 103, and the image processing unit
105.
[0107] The control unit 107 receives the image data 120 from the
image processing unit 105. The control unit 107 reads mode information
stored in the mode storage unit 104. Here, the read mode information
indicates the fixed mode/100 megapixels as shown in FIG. 3A.
[0108] The control unit 107 performs a necessary processing on
the image data 120 received from the image processing unit 105,
so that the image data 120 has 100 megapixels. The control unit
107 writes the processed image data 120 into the memory card 600
through the memory card access unit 110.
[0109] Similarly, the control unit 107 receives the image data
130 generated based on photographing of the object B, from the image
processing unit 105. The control unit 107 performs a necessary processing
on the image data 130, so that the image data 130 has 100 megapixels.
The control unit 107 then writes the processed image data 130 into
the memory card 600 through the memory card access unit 110.
[0110] Also, the control unit 107 receives the image data 140 generated
based on photographing of the object C, from the image processing
unit 105. The control unit 107 performs a necessary processing on
the image data 140, so that the image data 140 has 100 megapixels.
The control unit 107 then writes the processed image data 140 into
the memory card 600 through the memory card access unit 110. [0111]
(8) Display Unit 108
[0112] The display unit 108 includes a display, and shows an operation
screen sent from the control unit 107 on the display. The operation
screen is, as an example, the selection screen 118 shown in FIG.
3C.
[0113] Furthermore, the display unit 108 shows the image data 120,
130 and 140 stored in the memory card 600 on the display. [0114]
(9) Operation Unit 109
[0115] The operation unit 109 includes a plurality of buttons such
as the shutter release button. When the user presses down any of
the buttons, the operation unit 109 generates an operation signal
corresponding to the pressed button, and sends the generated operation
signal to the control unit 107. [0116] (10) Memory Card Access Unit
110
[0117] The memory card access unit 110 specifically includes a
memory card slot, and the like. While the memory card 600 is inserted
into the memory card slot, the memory card access unit 110 writes
the image data 120, 130 and 140 sent from the control unit 107,
into the memory card 600. In addition, the memory card access unit
110 reads the image data 120, 130 and 140 from the memory card 600,
and sends the read image data to the display unit 108 through the
control unit 107, in order to have the display unit 108 display
the image data 120, 130 and 140 on the display. [0118] 2. Gate 200
[0119] The gate 200 is provided at the entrance of the exhibition
hall as shown in FIG. 1. The user carrying the digital camera 100
passes through the gate 200 to enter the exhibition hall. It should
be noted that a shape of the gate 200 shown in FIG. 1 only serves
as an example, and can be modified as long as the gate 200 is a
computer system including a microprocessor, a ROM, a RAM, and the
like, and constituted by a power supply unit 201, a control unit
202, a memory 203, and a communication unit 204, as shown in FIG.
5. [0120] (1) Power Supply Unit 201
[0121] The power supply unit 201 is supplied with power by an external
power source connected thereto, and supplies power to other constituents
of the gate 200. [0122] (2) Control Unit 202
[0123] The control unit 202 specifically includes a microprocessor,
a ROM, a RAM, and the like. The control unit 202 controls the gate
200 in such a manner that the microprocessor executes a computer
program stored in the ROM or RAM.
[0124] The control unit 202 is supplied with power by the power
supply unit 201. The control unit 202 reads information from the
memory 203, and sends the read information to the communication
unit 204. [0125] (3) Memory 203
[0126] The memory 203 stores mode information indicating the fixed
mode/100 megapixels. [0127] (4) Communication Unit 204
[0128] The communication unit 204 includes an antenna. The communication
unit 204 receives the mode information indicating the fixed mode/100
megapixels from the control unit 202, and transmits the received
mode information through a radio wave.
[0129] The mode information transmitted from the communication
unit 204 is received by the antenna included in the communication
unit 103 of the digital camera 100. Here, before the user with the
digital camera 100 passes through the gate 200, the digital camera
100 stores mode information indicating the selection mode. If the
user passes through the gate 200 taking the digital camera 100 with
him/her, the digital camera 100 receives the mode information indicating
the fixed mode/100 megapixels from the communication unit 204. Thus,
the digital camera 100 replaces the mode information indicating
the selection mode, with the currently received mode information
indicating the fixed mode/100 megapixels. [0130] 3. IC Tag 300
[0131] The IC tag 300 is attached to the object A as shown in FIG.
1. The IC tag 300 does not include a battery. The IC tag 300 is
a noncontact data carrier, and communicates with the digital camera
100 in the following manner. The IC tag 300 receives an activating
signal from the digital camera 100, and generates an electromotive
force by resonance.
[0132] FIG. 6 illustrates a construction of the IC tag 300.
[0133] As shown in FIG. 6, the IC tag 300 includes an antenna 301
and an IC chip 302. [0134] (1) Antenna 301
[0135] The antenna 301 receives an activating signal from the communication
unit 103 in the digital camera 100, and sends the received activating
signal to a receiving unit 303 in the IC chip 302. Furthermore,
the antenna 301 receives a transmission signal from a transmitting
unit 306 in the IC chip 302, and transmits the received transmission
signal to the digital camera 100 through a radio wave, an electromagnetic
wave, a microwave or the like having a predetermined frequency.
[0136] (2) IC Chip 302
[0137] The IC chip 302 is constituted by the receiving unit 303,
a rectifying unit 304, a memory 305, and the transmitting unit 306
as shown in FIG. 6. The IC chip 302 is a minute computer system
specifically including a CPU, a masked ROM, an EEPROM, a RAM, and
the like. [0138] (a) Receiving Unit 303
[0139] The receiving unit 303 receives the activating signal from
the digital camera 100 through the antenna 301, and sends the received
activating signal to the rectifying unit 304. [0140] (b) Rectifying
Unit 304
[0141] The rectifying unit 304 receives the activating signal from
the receiving unit 303, and converts the activating signal into
energy by resonance, to generate an electromotive force. Thus, a
circuit in the IC chip 302 is activated, so that the IC chip 302
starts to communicate with the digital camera 100. [0142] (c) Memory
305
[0143] The memory 305 is realized using a RAM. Here, the memory
305 prestores the image processing information 122 corresponding
to the object A. The image processing information 122 is product
information for the object A, in more detail, character data showing
"42V-type plasma television 498,000!". [0144] (d) Transmitting
Unit 306
[0145] The transmitting unit 306 reads the image processing information
122 showing "42V-type plasma television 498,000!" stored
in the memory 305, when supplied with power by the rectifying unit
304. The transmitting unit 306 converts the read image processing
information 122 into a transmission signal, and transmits the transmission
signal to the digital camera 100 through the antenna 301. [0146]
4. IC Tag 400
[0147] The IC tag 400 is hung around the object B as shown in FIG.
1. As well as the IC tag 300, the IC tag 400 is a noncontact data
carrier, and does not include a battery.
[0148] The IC tag 400 includes an antenna and an IC chip, and the
IC chip is constituted by a receiving unit, a rectifying unit, a
memory, and a transmitting unit. A construction of the IC tag 400
is the same as that of the IC tag 300 shown in FIG. 6, and therefore
not shown.
[0149] The antenna in the IC tag 400 receives an activating signal
from the communication unit 103 in the digital camera 100, and sends
the received activating signal to the receiving unit in the IC chip.
Furthermore, the antenna receives a transmission signal from the
transmitting unit in the IC chip, and transmits the received transmission
signal to the digital camera 100 through a radio wave, an electromagnetic
wave, a microwave or the like having a predetermined frequency.
[0150] The IC chip is a minute computer system specifically including
a CPU, a masked ROM, an EEPROM, a RAM, and the like.
[0151] The receiving unit receives the activating signal from the
digital camera 100 through the antenna, and sends the received activating
signal to the rectifying unit.
[0152] The rectifying unit receives the activating signal from
the receiving unit, and converts the activating signal into energy
by resonance, to generate an electromotive force. Thus, a circuit
in the IC chip is activated, so that the IC chip starts to communicate
with the digital camera 100.
[0153] The memory is realized using a RAM. Here, the memory prestores
the image processing information 132 corresponding to the object
B. The image processing information 132 is copyright information
for the object B, in more detail, character data showing "COPY
NEVER". Here, the image processing information 132 may be a
flag indicating prohibition of copying.
[0154] The transmitting unit reads the image processing information
132 showing "COPY NEVER" stored in the memory, when supplied
with power by the rectifying unit. The transmitting unit converts
the read image processing information 132 to a transmission signal,
and transmits the transmission signal to the digital camera 100
through the antenna.
[0155] 5. IC Tag 500
[0156] The IC tag 500 is provided near the object C as shown in
FIG. 1. As well as the IC tags 300 and 400, the IC tag 500 is a
noncontact data carrier, and does not include a battery.
[0157] The IC tag 500 includes an antenna and an IC chip. The IC
chip is constituted by a receiving unit, a rectifying unit, a memory,
and a transmitting unit. A construction of the IC tag 500 is the
same as that of the IC tag 300 shown in FIG. 6, and therefore not
shown.
[0158] The antenna receives an activating signal from the communication
unit 103 in the digital camera 100, and sends the received activating
signal to the receiving unit in the IC chip. Furthermore, the antenna
receives a transmission signal from the transmitting unit in the
IC chip, and transmits the received transmission signal to the digital
camera 100 through a radio wave, an electromagnetic wave, a microwave
or the like having a predetermined frequency.
[0159] The IC chip is a minute computer system specifically including
a CPU, a masked ROM, an EEPROM, a RAM and the like.
[0160] The receiving unit receives the activating signal from the
digital camera 100 through the antenna, and sends the received activating
signal to the rectifying unit.
[0161] The rectifying unit receives the activating signal from
the receiving unit, and converts the activating signal into energy
by resonance, to generate an electromotive force. Thus, a circuit
in the IC chip is activated, so that the IC chip starts to communicate
with the digital camera 100.
[0162] The memory is realized using a RAM. Here, the memory prestores
the image processing information corresponding to the object C.
The image processing information is a program to perform an image-blurring
operation.
[0163] The transmitting unit reads the program stored in the memory,
when supplied with power by the rectifying unit. The transmitting
unit converts the read program into a transmission signal, and transmits
the transmission signal to the digital camera 100 through the antenna.
[0164] 6. Memory Card 600
[0165] The memory card 600 stores images, and is inserted into
the memory card slot in the digital camera 100, to be used. The
memory card 600 is constituted by a control unit and a storage unit.
[0166] The control unit receives the image data 120, 130 and 140
from the memory card access unit 110 in the digital camera 100,
and writes the received image data 120, 130, 140 into the storage
unit.
[0167] The storage unit is realized using a flash memory. The storage
unit stores the image data 120, 130 and 140 received from the control
unit. [0168] 7. Gate 700
[0169] The gate 700 is provided at the exit of the exhibition hall
as shown in FIG. 1. The user carrying the digital camera 100 passes
through the gate 700 to leave the exhibition hall.
[0170] A shape of the gate 700 shown in FIG. 1 only serves as an
example, and can be modified, similarly to the shape of the gate
200. The gate 700 is a computer system including a microprocessor,
a ROM, a RAM, and the like.
[0171] The gate 700 is constituted by a power supply unit connected
to an external power source, a control unit that controls the gate
700, a memory storing mode information, and a communication unit
that communicates with the digital camera 100. A construction of
the gate 700 is the same as that of the gate 200 shown in FIG. 5,
and therefore not shown.
[0172] The memory in the gate 700 stores mode information indicating
the selection mode. The memory transmits the mode information to
the digital camera 100 through the communication unit on a radio
wave. The transmitted mode information is received by the antenna
included in the communication unit 103 of the digital camera 100.
[0173] Here, before the user with the digital camera 100 passes
through the gate 700, the digital camera 100 stores the mode information
indicating the fixed mode/100 megapixels. When the user passes through
the gate 700, the digital camera 100 receives the mode information
transmitted from the communication unit in the gate 700. Thus, the
digital camera 100 replaces the mode information indicating the
fixed mode/100 megapixels, with the currently received mode information
indicating the selection mode.
(Operation)
[0174] The following part describes an operation of the digital
camera system 10, with reference to flow charts shown in FIGS. 7
and 8.
1. OVERVIEW
[0175] FIG. 7 is a flow chart illustrating an operation of the
digital camera system 10.
[0176] The gate 200 transmits mode information indicating the fixed
mode/100 megapixels. The communication unit 103 of the digital camera
100 receives the mode information from the gate 200 (step S101).
[0177] The communication unit 103 of the digital camera 100 sends
the received mode information indicating the fixed mode/100 megapixels
to the mode storage unit 104. The mode storage unit 104 then replaces
mode information indicating the selection mode, with the currently
received mode information indicating the fixed mode/100 megapixels.
Thus, the fixed mode is set (step S102).
[0178] When the user presses down the shutter release button included
in the operation unit 109 (step S103), the operation unit 109 generates
an operation signal corresponding to the pressing, and sends the
generated operation signal to the control unit 107. The control
unit 107 converts the operation signal into a control signal, and
sends the control signal to the driving unit 106. When receiving
the control signal, the driving unit 106 generates a first signal
and a second signal. The driving unit 106 sends the first signal
to the imaging unit 101, and the second signal to the communication
unit 103.
[0179] In accordance with the first signal, the imaging unit 101
photographs an object (step S104), generates an image signal, and
sends the image signal to the analog front end 102. When receiving
the image signal from the imaging unit 101, the analog front end
102 analog-to-digital (A/D) converts the image signal (step S105),
to generate a digital image signal. The analog front end 102 sends
the digital image signal to the image processing unit 105.
[0180] In accordance with the second signal, on the other hand,
the communication unit 103 transmits an activating signal to an
IC tag (step S106). Here, the IC tag corresponds to the object photographed
by the imaging unit 101 in the step S104. Which is to say, if the
imaging unit 101 photographs the object A in the step S104, the
communication unit 103 transmits the activating signal to the IC
tag 300. If the imaging unit 101 photographs the object B, the communication
unit 103 transmits the activating signal to the IC tag 400. If the
imaging unit 101 photographs the object C, the communication unit
103 transmits the activating signal to the IC tag 500.
[0181] An antenna included in the IC tag receives the activating
signal from the communication unit 103 of the digital camera 100
(step S107), and sends the received activating signal to an IC chip
included in the IC tag. A rectifying unit in the IC chip generates
an electromotive force by resonance (step S108), to supply power
to other constituents of the IC chip.
[0182] A transmitting unit in the IC chip reads image processing
information stored in a memory in the IC chip (step S109), and converts
the read image processing information into a transmission signal.
The IC tag transmits the transmission signal to the digital camera
100. The communication unit 103 in the digital camera 100 receives
the transmission signal (step S110). The communication unit 103
sends the received transmission signal, which indicates the image
processing information, to the image processing unit 105.
[0183] The image processing unit 105 subjects the digital image
signal received from the analog front end 102 to image processing
based on the image processing information received from the communication
unit 103. Thus, the image processing unit 105 generates image data,
and sends the image data to the control unit 107. The control unit
107 conducts image processing, according to the mode information
read from the mode storage unit 104, on the received image data
(step S111). The control unit 107 sends the image data to the memory
card access unit 110 (step S112).
[0184] The memory card 600 receives the image data sent from the
memory card access unit 110 (step S113), and stores the image data
(step S114).
[0185] The communication unit 103 of the digital camera 100 receives
mode information indicating the selection mode transmitted from
the gate 700 (step S115).
[0186] The communication unit 103 sends the received mode information
to the mode storage unit 104. The mode storage unit 104 replaces
the mode information indicating the fixed mode/100 megapixels, with
the currently received mode information indicating the selection
mode. Thus, the selection mode is set (step S116). [0187] 2. Image
Processing
[0188] FIG. 8 is a flow chart illustrating image processing performed
by the digital camera 100. The following part describes the step
S111 of the flow chart shown in FIG. 7 in detail.
[0189] The image processing unit 105 analyzes the image processing
information received from the communication unit 103 (step S201).
[0190] When the image processing information indicates an explanation
about the object (OBJECT EXPLANATION: step S202), the image processing
unit 105 generates the image data by adding character data which
shows the explanation about the object, to the digital image signal
(step S203). The image processing unit 105 sends the image data
to the control unit 107. The operation proceeds to a step S206.
[0191] When the image processing information indicates copyright
information regarding the object (COPYRIGHT INFORMATION: step S202),
the image processing unit 105 generates the image data by adding
the copyright information to the digital image signal (step S204).
The image processing unit 105 sends the image data to the control
unit 107. The operation proceeds to a step S206.
[0192] When the image processing information is a program to perform
an image-blurring operation (IMAGE-BLURRING OPERATION: step S202),
the image processing unit 105 generates the image data by performing
an image-blurring operation on the digital image signal in accordance
with the program (step S205). The image processing unit 105 sends
the image data to the control unit 107.
[0193] The control unit 107 reads the mode information stored in
the mode storage unit 104 (step S206). The control unit 107 performs
a necessary processing on the image data received from the image
processing unit 105, so as that the image data has the number of
pixels indicated by the read mode information (step S207). After
this, the operation proceeds to the step S112, and continues.
(Modification Examples)
[0194] The following part concretely describes modification examples
of the digital camera system 10. [0195] 1. Digital Camera System
20
[0196] FIG. 9 illustrates a construction of a digital camera system
20. As shown in FIG. 9, the digital camera system 20 includes a
digital camera 100a, a gate 200a, the IC tag 300, the IC tag 400,
the IC tag 500, the memory card 600 (not shown in FIG. 9), and a
gate 700a.
[0197] The digital camera system 20 is the same as the digital
camera system 10, except for the digital camera 100a, the gate 200a,
and the gate 700a. These constituents respectively replace the digital
camera 100, the gate 200, and the gate 700. [0198] (1) Construction
of the Digital Camera 100a
[0199] FIG. 10 is a functional block diagram illustrating a construction
of the digital camera 100a. As shown in FIG. 10, the digital camera
100a is constituted by an imaging unit 101a, an analog front end
102a, a communication unit 103a, a flag storage unit 104a, an image
processing unit 105a, a driving unit 106a, a control unit 107a,
a display unit 108a, an operation unit 109a, and a memory card access
unit 110a.
[0200] Here, the imaging unit 101a, the analog front end 102a,
the communication unit 103a, the driving unit 106a, the display
unit 108a, the operation unit 109a and the memory card access unit
110a respectively have the same functions as the imaging unit 101,
the analog front end 102, the communication unit 103, the driving
unit 106, the display unit 108, the operation unit 109, and the
memory card access unit 110 in the digital camera 100.
[0201] The following part describes the flag storage unit 104a,
the image processing unit 105a, and the control unit 107a which
respectively have different functions from their corresponding constituents
in the digital camera 100.
[0202] (a) The flag storage unit 104a has an area for storing flag
information. The flag storage unit 104a does not store flag information
(OFF) in an initial state. Here, the initial state means that the
user carrying the digital camera 100a has not passed through the
gate 200a.
[0203] When the user passes through the gate 200a with the digital
camera 100a, the flag storage unit 104a receives flag control information
indicating ON, through the communication unit 103a from the gate
200a. Thus, the flag storage unit 104a stores flag information (ON).
[0204] When the user passes through the gate 700a with the digital
camera 100a, the flag storage unit 104a receives flag control information
indicating OFF through the communication unit 103a from the gate
700a. Thus, the flag storage unit 104a deletes the stored flag information
(OFF).
[0205] (b) The image processing unit 105a includes a microprocessor
and the like, and has a function of performing image processing
on a digital image signal received from the analog front end 102a,
as well as the image processing unit 105 in the digital camera 100.
Differently from the image processing unit 105, however, the image
processing unit 105a does not perform image processing on a received
digital image signal unconditionally. The image processing unit
105a performs image processing on a received digital image signal,
and sends the processed digital image signal to the control unit
107a, only when the flag storage unit 104a stores flag information.
If the flag storage unit 104a does not store flag information, the
image processing unit 105a does not perform image processing on
a received digital image signal, and sends the digital image signal
to the control unit 107a as it is.
[0206] In detail, the image processing unit 105a receives the digital
image signal corresponding to the object C from the analog front
end 102a, and receives image processing information indicating an
image-blurring operation from the communication unit 103a. Furthermore,
the image processing unit 105a receives a signal indicating a state
of the flag storage unit 104a, from the control unit 107a.
[0207] If the signal received from the control unit 107a indicates
ON, the image processing unit 105a performs an image-blurring operation
on the digital image signal, to generate the image data 140. The
image processing unit 105a sends the image data 140 to the control
unit 107a.
[0208] If the signal received from the control unit 107a indicates
OFF, the image processing unit 105a sends the digital image signal
received from the analog front end 102a to the control unit 107a
as it is.
[0209] The same is true for a case where the image processing unit
105a receives the digital image signal 121 and the image processing
information 122 corresponding to the object A, or the digital image
signal 131 and the image processing information 132 corresponding
to the object B. Which is to say, the image processing unit 105a
judges whether to perform image processing, according to a signal
which is received from the control unit 107a and indicates the state
of the flag storage unit 104a.
[0210] (c) The control unit 107a includes a microprocessor, a ROM,
a RAM, and the like, similarly to the control unit 107.
[0211] When receiving an operation signal indicating that a shutter
release button has been pressed down from the operation unit 109a,
the control unit 107a generates a control signal indicating the
pressing, and sends the control signal to the driving unit 106a.
Also, the control unit 107a examines a predetermined area in the
flag storage unit 104a to judge whether the flag storage unit 104a
stores flag information.
[0212] If the flag storage unit 104a stores flag information, the
control unit 107a sends a signal indicating ON to the image processing
unit 105a. If the flag storage unit 104a does not store flag information,
the control unit 107a sends a signal indicating OFF to the image
processing unit 105a.
[0213] The control unit 107a receives a digital image signal, or
image data generated by performing image processing on a digital
image signal, from the image processing unit 105a and writes the
received digital image signal or image data into the memory card
600 through the memory card access unit 110a. [0214] (2) CONSTRUCTION
OF THE GATE 200a
[0215] The gate 200a is provided at an entrance of an exhibition
hall as shown in FIG. 9. The gate 200a has the same construction
as the gate 200 shown in FIG. 5. However, the gate 200a transmits
different information to the digital camera 100a, from the gate
200. The gate 200a stores flag control information including an
instruction to write flag information into the flag storage unit
104a. The gate 200a includes an antenna, to transmit the stored
flag control information through a radio wave. The flag control
information is transmitted from the antenna in the gate 200a to
an antenna included in the communication unit 103a in the digital
camera 100a.
[0216] If flag information is written into the flag storage unit
104a, the image processing unit 105a performs image processing on
a digital image signal obtained based on photographing of an object,
in accordance with image processing information the digital camera
100a receives from an IC tag during the photographing. To be specific,
when the user carrying the digital camera 100a passes through the
gate 200a to enter the exhibition hall, flag information is written
into the digital camera 100a. After this, the image processing unit
105a performs image processing on a digital image signal.
[0217] Similarly to the shape of the gate 200, a shape of the gate
200a may be modified as long as the gate 200a is a computer system
having the functions shown in FIG. 5. [0218] (3) Construction of
the Gate 700a
[0219] The gate 700a is provided at an exit of the exhibition hall,
as well as the gate 700 (see FIG. 9). The gate 700a has the same
construction as the gate 700, but transmits different information
to the digital camera 100a, from the gate 700.
[0220] The gate 700a stores flag control information including
an instruction to delete stored flag information. The gate 700a
includes an antenna, to transmit the stored flag control information
through a radio wave. The flag control information transmitted from
the antenna in the gate 700a is received by the antenna included
in the communication unit 103a in the digital camera 100a.
[0221] If flag information is deleted from the flag storage unit
104a, the image processing unit 105a sends a digital image signal
obtained based on photographing of an object without performing
image processing, even when receiving image processing information
from an IC tag during the photographing. To be specific, when the
user carrying the digital camera 100a passes through the gate 700a
to leave the exhibition hall, flag information is deleted from the
digital camera 100a. After this, the image processing unit 105a
no longer performs image processing on a digital image signal.
[0222] As well as the shape of the gate 700, a shape of the gate
700a can be modified. [0223] (4) Operation of the Digital Camera
System 20
[0224] FIGS. 11 and 12 are flow charts illustrating an operation
of the digital camera system 20.
[0225] The gate 200a transmits flag control information indicating
ON. The communication unit 103a in the digital camera 100a receives
the flag control information from the gate 200a (step S301).
[0226] The communication unit 103a sends the received flag control
information to the flag storage unit 104a. Then, the flag storage
unit 104a executes an instruction included in the received flag
control information, to store flag information (step S302).
[0227] When the user presses down a shutter release button in the
operation unit 109a (step S303), the operation unit 109a generates
an operation signal corresponding to the pressing, and sends the
operation signal to the control unit 107a. The control unit 107a
converts the operation signal into a control signal, and sends the
control signal to the driving unit 106a. When receiving the control
signal corresponding to the pressing of the shutter release button,
the driving unit 106a generates a first signal and a second signal.
The driving unit 106a sends the first signal to the imaging unit
101a, and the second signal to the communication unit 103a.
[0228] In accordance with the first signal, the imaging unit 101a
photographs an object (step S304), to generate an image signal.
The imaging unit 101a sends the image signal to the analog front
end 102a. The analog front end 102a A/D converts the received image
signal, to generate a digital image signal (step S305). The analog
front end 102a sends the digital image signal to the image processing
unit 105a.
[0229] In accordance with the second signal, the communication
unit 103a transmits an activating signal to an IC tag (step S306).
The IC tag corresponds to the object photographed in the step S304.
For example, if the imaging unit 101a photographs the object A in
the step S304, the communication unit 103a transmits the activating
signal to the IC tag 300. If the imaging unit 101a photographs the
object B, the communication unit 103a transmits the activating signal
to the IC tag 400. If the imaging unit 101a photographs the object
C, the communication unit 103a transmits the activating signal to
the IC tag 500.
[0230] An antenna included in the IC tag receives the activating
signal from the communication unit 103a of the digital camera 100a
(step S307), and sends the received activating signal to an IC chip
included in the IC tag. A rectifying unit in the IC chip generates
an electromotive force by resonance (step S308), to supply power
to other constituents of the IC chip.
[0231] A transmitting unit in the IC chip reads image processing
information stored in a memory in the IC chip (step S309), and converts
the read image processing information into a transmission signal.
The IC tag transmits the transmission signal to the digital camera
100a. The communication unit 103a in the digital camera 100a receives
the transmission signal (step S310). The communication unit 103a
sends the received transmission signal, which indicates the image
processing information, to the image processing unit 105a.
[0232] The control unit 107a reads a predetermined area in the
flag storage unit 104a to judge whether flag information has been
stored (ON or OFF) (step S311). The control unit 107a sends a signal
indicating a result of the judgment to the image processing unit
105a.
[0233] If the signal indicates OFF (OFF:step S312), the next step
is a step S314. If the signal indicates ON (ON:step S312), the image
processing unit 105a subjects the digital image signal received
from the analog front end 102a to image processing in accordance
with the image processing information received from the communication
unit 103a, to generate image data (step S313).
[0234] The control unit 107a receives the generated image data
from the image processing unit 105a, and sends the image data to
the memory card access unit 110a (step S314).
[0235] The memory card access unit 110a sends the received image
data to the memory card 600. The memory card 600 receives the image
data (step S315), and stores the image data (step S316)
[0236] The communication unit 103a of the digital camera 100a receives
flag control information indicating OFF transmitted from the gate
700a (step S317).
[0237] The communication unit 103a in the digital camera 100a sends
the received flag control information to the flag storage unit 104a.
The flag storage unit 104a executes an instruction included in the
received flag control information indicating OFF, to delete the
stored flag information (step S318). [0238] (5) Image Processing
[0239] FIG. 13 is a flow chart illustrating image processing performed
by the digital camera 100a. The following part describes the step
S313 of the flow chart shown in FIG. 12 in detail.
[0240] The image processing unit 105a analyzes the image processing
information received from the communication unit 103a (step S401).
[0241] When the image processing information indicates an explanation
about the object (OBJECT EXPLANATION: step S402), the image processing
unit 105a generates the image data by adding character data which
shows the explanation about the object to the digital image signal
(step S403). The image processing unit 105a sends the generated
image data to the control unit 107a.
[0242] When the image processing information indicates copyright
information regarding the object (COPYRIGHT.
[0243] INFORMATION: step S402), the image processing unit 105a
generates the image data by adding the copyright information to
the digital image signal (step S404). The image processing unit
105a sends the generated image data to the control unit 107a.
[0244] When the image processing information is a program to perform
an image-blurring operation (IMAGE-BLURRING OPERATION: step S402),
the image processing unit 105a generates the image data by performing
an image-blurring operation on the digital image signal in accordance
with the program (step S405). The image processing unit 105a sends
the generated image data to the control unit 107a. After this, the
operation proceeds to the step S314, and continues. [0245] 2. System
Including Digital Camera 100b
[0246] The following part describes a digital camera system, which
is another modification example. This digital camera system is the
same as the digital camera system 20, except for having a digital
camera 100b (shown in FIG. 14), a gate 200b (not shown), and a gate
700b (not shown) instead of the digital camera 100a, the gate 200a,
and the gate 700a. [0247] (1) Construction of the Digital Camera
100b
[0248] As shown in FIG. 14, the digital camera 100b is constituted
by an imaging unit 101b, an analog front end 102b, a communication
unit 103b, a mode storage unit 104b, an image processing unit 105b,
a driving unit 106b, a control unit 107b, a display unit 108b, an
operation unit 109b, and a memory card access unit 110b.
[0249] Here, the imaging unit 101b, the analog front end 102b,
the communication unit 103b, the driving unit 106b, the display
unit 108b, the operation unit 109b, and the memory card access unit
110b respectively have the same functions as their corresponding
constituents of the digital camera 100. The image processing unit
105b has the same function as the image processing unit 105a in
the digital camera 100a.
[0250] The following part describes the mode storage unit 104b
and the control unit 107b which respectively have different functions
from their corresponding constituents in the digital cameras 100
and 100a.
[0251] (a) The mode storage unit 104b has the same functions as
the mode storage unit 104 in the digital camera 100 and the flag
storage unit 104a in the digital camera 100a. Therefore, the mode
storage unit 104b stores mode information, and also has an area
for storing flag information.
[0252] Here, mode information is related to the number of pixels,
and indicates one of the selection mode and the fixed mode/100 megapixels.
[0253] In an initial state, the mode storage unit 104b stores mode
information indicating the selection mode, and does not store flag
information (OFF) Here, the initial state means that the user carrying
the digital camera 100b has not passed the gate 200b.
[0254] When the user passes through the gate 200b to enter an exhibition
hall with the digital camera 100b, the mode storage unit 104b receives
mode information indicating the fixed mode/100 megapixels from the
gate 200b through the communication unit 103b. The mode storage
unit 104b replaces the stored mode information indicating the selection
mode, with the currently received mode information indicating the
fixed mode/100 megapixels.
[0255] Furthermore, the mode storage unit 104b receives flag control
information indicating ON through the communication unit 103b from
the gate 200b. Thus, the mode storage unit 104b stores flag information
in a predetermined area.
[0256] When the user passes through the gate 700b with the digital
camera 100b to leave the exhibition hall, the mode storage unit
104b receives mode information indicating the selection mode from
the gate 700b through the communication unit 103b. The mode storage
unit 104b replaces the mode information indicating the fixed mode/100
megapixels, with the currently received mode information indicating
the selection mode.
[0257] Furthermore, the mode storage unit 104b receives flag control
information indicating OFF through the communication unit 103b from
the gate 700b. Thus, the mode storage unit 104b deletes the stored
flag information from the predetermined area.
[0258] (b) The control, unit 107b includes a microprocessor, a
ROM, a RAM, and the like.
[0259] When receiving an operation signal indicating that a shutter
release button is pressed down from the operation unit 109b, the
control unit 107b generates a control signal indicating the pressing,
and sends the control signal to the driving unit 106b. The control
unit 107b further examines the predetermined area in the mode storage
unit 104b in order to judge whether the mode storage unit 104b stores
flag information.
[0260] If the mode storage unit 104b stores flag information, the
control unit 107b sends a signal indicating ON to the image processing
unit 105b. If the mode storage unit 104b does not store flag information,
the control unit 107b sends a signal indicating OFF to the image
processing unit 105b.
[0261] When receiving a digital image signal, or image data generated
by performing image processing on a digital image signal from the
image processing unit 105b, the control unit 107b reads mode information
from the mode storage unit 104b. Here, the read mode information
indicates the fixed mode/100 megapixels.
[0262] The control unit 107b performs an appropriate processing
on the received digital image signal or image data, so that the
digital image signal or image data has 100 megapixels. Then, the
control unit 107b writes the processed digital image signal or image
data into the memory card 600 through the memory card access unit
110b.
[0263] If the mode information read from the mode storage unit
104b indicates the selection mode, the control unit 107b performs
an appropriate processing on the digital image signal or image data
received from the image processing unit 105b so that the digital
image signal or image data has the specific number of pixels. Here,
the specific number of pixels is stored in the control unit 107b.
[0264] (2) Construction of the Gate 200b
[0265] The gate 200b is provided at an entrance of the exhibition
hall, similarly to the gates 200 and 200a. The gate 200b has the
same construction as the gate 200 shown in FIG. 5.
[0266] However, the gate 200b transmits different information to
the digital camera 100b, from the gates 200 and 200a. In detail,
information transmitted from the gate 200b to the digital camera
100b includes both the information transmitted from the gate 200
to the digital camera 100, and the information transmitted from
the gate 200a to the digital camera 100a.
[0267] To be further specific, the gate 200b stores mode information
indicating the fixed mode/100 megapixels and flag control information
including an instruction to store flag information into the digital
camera 100b. The gate 200b includes an antenna as well as the gates
200 and 200a, to transmit the stored mode information and flag control
information through a radio wave. The mode information and flag
control information is transmitted from the antenna in the gate
200b to an antenna included in the communication unit 103b in the
digital camera 100b.
[0268] Similarly to the shapes of the gates 200 and 200a, a shape
of the gate 200b can be modified as long as the gate 200b is a computer
system having the functions shown in FIG. 5. [0269] (3) Construction
of the Gate 700b
[0270] The gate 700b is provided at an exit of the exhibition hall,
as well as the gates 700 and 700a. The gate 700b has the same construction
as the gate 700.
[0271] However, the gate 700b transmits different information to
the digital camera 100b, from the gates 700 and 700a. In detail,
information transmitted from the gate 700b to the digital camera
100b includes both the information transmitted from the gate 700
to the digital camera 100 and the information transmitted from the
gate 700a to the digital camera 100a.
[0272] To be further specific, the gate 700b stores mode information
indicating the selection mode, and flag control information including
an instruction to delete flag information from the digital camera
100b. The gate 700b includes an antenna as well as the gates 700
and 700a, to transmit the stored mode information and flag control
information through a radio wave. The mode information and flag
control information transmitted from the antenna in the gate 700b
is received by the antenna included in the communication unit 103b
in the digital camera 100b.
[0273] As well as the shapes of the gates 700 and 700a, a shape
of the gate 700b can be modified as long as the gate 700b is a computer
system having the functions shown in FIG. 5. [0274] (4) Operation
of the System Including the Digital Camera 100b
[0275] FIGS. 15 and 16 are flow charts illustrating an operation
of the system including the digital camera 100b.
[0276] The gate 200b transmits mode information indicating the
fixed mode/100 megapixels and flag control information indicating
ON. The communication unit 103b in the digital camera 100b receives
the mode information and the flag control information from the gate
200b (step S501).
[0277] The communication unit 103b sends the received mode information
and flag control information to the mode storage unit 104b. The
mode storage unit 104b replaces stored mode information with the
currently received mode information indicating the fixed mode/100
megapixels (step S502). In addition, the mode storage unit 104b
executes an instruction included in the currently received flag
control information, to store flag information in a predetermined
area (step S503).
[0278] When the user presses down a shutter release button in the
operation unit 109b (step S504), the operation unit 109b generates
an operation signal corresponding to the pressing, and sends the
operation signal to the control unit 107b. The control unit 107b
converts the operation signal into a control signal, and sends the
control signal to the driving unit 106b. The driving unit 106b then
generates a first signal and a second signal. The driving unit 106b
sends the first signal to the imaging unit 101b, and the second
signal to the communication unit 103b.
[0279] In accordance with the first signal, the imaging unit 101b
photographs an object (step S505), to generate an image signal.
The imaging unit 101b sends the image signal to the analog front
end 102b. The analog front end 102b A/D converts the received image
signal, to generate a digital image signal (step S506). The analog
front end 102b sends the generated digital image signal to the image
processing unit 105b.
[0280] In accordance with the second signal, the communication
unit 103b transmits an activating signal to an IC tag (step S507).
Here, the IC tag corresponds to the object photographed in the step
S505. For example, if the imaging unit 101b photographs the object
A in the step S505, the communication unit 103b transmits the activating
signal to the IC tag 300. If the imaging unit 101b photographs the
object B, the communication unit 103b transmits the activating signal
to the IC tag 400. If the imaging unit 101b photographs the object
C, the communication unit 103b transmits the activating signal to
the IC tag 500.
[0281] An antenna included in the IC tag receives the activating
signal from the communication unit 103b of the digital camera 100b
(step S508), and sends the received activating signal to an IC chip
included in the IC tag. A rectifying unit in the IC chip generates
an electromotive force by resonance (step S509), to supply power
to other constituents of the IC chip.
[0282] A transmitting unit in the IC chip reads image processing
information stored in a memory in the IC chip (step S510), and converts
the read image processing information into a transmission signal.
The IC tag transmits the transmission signal to the digital camera
100b. The communication unit 103b in the digital camera 100b receives
the transmission signal (step S511). The communication unit 103b
sends the received transmission signal, which indicates the image
processing information, to the image processing unit 105b.
[0283] The control unit 107b reads a predetermined area in the
mode storage unit 104b to judge whether flag information has been
stored (step S512) The control unit 107b sends a signal indicating
a result of the judgment to the image processing unit 105b.
[0284] If the signal indicates OFF (OFF:step S513), the next step
is a step S606 shown in FIG. 17. If the signal indicates ON (ON:
step S513), the image processing unit 105b subjects the digital
image signal received from the analog front end 102b to image processing
in accordance with the image processing information received from
the communication unit 103b, to generate image data (step S514).
[0285] The control unit 107b sends the image data to the memory
card access unit 110b (step S515).
[0286] The memory card access unit 110b sends the received image
data to the memory card 600. The memory card 600 receives the image
data (step S516), and stores the image data (step S517).
[0287] The gate 700b transmits mode information indicating the
selection mode and flag control information indicating OFF. The
communication unit 103b of the digital camera 100b receives the
mode information and flag control information from the gate 700b
(step S518).
[0288] The communication unit 103b in the digital camera 100b sends
the received mode information and flag control information to the
mode storage unit 104b. The mode storage unit 104b executes an instruction
included in the received flag control information, to delete the
stored flag information (step S519). Furthermore, the mode storage
unit 104b replaces the stored mode information with the currently.
received mode information indicating the selection mode (step S520).
[0289] (5) Image Processing
[0290] FIG. 17 is a flow chart illustrating image processing performed
by the digital camera 100b. The following part describes the step
S514 of the flow chart shown in FIG. 16 in detail.
[0291] The image processing unit 105b analyzes the image processing
information received from the communication unit 103b (step S601).
[0292] When the image processing information indicates an explanation
about the object (OBJECT EXPLANATION: step S602), the image processing
unit 105b generates the image data by adding character data which
shows the explanation about the object to the digital image signal
(step S603). The image processing unit 105b sends the generated
image data to the control unit 107b.
[0293] When the image processing information indicates copyright
information regarding the object (COPYRIGHT INFORMATION: step S602),
the image processing unit 105b generates the image data by adding
the copyright information to the digital image signal (step S604).
The image processing unit 105b sends the generated image data to
the control unit 107b.
[0294] When the image processing information is a program to perform
an image-blurring operation (IMAGE-BLURRING OPERATION: step S602),
the image processing unit 105b generates the image data by performing
an image-blurring operation on the digital image signal in accordance
with the program (step S605). The image processing unit 105b sends
the generated image data to the control unit 107b.
[0295] After this, the control unit 107b reads the mode information
stored in the mode storage unit 104b (step S606). The control unit
107b performs an appropriate processing on the image data received
from the image processing unit 105b, so that the image data has
the number of pixels specified by the read mode information (step
S607). Then, the operation proceeds to the step S515, and continues.
[0296] 3. Other Modification Examples
[0297] (a) According to the above-described modification examples,
after the digital camera (100a and 100b) receives information from
the gate (200a and 200b) provided at the entrance of the exhibition
hall, image processing is performed in accordance with image processing
information received from the IC tag (300, 400 and 500). However,
this construction may be modified in such a manner that image processing
is prohibited after the digital camera (100a and 100b) receives
information from the gate (200a and 200b).
[0298] Likewise, according to the above-described modification
examples, after the digital camera (100a and 100b) receives information
from the gate (700a and 700b) provided at the exit of the exhibition
hall, image processing in accordance with image processing information
received from the IC tag (300, 400 and 500) is prohibited. However,
this construction may be modified in such a manner that image processing
is performed after the digital camera (100a and 100b) receives information
from the gate (700a and 700b).
[0299] (b) The above-described modification examples may be further
modified in the following manner. After receiving flag control information
from the gate (200a and 200b), the digital camera (100a and 100b)
may generate image data by photographing an object, but does not
send the image data to the memory card 600. Instead, the digital
camera (100a and 100b) discards the generated image data, so that
the image data is not written into the memory card 600.
[0300] (c) According to the above-described modification examples,
the digital camera (100a and 100b) judges whether having received
information from the gate (200a, 200b, 700a and 700b), based on
presence or absence of flag information in the digital camera (100a
and 100b). Here, the gate (200a, 200b, 700a and 700b) may transmit
flag control information to the digital camera (100a and 100b) which
indicates zero or one. Here, flag control information indicating
zero means that flag information is not stored, and flag control
information indicating one means flag information is stored. To
be specific, the digital camera (100a and 100b) receives flag control
information indicating one from the gate (200a and 200b) at the
entrance, and receives flag control information indicating zero
from the gate (700a and 700b) at the exit. In this way, the digital
camera system 20 and the system including the digital camera 100b
can be also realized.
[0301] It should be noted that the digital camera (100a and 100b)
does not necessarily use a flag to judge whether the user with the
digital camera (100a and 100b) has passed the gate (200a, 200b,
700a and 700b). The digital camera (100a and 100b) may use different
means.
[0302] (d) The present invention includes a combination of the
digital camera system 20, the system including the digital camera
100b, and the system described in (b).
[0303] If such is the case, a digital camera receives flag control
information indicating zero, one, or two, from a gate provided at
an entrance of an exhibition hall. If the received flag control
information indicates zero, the digital camera photographs an object,
to generate image data, but discards the image data. If the received
flag control information indicates one, the digital camera photographs
an object, to generate image data, and sends the image data without
processing, to a memory card. If the received flag control information
indicates two, the digital camera photographs an object, to generate
image data, subjects the image data to image processing in accordance
with image processing information received from an IC tag, and then
sends the resulting image data to a memory card.
(Other Modifications)
[0304] As described above, the present invention provides a digital
camera system which can perform image processing on image data generated
by a digital camera, regardless of an intention of a user of the
digital camera.
[0305] The above embodiment and modification examples only serve
as an example. The present invention is not limited to such, and
further includes the following modifications.
[0306] (1) The present invention may provide a system including
a digital camera and an IC tag, without a gate. Furthermore, the
present invention may provide a system including a digital camera
and a gate, without an IC tag.
[0307] (2) According to the above embodiment and the modification
examples, the IC tag 300, the IC tag 400, and the IC tag 5 |