JP3431433B2 - Electro-developing recording medium and white balance adjusting device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera using a recording medium for electronically developing an image obtained by exposure, and more particularly to a device for adjusting white balance when reading an image from the recording medium.

[0002]

2. Description of the Related Art Conventionally, a photographic material capable of electronically developing an optical image obtained by a taking lens has been known. For example, JP-A-5-2280 discloses an electrostatic information recording medium and a charge. A recording medium combined with a holding medium is disclosed. In this specification, such a recording medium is called an electro-developing recording medium, and a camera using this electro-developing recording medium is called an electro-developing camera.

[0003]

As an electro-developing camera for taking a color image, a configuration is conceivable in which one color image is obtained by one shutter release operation.
In such a configuration, a color filter having, for example, red, green, and blue filter elements is arranged in front of the electro-developing recording medium.

However, the illuminance of the light applied to the electro-developing recording medium through each filter element is not necessarily the same because of the characteristics of the color filter or the characteristics of the illumination of the subject. Therefore, for example, it is necessary to perform white balance adjustment when reading an image from an electro-developing recording medium. Therefore, the electro-developing camera includes a white balance sensor for detecting the amount of light energy of each color component. A circuit such as a white balance signal processing circuit that converts the output signal from this sensor into color temperature information and also performs white balance adjustment based on this color temperature information during image reproduction is required. However, such a configuration has a problem that the circuit configuration inside the electro-developing camera becomes complicated because various circuits are provided.

The present invention adjusts the white balance according to the exposure amount of light of each color component incident on the electro-developing recording medium to obtain an image of an appropriate color. It is an object of the present invention to provide an adjusting device and an electro-developing recording medium suitable for use in such an electro-developing camera.

[0006]

An electro-developing recording medium according to the present invention is provided with an image recording area for recording a color image, and is provided outside the image recording area, and is exposed to light of a predetermined color component. And a data area for recording optical information corresponding to the quantity. The predetermined color components are, for example, red, green and blue.

The electro-developing recording medium is composed of an electrostatic information recording medium on which electric charges are generated according to an image and a charge holding medium on which a visible image is generated according to the electric charges and which can hold the visible image. It may be provided. In this case, the charge holding medium is preferably a liquid crystal display element using a memory type liquid crystal.

A white balance adjusting device for an electro-developing camera according to the present invention is provided with an image recording area for recording a color image and an exposure amount of light of a predetermined color component provided outside the image recording area. An electro-developing recording medium having a data area for recording corresponding optical information is used, which is provided at a position corresponding to the image recording area and has a color filter element of a predetermined color component. Color filter and a second color filter provided at a position corresponding to the data area and having a color filter element of a predetermined color component, and a second color filter provided at a position corresponding to the second color filter and guided to the data area. And a diffuser plate that acts so that the illuminance of the shined light is uniform in the data area.

The color components of the first color filter are, for example,
Red, green, and blue, and the color components of the second color filter are, for example, red, green, and blue.

The white balance adjusting apparatus of the present invention uses a line sensor for reading an image recorded on an electro-developing recording medium and a line sensor based on the optical information read by the line sensor and recorded in the data area. Adjustment means for adjusting the gain of the image signal read from the sensor may be provided. In this case, the line sensor, after reading the optical information recorded in the data area,
It is preferable to read a color image recorded in the image area.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an external view of a still video camera to which an embodiment of the present invention is applied. This camera is an electro-developing type camera and uses an electro-developing type recording medium as a recording medium.

When the camera body 11 is viewed from the front, a photographing optical system 12 provided with a photographing lens and the like is provided at the substantially center of the front surface, and a white diffusion for adjusting white balance is provided on the upper right of the photographing optical system 12. A plate 13 is provided. A release switch 14 is provided on the side opposite to the white diffuser plate 13. The finder 15 is provided at the center of the upper surface of the camera body 11, and a scanner switch 16 is provided on the side of the finder 15. In order to output the image signal obtained by this camera to an external recording device or the like, an external output terminal 17 is provided on the lower portion of the side surface of the camera body 11. A slot for mounting an electro-developing recording medium in the camera body 11 is formed in the lower portion of the side surface of the camera body 11, and this slot is usually closed by a lid 18.

FIG. 2 is a block diagram of the still video camera of this embodiment. The system control circuit 20 is a microcomputer and controls the entire still video camera.

The photographing optical system 12 includes a plurality of lens groups,
A diaphragm 12a is provided. An electro-developing recording medium 30 is disposed behind the taking optical system 12, and a mask in which first and second color filters 53 and 54 are fitted to the taking optical system 12 side of the electro-developing recording medium 30. Member 52
Is provided. A quick return mirror 21 is provided between the photographing optical system 12 and the electro-developing recording medium 30, and a shutter 22 is provided between the quick return mirror 21 and the electro-developing recording medium 30. A focus plate 23 a of the finder optical system 23 is arranged above the quick return mirror 21.

The quick return mirror 21 and the shutter 22 are driven by a mirror drive circuit 25 and a shutter drive circuit 26, respectively, and these circuits 24 and 2 are driven.
5, 26 are controlled by an exposure control circuit 27. The exposure control circuit 27 operates according to a command signal output from the system control circuit 20. That is, the quick return mirror 21 is normally set at the down position (inclined state shown by the solid line) where the subject image is observed, and the light passing through the photographing optical system 12 is used for the viewfinder optical system 2.
However, in the shooting operation, the mirror drive circuit 25 causes the mirror drive circuit 25 to rotate upward under the control of the exposure control circuit 27 based on the output signal from the photometric sensor 28 to the up position (horizontal state indicated by the broken line). Determined. Although the shutter 22 is normally closed, during the shooting operation, the shutter drive circuit 26 opens it for a predetermined time under the control of the exposure control circuit 27, whereby the light passing through the shooting optical system 12 is transferred to the electro-developing recording medium 30. The light receiving surface is irradiated.

The diaphragm 12a is a fixed diaphragm and has an opening having a predetermined diameter. The aperture diameter of the diaphragm 12a is such that the illuminance when light from a light source having a predetermined illuminance is incident on the image recording area 30a (see FIG. 4) of the electro-developing recording medium 30 through the photographing lens, the diffusion plate, and the light guide. It is adjusted and set in advance so that the illuminance of the light incident on the data area 30b (see FIG. 4) through the member matches.

The electro-developing recording medium 30 has an image recording area 30a and a data area 30b (see FIG. 4). The data area 30b is formed outside the image recording area 30a, and is in a position where it does not interfere with the light flux from the photographing optical system 12. A color image is recorded in the image recording area 30a by the photographing operation via the first color filter 53. A voltage is applied to the electro-developing recording medium 30 under the control of the recording-medium driving circuit 41, and an image is formed on the electro-developing recording medium 30 by the photographing optical system 12 by being exposed during the voltage application. The developed color image is developed as a visible image. The recording medium drive circuit 41 operates according to a command signal output from the system control circuit 20.

During the photographing operation, the electro-developing recording medium 30 is also used.
In the data area 30b, optical information, which is data necessary for white balance adjustment, is formed via the second color filter 54. That is, in the data area 30b, for example, each color component corresponding to the light exposure amount (energy amount per unit time, that is, light intensity) of each color component of red (R), green (G), and blue (B). The transmittance of each area changes and is optically recorded as information necessary for white balance adjustment. Therefore, at the time of shooting operation, a subject image is recorded in the image recording area 30a and optical information necessary for white balance adjustment is recorded in the data area 30b at the same time. In the electro-developing recording medium used in the present embodiment, the higher the exposure amount, the higher the transmittance.

The diffuser plate 13 acts so that the illuminance of the light guided to the data area 30b becomes uniform in the data area 30b, and a rectangular tube-shaped light guide is provided between the diffuser plate 13 and the shutter 22. A member 55 is provided. That is, the light that has entered the diffusion plate 13 passes through the inside of the light guide member 55 and passes through the second color filter 54 and the data area 30.
guided by b.

The electro-developing recording medium 30 can be linearly displaced by the recording medium transfer mechanism 51. The recording medium transfer mechanism 51 is controlled by the system control circuit 20, and the electro-developing recording medium 30 is stationary during the photographing operation, but when the image recorded on the electro-developing recording medium 30 is read, the electro-developing type recording medium 30 is read. The recording medium 30 is transferred by the recording medium transfer mechanism 51. During this reading operation, first, the optical information (transmittance) for white balance adjustment formed in the data area 30b is read, and then the image (subject image) formed in the image recording area 30a is read.

For this image reading operation, for example, L
A light source 42 including an ED (light emitting element) and a line sensor 44
And first and second scanner optical systems 43a and 43b. Light source 42 and first scanner optical system 43a
Is disposed on the front side of the electro-developing recording medium 30, that is, on the side of the photographing optical system 12, and the second scanner optical system 43b and the line sensor 44 are disposed on the back side of the electro-developing recording medium 30. That is, during the image reading operation, the optical information in the data area 30b and the image in the image recording area 30a are
It is illuminated by the light source 42 and the first scanner optical system 43a, and is imaged on the light receiving surface of the line sensor 44 by the action of the second scanner optical system 43b. Line sensor 4
For example, a 2000-pixel CCD one-dimensional sensor or the like can be used as 4.

The on / off control of the light source 42 is performed by the illumination light source drive circuit 45, and the control such as the reading operation of the pixel signal generated in the line sensor 44 is performed by the line sensor drive circuit 4.
It is performed by 7. These circuits 45 and 47 are controlled by the system control circuit 20.

The pixel signal read from the line sensor 44 is amplified by the amplifier 61 and converted into a digital signal by the A / D converter 62. Under the control of the system control circuit 20, the digital pixel signal is subjected to shading correction and gamma correction in the image processing circuit 63, gain adjustment (white balance adjustment) described later, and the like, and then temporarily stored in the memory 64 as image data. Stored in. The memory 64 has a storage capacity for one screen. Further, the memory 64 has an E ² PROM, and a correction value such as shading correction is stored in this E ² PROM.

The pixel signal read from the memory 64 is
It can be input from the image processing circuit 63 to the interface circuit 65, subjected to predetermined processing such as format conversion, and output to an external computer (not shown) or the like via the output terminal 17. The image data output from the image processing circuit 63 is subjected to predetermined processing such as image compression or format conversion in the recording device control circuit 66, and recorded in a recording medium such as an IC memory card in the image recording device 67. It is possible. The interface circuit 65 and the recording device control circuit 66 operate according to a command signal from the system control circuit 20.

A release switch 14 and a scanner switch 16 are connected to the system control circuit 20,
According to the operation of these switches 14 and 16, the photographing operation and the image signal reading operation are performed. Further, the system control circuit 20 is connected with a display element 68 for displaying various setting states of the still video camera.

FIG. 3 is a perspective view showing a structure in the vicinity of a portion where the electro-developing recording medium 30 is arranged. FIG. 4 is a view of this configuration as viewed from the finder 23 (see FIG. 2) side, and the mask member 52 and the first and second color filters 53 and 54 are shown as a cross-sectional view. The electro-developing recording medium 30 is movable in the direction of arrow A in FIG. 3 from the position on the rear side of the mask member 52, and during the image reading operation, the first and second scanner optical systems 43a and 43b.
Move between. First and second scanner optical system 43
The a, 43b, the light source 42, and the line sensor 44 extend in the vertical direction and can read the image formed on the electro-developing recording medium 30 line by line. The light guide member 55 extends in a direction perpendicular to the light receiving surface of the electro-developing recording medium 30, that is, in a direction parallel to the optical axis L of the photographing optical system 12.

FIG. 5 shows the arrangement of the first and second color filters 53 and 54 on the mask member 52. The first color filter 53 is the electro-developing recording medium 3
It is provided at a position corresponding to the image recording area 30a of 0 and has substantially the same shape as the image recording area 30a. The second color filter 54 is provided at a position corresponding to the data area 30b of the electro-developing recording medium 30, and
It has almost the same shape as. The first shown in FIG.
And the ratio of the sizes of the second color filters 53 and 54 is different from the actual one.

As shown in FIG. 6, the first color filter 5
3 has R, G, and B filter elements, and these filter elements are arranged in a matrix according to a predetermined arrangement as conventionally known. The pitch between these filter elements is equal to the pixel pitch of the line sensor 44,
Further, it is equal to the movement pitch of the electro-developing recording medium 30 in the reading operation.

The second color filter 54 also has R, G, B filter elements, but the first color filter 5
Unlike 3, the R, G, and B filter elements extend along the longitudinal direction of the line sensor 44 (see FIG. 3).

FIG. 7 is a diagram showing the structure of the electro-developing recording medium 30, which is the same as that disclosed in Japanese Patent Laid-Open No. 5-2280. That is, the electro-developing recording medium 3
Reference numeral 0 includes an electrostatic information recording medium 31 and a charge holding medium 32, and a voltage is applied to the electrostatic information recording medium 31 and the charge holding medium 32 by a power supply 33. Electrostatic information recording medium 31
Is formed by laminating a substrate 34, an electrode layer 35, an inorganic oxide layer 36, and a photoconductive layer 37, and the photoconductive layer 37 is formed by polymerizing a charge generation layer 37a and a charge transport layer 37b. The charge holding medium 32 is configured by enclosing the liquid crystal 40 between the liquid crystal support 38 and the liquid crystal electrode layer 39. The charge transport layer 37b of the electrostatic information recording medium 31 and the liquid crystal support 38 of the charge holding medium 32 face each other with a minute gap.

The power supply 33 is on / off controlled by the recording medium drive circuit 41. When the power supply 33 is in the on state, the electrode layer 3
5 and the liquid crystal electrode layer 39, that is, the electrostatic information recording medium 3
A voltage is applied to 1 and the charge holding medium 32. When the electrostatic information recording medium 31 is exposed in this voltage applied state, charges are generated on the electrostatic information recording medium 31 according to the image. Since the strength of the electric field acting on the liquid crystal 40 changes according to this charge, the image is displayed on the liquid crystal 40 as a visible image, and the subject image is developed. The charge holding medium 32 is a liquid crystal display element using a memory type liquid crystal, and the developed visible image is held even if the electric field is removed. A liquid crystal display element using a memory type liquid crystal can also erase a developed visible image by heating it to a predetermined temperature using a heating device (not shown), in which case the same recording is repeated. A medium can also be used.

FIG. 8 is a timing chart showing an operation of recording an image on the electro-developing recording medium 30 and an operation of reading the image. 9 is a flowchart of a program for executing the recording operation, and FIGS. 10 to 12 are flowcharts of a program for executing the reading operation.

The program of the recording operation starts when the release switch 14 is turned on (reference S).
11). In step 101, the output signal from the photometric sensor 28, that is, the photometric value is detected, and in step 102,
The exposure calculation is started based on this photometric value (reference S1).
2). After a lapse of a predetermined time from the release switch 14 being turned on, a recording medium activation signal is output in step 103 (reference S13), whereby the power supply 33 is turned on and the electrostatic information recording medium 31 is discharged. A voltage is applied to the charge holding medium 32. When it is confirmed that the exposure calculation is completed in step 104 (reference numeral S1)
4) According to the calculation result, the recording operation is performed in step 105 and subsequent steps.

In step 105, the quick return mirror 21 changes from the down state to the up state (reference S16). When it is confirmed in step 106 that the change of the mirror 21 to the up state is completed, the shutter 22 is opened in step 107 (reference S1).
7). When the exposure period obtained by the exposure calculation has elapsed and the completion of exposure is detected in step 108, the shutter 22 is closed in step 109 (reference S18). Upon completion of the closing operation of the shutter 22, step 110 is executed and the mirror 21 is changed to the down state (reference S19). In step 111, the output of the recording medium activation signal is stopped (reference S21).

That is, the recording medium activation signal is output at least while the shutter 22 is open, and during this period, a predetermined voltage is applied to the electro-developing recording medium 30. Then, by exposing in this state, the subject image is developed as a visible image on the electro-developing recording medium 30. This visible image is retained even when the output of the recording medium activation signal is stopped.

When it is confirmed in step 112 that the mirror 21 has returned to the initial state, step 113
At, the drive of the mirror 21 is stopped, and the program of the recording operation ends.

The program for the read operation starts when the scanner switch 16 is turned on (reference S3).
1). In step 201, the illumination light source 42 is turned on (reference S32), and in step 202, the power supply for driving the line sensor 44 is set to the on state (reference S3).
3).

In step 203, the counter COUNT is set to 1. In step 204, the counter COU
When NT is 1, the parameter WB is set to R, when the counter COUNT is 2, the parameter WB is set to G, and when the counter COUNT is 3, the parameter WB is set to B.
Stipulated in. That is, the value of the counter COUNT corresponds to the R, G, and B color components in white balance adjustment.

In step 205, a recording medium drive signal is output (reference S34), whereby the transfer motor rotates in the forward direction and the electro-developing recording medium 30 starts moving in the direction of arrow A in FIG. When it is confirmed in step 207 that the data area 30b of the electro-developing recording medium 30 is set at the white balance information reading position, that is, the position corresponding to the line sensor 44, the recording medium drive signal is output in step 208. Then, the transfer of the electro-developing recording medium 30 is stopped (reference S35). This stopping of the transfer is controlled by counting the pulses for driving the transfer motor. When step 208 is executed for the first time, the counter COUNT is 1 and the data area 30b
Of these, the electro-developing recording medium 30 is stopped with a portion of the second color filter 54 corresponding to the R filter element facing the line sensor 44.

In step 209, the exposure to the line sensor 44 is started and the charge is stored (reference S3).
6). When it is confirmed in step 210 that the exposure of the line sensor 44 is completed (reference S37), in step 211, the image signal corresponding to the exposure amount of R formed in the data area 30b is read from the line sensor 44. (S38). In step 212,
When it is confirmed that the image signal for one line corresponding to the longitudinal direction of the data area 30b is read from the line sensor 44, the read operation of the line sensor 44 is stopped in step 213 (reference S39). The average value of one line of this image signal corresponds to the R exposure amount at the time of shooting. The termination of the read operation is controlled by counting the pulse signals for driving the line sensor 44 output from the line sensor drive circuit 47, for example.

In step 214, the counter COUNT is incremented by 1. When it is determined in step 215 that the value of the counter COUNT is 3 or less, the process returns to step 204 and the above-described processing is executed. That is, when the counter COUT is set to 2, the electro-developing recording medium 30 stops with the portion corresponding to the G filter element facing the line sensor 44 (reference symbols S41 and S42), and in this state, The charge is accumulated (reference S43), and the image signal corresponding to the G exposure amount is read (reference S44). When the counter COUT is set to 3, the electro-developing recording medium 30 stops with the portion corresponding to the B filter element facing the line sensor 44 (references S45, S46), and in this state,
The charge is accumulated (reference S47), and the image signal corresponding to the exposure amount of B is read out (reference S48).

In this way, the image signal corresponding to the exposure amount of R, G, B, that is, the information necessary for the white balance adjustment is read out, and in step 215 the counter C is read.
If it is determined that OUNT exceeds 3, step 22
Below 1, the image recorded in the image recording area 30a of the electro-developing recording medium 30 is read.

In step 221, the transfer motor rotates in the normal direction and the electro-developing recording medium 30 starts to move in the direction of arrow A in FIG. 3 (reference S51). In step 222, R,
Based on the image signals corresponding to the transmittances of the G and B regions, the read gains of the R and B images, that is, G / R and G
/ B is calculated. That is, regarding the read gain, the gain of the color component having a large exposure amount is small and the gain of the color component having a small exposure amount is large, and the color temperature balance is adjusted with reference to the G component.

At step 223, it is judged whether or not the reading start position of the image recorded on the electro-developing recording medium 30 is set at a position facing the line sensor 44. This is the most data area 30 of the image recording area 30a.
The end portion close to b is in a state of facing the line sensor 44. When it is confirmed that the read start position is opposed to the line sensor 44, the process proceeds from step 223 to step 224, the electro-developing recording medium 30 is stopped (reference S52), and the line sensor 44 is operated at step 225. Exposure is started and charge is stored (reference S53). In step 226, the line sensor 4 is detected by detecting that a certain period of time has passed, for example.
When it is confirmed that the exposure of Step 4 is completed, Step 22
At 7, the read operation of the line sensor 44 is started (reference S54). In step 228, a drive signal for rotating the transfer motor in the forward direction is output, and the electro-developing recording medium 30 starts to move further.

The reading operation of the line sensor 44 is performed for each line extending in the vertical direction in FIG. Therefore, the pixel signal is transmitted from the line sensor 44 by G, B,
G, B ,. ． ． Or R, G, R, G ,. ． ． Are output in this order.

When the completion of the reading operation is not confirmed in step 229 while the electro-developing recording medium 30 is moving, in step 251, the gain corresponding to the color of the pixel signal output from the line sensor 44 is selected. .
That is, when the R pixel signal is output, the gain (G / R) is selected, when the G pixel signal is output, the gain (1) is selected, and when the B pixel signal is output. Gain (G / B) is selected. Then, in step 252, the pixel signal is multiplied by the selected gain and stored in memory 64. That is, the memory 64 stores the pixel signal whose white balance has been adjusted. In step 231, it is determined whether the line sensor 44 is set at the position of the next line, that is, at the next read position. If the line sensor 44 is not set at the position of the next line, the process returns to step 229.

On the other hand, when it is confirmed in step 229 that the reading operation of the line sensor 44 is completed, the reading operation is stopped in step 230 and the memory 6 is read.
After the storage in 4 is completed, step 231 is executed.

In step 231, the line sensor 44
When it is confirmed that is set to the position of the next line,
In step 232, the movement of the electro-developing recording medium 30 is stopped (reference S55). In step 233, it is confirmed that the reading operation of the line sensor 44 is completed, as in step 229. When the completion of the read operation is not confirmed in step 233, step 253 is executed and the gain corresponding to the color of the pixel signal is selected. Then, in step 254, the pixel signal is multiplied by the selected gain and stored in the memory 64, and step 233 is executed again. When the completion of the read operation is confirmed in step 233, the process proceeds to step 234, and the read operation and the storage operation in the memory 64 are stopped.

In this way, steps 229, 230, 231, 251, 25 are executed without executing step 230.
Even when the loop 2 is exited, the reading operation of the line sensor 44 is ended in step 234.

At step 235, it is judged whether the read operation for all lines is completed. The number of all the lines is, for example, 2000. For example, a counter that is incremented in step 232 is provided, and the value of this counter is determined. If the reading of all lines has not been completed, the process returns to step 225, and steps 225 to 235 described above are executed again.

When the reading of all lines is completed, the process moves from step 235 to step 236, and the line sensor 44
The driving power source is switched to the OFF state, and the illumination light source 42 is turned off in step 237. In step 238, the pixel signal stored in the memory 64 is subjected to image processing such as image compression and recorded on a recording medium attached to the image recording device 67. In step 239,
The transfer motor is driven to transfer the electro-developing recording medium 30 to the slot side of the camera body 11. Step 240
When it is confirmed that the electro-developing recording medium 30 has been ejected to the outside of the camera body 11 at step 241, the transfer motor is stopped at step 241, and this program ends.

As described above, in this embodiment, the information necessary for the white balance adjustment is recorded in the data area 30b of the electro-developing recording medium 30 as optical information. When the color image recorded on the electro-developing recording medium 30 is read by the line sensor 44, the optical information (R,
(G and B white balance information) is read out, and white balance adjustment gains G / R and G / B are calculated.
These gains are multiplied by each pixel signal when the pixel signal of each line forming the image signal is stored in the memory 64. Therefore, a circuit such as a white balance signal processing circuit for performing white balance adjustment is not required inside the camera body 11, and the circuit configuration inside the camera body 11 can be simplified.

Further, in this embodiment, the color image recorded in the image recording area 30a is read after the optical information for white balance adjustment is read, so that the image is recorded on the recording medium in the image recording apparatus. It is not necessary to perform a complicated process of re-adjusting the white balance after the read image is read.

The electro-developing recording medium 30 is not limited to the one having the above-mentioned structure, and may have any other structure as long as it electronically develops an image.

[0055]

As described above, according to the present invention, an image of an appropriate color can be obtained by adjusting the white balance according to the exposure amount of the light of each color component incident on the electro-developing recording medium. it can.

[Brief description of drawings]

FIG. 1 is an external view of a still video camera to which an embodiment of the present invention is applied.

FIG. 2 is a block diagram showing a circuit configuration of the still video camera shown in FIG.

FIG. 3 is a perspective view showing a configuration near a portion where an electro-developing recording medium is arranged.

FIG. 4 is a plan view showing a configuration in the vicinity of a portion where an electro-developing recording medium is arranged.

FIG. 5 is a front view showing an arrangement of first and second color filters on a mask member.

FIG. 6 is a diagram showing an array of filter elements of first and second color filters.

FIG. 7 is a diagram showing a configuration of an electro-developing recording medium.

FIG. 8 is an operation of recording an image on an electro-developing recording medium,
It is a timing chart which shows operation which reads this image.

FIG. 9 is a flowchart of a program that executes a recording operation.

FIG. 10 is a flowchart of a program that executes a read operation.

FIG. 11 is a flowchart of a program that executes a read operation.

FIG. 12 is a flowchart of a program that executes a read operation.

FIG. 13 is a flowchart of a program that executes a read operation.

[Explanation of symbols]

30 electro-developing recording medium 30a image recording area 30b data area

─────────────────────────────────────────────────── ─── Continued Front Page (51) Int.Cl. ⁷ Identification Code FI H04N 5/225 H04N 5/225 Z 5/238 5/238 Z 9/73 9/73 A

Claims (8)

(57) [Claims] 1. An electrostatic information recording medium according to an image
Depending on the charge generated, a visible image will appear on the charge retentive medium.
An electro-developing recording medium capable of generating and holding this visible image, an image recording area for recording the color image, and a light of a predetermined color component provided outside the image recording area. An electro-developing recording medium having a data area for recording optical information corresponding to an exposure amount. 2. The electro-developing recording medium according to claim 1, wherein the predetermined color components are red, green and blue. 3. The liquid crystal display device, wherein the charge holding medium is a memory type liquid crystal display device.
An electro-developing recording medium according to item 1. 4. Recording an electronically developed color image.
Image recording area for recording
And optical information corresponding to the exposure amount of light of a predetermined color component
A white balance adjusting device for an electro-developing camera using an electro-developing recording medium having a data area for recording a color of a predetermined color component provided at a position corresponding to the image recording area. A first color filter having a filter element, a second color filter provided at a position corresponding to the data area and having a color filter element of a predetermined color component, and a position corresponding to the second color filter. A white balance adjusting device for an electro-developing camera, comprising: a diffuser plate provided so as to make the illuminance of light guided to the data area uniform in the data area. 5. The contract according to claim 1, wherein the color components of the first color filter are red, green and blue.
The white balance adjusting device for an electro-developing camera according to claim 4 . 6. The contract according to claim 2, wherein the color components of the second color filter are red, green and blue.
The white balance adjusting device for an electro-developing camera according to claim 4 . 7. A line sensor for reading an image recorded on the electro-developing recording medium, and a line sensor based on optical information read by the line sensor and recorded in the data area. 5. The white balance adjusting device for an electronic development type camera according to claim 4 , further comprising an adjusting means for adjusting a gain of the image signal. Wherein said line sensor, after reading the optical information recorded in the data area, claims, characterized in that for reading a color image recorded on the image area
7. The white balance adjusting device for an electro-developing camera described in 7 .