JP2002165761A - Fundus camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a means for easily obtaining a photographic image in a color tone expected by an observer with less retaking troubles. SOLUTION: This fundus camera is equipped with a photographic optical system having a means for taking photoelectrical pictures of the fundus of a subject eye irradiated with the photographic lighting source, an image storage means to memorize the photographed images taken by the above photographic means, a monitor to display the photographed images, a means for changing image color tones to be displayed on the above monitor and a means for correcting the color tone of the photographed images to be memorized by the above image storage means at the time of newly taking pictures based on the color tone correction data by the above means for changing the color tone.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fundus camera for photographing a fundus of a subject's eye.

[0002]

2. Description of the Related Art There is known a fundus camera configured to take a color photograph of a fundus of a subject's eye by electronic image pickup means and display the photographed image on a monitor. In a fundus camera,
Necessary information differs depending on the observation site and observation purpose.
An image having a color tone from which the information can be obtained is desired. In addition, it is required that a photographer (observer) displays an image having a color tone that is easy to diagnose.

As a method of correcting the color tone of a photographed image itself, there are a method of inserting a filter into a photographing system or an illumination system, and a method of using a color tone correction function of electronic image pickup means.

[0004]

However, in the case of a method of inserting a filter, since the color tone of a photographed image depends on both the filter and the photographing optical system, selection of an appropriate filter and photographing for the expected adjustment are performed. Rework is required many times, which is troublesome. Even when the color tone correction function of the electronic image pickup means is used, a color tone as expected can be determined only by looking at a corrected captured image, and the number of times of re-shooting also increases.

[0005] In addition, since a photographed image of an expected color tone varies depending on a photographer or a photographed part, it is not easy to cope with such a case.

An object of the present invention is to provide a fundus camera capable of easily obtaining a photographed image having a color tone expected by an observer by reducing re-photographing.

[0007]

Means for Solving the Problems In order to solve the above problems, the present invention is characterized by having the following configuration.

(1) A fundus camera for photographing the fundus of the eye to be examined, a photographing optical system having an image pickup means for photoelectrically photographing the fundus of the eye to be examined illuminated by a photographing illumination light source, and an image photographed by the image pickup means is stored. Image storage means, a monitor for displaying a photographed image, a display color tone changing means for changing the color tone of the image displayed on the monitor, and a new photographing operation based on the color tone change data by the display color tone changing means. A photographing color correcting unit for correcting a color tone of a photographed image stored in the image storing unit at times.

(2) The photographic color correction means of (1) is imaging control means for controlling so as to correct a color signal of an image output from the imaging means based on the color tone change data. I do.

(3) The photographic color correction means of (1) is an illumination control means for controlling the amount of illumination by the photographic light source based on the color tone change data.

(4) The fundus camera according to (1), further comprising a filter arranging means having a plurality of color filters and selectively arranging the color filters in a photographing optical path or an illuminating optical path, wherein the photographing color correcting means comprises the color tone changing means. The image processing apparatus further includes means for selecting a color filter to be arranged in the optical path based on the data, and controlling the amount of illumination by the imaging light source.

(5) In the fundus camera according to (1), further, color tone change data storage means for storing a plurality of the color tone change data, and the color tone change data stored in the color tone change data storage means are selectively called. The image processing apparatus further includes data calling means, wherein the photographing color correcting means corrects the color tone of the photographed image based on the called color tone change data.

(6) In the fundus camera according to (1), color tone correction data input means for inputting color tone correction data for correcting the color tone of an image displayed on the monitor, and storage in the image storage means. Storage means for storing the captured image and storing the input color tone correction data in association with the captured image data, and redisplay means for redisplaying the captured image stored in the storage means on the monitor. And redisplay means for reproducing the color tone correction based on the color tone correction data at the time of redisplay.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic diagram of an optical system of a non-mydriatic retinal camera according to a first embodiment. The optical system is roughly divided into an illumination optical system 1, a photographing optical system 2, and an observation optical system 3.

<Illumination Optical System> A light beam emitted from a halogen lamp 10 serving as an observation light source is
After passing through the condenser lens 12, the light is reflected by the half mirror 15, and is reflected by the ring slit 1.
Illuminate 6. A visible light beam emitted from a flash lamp 13 serving as a photographing light source is
After passing through 4, the light passes through the half mirror 15 and is coaxially synthesized with the infrared light beam for observation, and illuminates the ring slit 16.

The light beam from the ring slit 16 forms an intermediate image near the opening of the perforated mirror 21 via the relay lens 17a, the mirror 18, the black spot plate 19, and the relay lens 17b. The light is reflected on the peripheral surface of the perforated mirror 21 so as to be coaxial with the axis. Perforated mirror 2
The ring slit light beam reflected by 1 once forms an image near the pupil of the eye E by the objective lens 20 and then diffuses to uniformly illuminate the fundus of the eye.

<Shooting Optical System> The shooting optical system 2 includes an objective lens 20, a shooting aperture 22, a filter 23 for cutting harmful light such as flare, a focusing lens 24 movable in the optical axis direction, an imaging lens 25, and a dichroic lens. The camera includes a mirror 26 and a camera unit 27 having a color CCD camera for photographing a still image. RG from camera unit 27
The B color digital image signal is output. The dichroic mirror 26 has a characteristic of reflecting infrared light and transmitting visible light. The reflected light flux from the fundus is once formed into an intermediate image of the fundus by the objective lens 20 and then the perforated mirror 21
, An imaging aperture 22, a filter 23, a focusing lens 24, an imaging lens 25, and a dichroic mirror 26, and then enter a CCD camera of a camera unit 27 to form a fundus image on the image sensor surface.

<Observation Optical System> The observation optical system 3 is connected to the dichroic mirror 26 from the objective lens 20 of the imaging optical system 2.
The dichroic mirror 26 branches the optical path of the infrared light. The infrared reflected light flux from the fundus reflected by the dichroic mirror 26 is transmitted through the relay lens 30 and then reflected by the mirror 31 to be incident on the observation CCD camera 32 having sensitivity in the infrared region. To form a fundus image.

FIG. 2 is a block diagram of the control system. A digital image signal from the camera unit 27 for photographing is input to a temporary storage unit 51, and an image processing unit 52 that performs image processing such as color tone correction, and a color monitor 60 via an image switching unit 53.
Is output to The image switching unit 53 switches the display on the color monitor 60 to a moving image observed by the observation camera 32, a still image from the camera unit 27, or the like. Reference numeral 50 denotes a control unit for the entire fundus camera, and the camera unit 27 and the temporary storage unit 5
1. Image processing unit 52, image switching unit 53, flash lamp dimming unit 57, data storage unit 55, memory 56 such as data rewritable E ² PROM, external computer 7.
USB for data communication (data transmission / reception) with 0
An interface 58 and a photographing switch 59 are connected.

The input unit 61 includes a switch group 62 which performs different switch functions corresponding to the display on the monitor 60, a lever 63 for inputting an operation signal for moving a cursor or the like on the monitor 60, a ten key 64, a light amount adjusting knob. 65a, a focus knob 65b and the like are provided.

The external computer 70 has an image storage 71
, An image processing unit 72, a control unit 73, a monitor 74 for displaying images, and input means 75 such as a keyboard and a mouse.

Next, the operation of this embodiment will be described. Hereinafter, a case where the color tone of the captured image (original image) to be filed itself is corrected and a case where the captured image is further corrected in color tone by the display system and observed will be described.

<Color Correction of Photographed Image (Original Image) itself> A photographing mode is selected by a mode switch 61a provided in a switch group 62. The operation mode of the device is monitored by the monitor 60.
Will be displayed. In the shooting mode, the halogen lamp 1
0 is turned on, and the eye E is illuminated with infrared light. The image of the subject's eye illuminated with infrared light is a CCD camera 3
2 and the image is displayed on the monitor 60. The photographer observes the display on the monitor 60 and adjusts the position of the fundus camera device with respect to the eye to be inspected and performs focusing by moving the focusing lens 24. In addition, the eye E to be inspected is gazed at a fixation lamp (not shown), and the photographic position is determined by guiding the line of sight of the eye to be inspected.

When the photographing position is determined, the photographing switch 59 is pressed to execute photographing. The control unit 50 supplies a drive signal to the light control unit 57 to cause the flash lamp 13 to emit light so as to have a set light amount. The light amount at this time is set by the light amount adjustment knob 65a. The fundus image is photographed by the camera unit 27 in synchronization with the emission of the flash lamp 13, and the obtained fundus image is stored in the temporary storage unit 51.

When a photographed image is obtained, the mode is switched from the photographing mode to the image reproducing mode under the control of the control unit 50, and the image stored in the temporary storage unit 51 is displayed on the monitor 60. The photographer observes the displayed image, and if the original image to be filed is corrected to a desired color tone, the mode switch 6
After setting the environment setting mode screen in 1a, the F3 switch 62d is pressed on this screen to switch to a screen for correcting the color tone of the original image.

FIG. 3 is an example of a screen for setting color tone correction of an original image. On the left side of the screen, parameter change items 110 to 113 for color tone correction are set at positions corresponding to the switches 62a to 62e.
Is displayed. When the red component adjustment item 110 is selected by the F1 switch 62b, the cursor 101 appears in the left parenthesis. The left parenthesis of the item 110 is a column for inputting the value of the change ratio of the color balance based on green, and
4 is used to input a changed value. When the lever 63 is tilted to the right, the cursor 101 moves into the right parenthesis. The right parenthesis is a field for inputting a brightness offset value, and a numerical value is similarly input using the ten keys 64. F1 switch 62 again
When b is pressed, the color of the fundus image 100 displayed on the monitor 60 is changed by the color correction processing of the image processing unit 52 according to the input value.

When the user selects the blue component adjustment item 111 by pressing the F2 switch 62c, the cursor 10
Since 1 is displayed, the ratio of the color balance in the blue component can be changed by the left parenthesis, and the brightness offset value can be changed by the right parenthesis. When an item 112 for changing the overall brightness (contrast) is selected by the F3 switch 62d, a cursor 101 is displayed at the left parenthesis of the item. In the left parenthesis, enter a value to change the ratio of the overall brightness. Lever 63
By moving the cursor 101 to the right parenthesis, the offset amount can be changed.

As described above, the parameter change items 110 to 112 are selected by the F1 switch 62b to the F3 switch 62d, and the switches are pressed again, so that the image processing unit 52 stores them in the temporary storage unit 51 in accordance with the change values of the parameters. The RGB luminance signal for the captured image data thus obtained is increased or decreased, and the color tone of the fundus image 100 on the monitor 60 is changed. The F4 switch 62e is a switch for selecting the item 113 for returning the color correction to the default value. When this switch is pressed, the value in the left parenthesis of each parameter becomes 1.0, and the value in the right parenthesis becomes 0. , Temporary storage unit 51
Is returned to the image (reference color tone) stored in. Note that a gamma correction item may be further added as a color correction parameter change item.

When the image displayed on the monitor 60 has a desired color tone as described above, the photographer presses the mode switch 61a to return to the environment setting mode screen, thereby confirming the color change. Thereby, the control unit 50 sets the photographed image at the time of the next execution of the new photographing according to the color change data so that the photographed image has substantially the same color tone as the color tone corrected on the screen of FIG.
Give feedback to the shooting system. The color change of a captured image at the time of a new image capture is performed by the following two methods.

The first method is to change the photographing conditions. That is, on the screen of FIG.
When the value 2 (the value in the left parenthesis) is changed, the control unit 50 changes the light amount at the time of shooting (the flash lamp 13) according to the changed value.
Is calculated, and the photographing light amount is adjusted at the time of new photographing. Note that the correction coefficient of the photographing light amount is determined as follows. In the apparatus configuration stage, images in which the amount of photographing light is variously changed are obtained in advance, and the correspondence between the color of each image and the color when the brightness on the monitor 60 is sequentially changed is determined. Table control unit 5
0 is stored in the storage circuit of 0 in advance. When the brightness is changed, the control unit 50 reads a correction coefficient for the changed value of the brightness from the table and determines the correction coefficient.

The second method is a method in which the color signal is changed while the photographed image signal is sent from the camera unit 27 to the temporary storage unit 51. When the red component, the blue component, and each offset component are changed on the screen of FIG. 3, the RGB correction coefficients are stored in the memory 56, and the control unit 50 controls the color correction function of the camera unit 27, and , The RGB color signal itself output from the camera unit 27 is corrected. This is the camera unit 27
Similarly, before the color signals output from are stored in the temporary storage unit 51, the RGB color signals are also corrected.

After confirming the color correction data on the monitor 60, the mode is switched to the photographing mode, the photographing position is determined in the same manner as described above, and the photographing switch 59 is pressed to execute photographing. . At this time, the light emission amount of the flash lamp 13 is controlled by the control unit 50 via the light control unit 57 based on the correction coefficient of the photographing light amount. Also, the RGB output from the camera unit 27
The color signal of the image signal is stored in the RG stored in the memory 56.
It is controlled by the control unit 50 based on the B correction coefficient.
Thus, the captured image data stored in the temporary storage unit 51 becomes almost the same as the color tone confirmed on the monitor 60 in advance. Since the original image stored in the temporary storage unit 51 is displayed on the monitor 60, the photographer checks whether or not the photographed image has a desired color tone.
Open the color tone correction screen and adjust in the same way.

After confirming in advance the image whose color tone has been corrected on the monitor 60 as described above, the correction data is reflected at the time of photographing, so that re-photographing is reduced, and a photographed image having the expected color tone ( Original image) can be easily obtained.

A photographed image having an expected color tone varies depending on a photographer or a photographed part. In such a case, the light amount and the correction coefficient of the RGB signal at the time of the previous photographing are stored, and the one corresponding to the photographer or the part to be photographed is called from among them. The call can be made as follows.

First, the original image data photographed as described above is stored in the data storage unit 55. When performing this storage, the mode switch 61a is pressed to open the ID input screen, and the ID number for identifying the subject and the photographed image is input using the ten keys 64 (the ID number can also be input before the photographing is executed). ). Thereafter, by pressing the F4 switch 62e indicating image storage in the image reproduction display, the original image data stored in the temporary storage unit 51 is given an ID number and stored in the data storage unit 55. At this time, the memory 56
The light amount correction coefficient and the correction coefficient of the RGB signal stored in the original image data are stored together with the original image data (see FIG. 4).

Next, the image data thus stored is called once. FIG. 5 is a file list screen for calling the original image data stored in the data storage unit 55. This screen is selected and called by the mode switch 62a. In this screen display, after moving the cursor 120 by moving the lever 63 up and down to specify the image data, and pressing the F1 switch 62b indicating loading, the original image data specified from the data storage unit 55 is temporarily stored. The original image is transferred to the storage unit 51, and the original image is displayed on the monitor 60. R attached at the same time corresponding to the original image data
Data of a color tone correction coefficient such as a GB image signal is called,
Once stored in the memory 56. In this way, by reproducing the previous photographed image, the color tone correction coefficient at the time of the photographing is called at the same time. Thereafter, by switching to the photographing mode and performing photographing, the light emission amount of the flash lamp 13 and the color tone balance of the RGB image signal output from the camera unit 27 are controlled based on the color tone correction coefficient stored in the memory 56. You. Thus, the previous color tone correction state can be easily reproduced.

It should be noted that the change of the first photographing condition described above
The present invention is also applicable to a configuration in which a color filter is inserted into an optical path of a photographing optical system or an illumination optical system. FIG. 8 is a diagram showing an example of the optical system (the same elements as those in FIG. 1 are denoted by the same reference numerals). A disc plate 40 is provided with a plurality of various color filters 41 and a motor 42. , The color filter 41 is selectively arranged on the photographing optical path. At the time of new photographing, the control unit 50 selectively arranges a color filter that becomes a recent color according to the RGB correction coefficient changed on the screen of FIG. 3 and flashes according to the correction coefficient of the photographing light amount. The light amount of the lamp 13 is controlled.

The first photographing condition is changed by a red filter, a blue filter, and a green filter (these are color filters 4).
(Included in 1) is particularly convenient. That is, when applying red, blue, and green color filters, it is difficult to set the amount of photographing light to obtain the expected brightness. However, as described above, the color and brightness are adjusted on the monitor 60 in advance, and this information is set. Is reflected in the light amount adjustment at the time of photographing, so that an image having the expected brightness can be obtained without trouble without re-taking the photographing many times.

<Color Tone Correction in Display System>
Further, a case where the color tone is corrected in the display system will be described. This is used for fine adjustment of a portion of the photographed image itself that cannot be completely corrected by the color tone correction, and when temporarily correcting only the displayed image.

When a photographed image is obtained by performing photographing,
The mode is switched from the shooting mode to the image reproduction mode under the control of the control unit 50, and the image stored in the temporary storage unit 51 is displayed on the monitor 60. When the photographer (or observer) changes the image displayed on the monitor 60 to a color tone that is easier to diagnose, the user sets the environment setting mode with the mode switch 61a or the like and selects a color tone correction screen for display from the environment setting mode. .

FIG. 6 shows an example of a color tone correction screen for display.
The parameter change items for color tone correction displayed on the left side of the screen are the same as those in FIG. The photographer operates the switch 62 as in the case of FIG.
b-Select the color correction parameter to be changed by moving the switch 62d and the cursor 101, and input the changed value using the numeric keypad -64. By changing the value of each item, the color of the fundus image 100 displayed on the monitor 60 is changed by the color correction processing of the image processing unit 52.

Temporary storage unit 5 stores color correction parameters for display.
When the image data is stored in the data storage unit 55 together with the original image data stored in 1, the ID number is input on the ID input screen, and the image storage switch is pressed. The color correction parameters for display are transferred from the image processing unit 52 to the data storage unit 55 under the control of the control unit 50, and are attached to the original image data and stored (see FIG. 7).

After the color of the fundus oculi image 100 on the monitor 60 is adjusted to a desired color tone, the mode switch 61a is pressed to exit the color tone correction screen, so that the input color correction parameters are stored in the memory 56. Then, when photographing is subsequently performed, the color correction parameters for display stored in the memory 56 are transferred to the image processing unit 52,
An image obtained by performing color correction on the captured image (original image) stored in the temporary storage unit 51 based on the color correction parameters is displayed on the monitor 60. Thus, the photographer can observe an image on which the same color correction processing as that of the previous display image has been performed, without performing a color correction operation for display each time a photograph is taken.

The case where the image stored in the data storage unit 55 is reproduced and displayed on the monitor 60 will be described. When a file screen (a screen similar to FIG. 5) is opened by the mode switch 61a, a list of ID numbers is displayed, and a desired one is selected from the list and called. In response to the call instruction, the original image data is transferred from the data storage unit 55 to the temporary storage unit 51, and the color correction parameters for display attached to the original image data are transferred to the image processing unit 52. Then, by the color correction processing of the image processing unit 52, an image color-corrected based on the color correction parameters is displayed on the monitor 60. This allows the observer to observe the previously color-corrected image. When it is desired to return the display on the monitor 60 from the color-corrected image to the original image, if the F4 switch 62e is pressed on the screen shown in FIG. 6, the image is immediately converted to the original image and displayed.

The case where an image is displayed on the monitor 74 of the external computer 70 will be described. The observer also opens the file screen and selects an image by ID number,
By pressing the F3 switch 62d meaning image transfer, a transfer instruction is input. The selected image is accompanied by color correction parameters for display and other accompanying data (ID
Number, and the like, via the USB interface 58 to the image storage 71 of the external computer 70.
On the external computer 70 side, the transferred image is called by designating the ID number by the input means 75. At this time, since color correction parameters for display are attached to the original image data, the image processing unit 72 performs the same color correction processing as that of the retinal camera body using the color correction parameters, so that the monitor 60 An image having the same color tone as the displayed image is displayed on the monitor 74.

When the external computer 70 performs analysis in various diagnoses, the image storage 71 stores the photographed original image data as it is, so that the color information resulting from the color tone correction for display is stored. Analysis using original color information of the image data can be performed while preventing loss.

Further, it is possible to easily observe other original image data in the same color tone by using the color correction parameters attached to the original image data. In other words, the display color correction parameters attached to the original image data are called,
Color correction processing is performed by the image processing unit 72 using the called color correction parameters for other original images photographed at different times or the like, and is displayed on the monitor 74. An instruction to call out color correction parameters and an instruction to process an image are made by the input unit 75. As a result, images in the state where the same color correction has been performed on different images can be observed on the monitor 74, which can be useful for diagnosis.

This can be displayed and observed on the monitor 60 of the retinal camera apparatus in the same manner. Further, it is possible to perform the same color correction as that of the previous image on the image at the time of executing the photographing. For example, when it is desired to display on the monitor 60 an image that has been subjected to the same color tone correction as an image previously captured during follow-up observation or the like, the previously captured image is once called from the data storage unit 55. Then, similarly to the setting of the color correction, the environment setting mode is set by the mode switch 61a or the like, and the color tone correction screen for display (FIG. 6) is selected from the environment setting mode. Since the screen at this time contains the color correction parameters of the called image, the color correction parameters are stored in the memory 56 by pressing the mode switch 61a and leaving the color tone correction screen. When shooting is performed in the shooting mode, the memory 56
The image processing unit 52 performs color correction processing based on the display color correction parameters stored in the monitor 6.
At 0, an image that has been subjected to the same color tone correction as the previously captured image is displayed. Once the color correction data for display is set in this way, without performing the color correction input operation for each shooting,
The photographed image can be observed on the monitor 60 in a color tone desired by the observer.

[0050]

As described above, according to the present invention,
It is possible to easily obtain a photographed image having the expected color tone (including brightness) with less re-taking. Further, since the data of the color tone change at the time of photographing can be called before, a photographed image with the same color tone setting as before can be easily obtained. Furthermore, since the color tone can be changed only in the display system, and the color tone change data for display is linked and saved together with the captured image, the display image having the same color tone as before can be maintained while maintaining the color tone of the captured image. Can be reproduced.

[Brief description of the drawings]

FIG. 1 is a diagram showing an optical system of a fundus camera according to the present invention.

FIG. 2 is a block diagram of a control system of the fundus camera.

FIG. 3 is a diagram illustrating an example of a screen for setting color tone correction of an original image.

FIG. 4 is a diagram showing that when the original image data is stored in the data storage unit, the light amount correction coefficient and the RGB correction coefficient are attached and stored.

FIG. 5 is a diagram showing an example of a file list screen when original image data is called.

FIG. 6 is a diagram showing an example of a color tone correction screen for display.

FIG. 7 is a diagram showing that, when original image data is stored in a data storage unit, a color correction parameter for display is attached and stored.

FIG. 8 is a diagram illustrating an optical system when a color filter is inserted into an optical path of a photographing optical system.

[Explanation of symbols]

 Reference Signs List 1 illumination optical system 2 photographing optical system 10 halogen lamp 27 camera unit 50 control unit 51 temporary storage unit 52 image processing unit 55 data storage unit 56 memory 60 monitor 110, 111, 112, 113 parameter change items

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) G06T 1/00 510 G06T 1/00 510 5C072 H04N 1/04 H04N 1/04 101 5C077 101 7/18 U 5C079 1/60 9/04 B 1/48 9/64 R 7/18 9/73 G 9/04 1/04 D 9/64 1/40 D 9/73 1/46 A F term (reference) 5B047 AA17 AB04 BB04 BC05 BC07 BC09 BC11 BC23 CA19 CB21 DC09 5B057 AA07 BA19 CA01 CA08 CA12 CA16 CB01 CB08 CB12 CB16 CC01 CE17 CH11 CH20 DB02 DB06 DB09 DC25 5C054 AA01 CA04 CA05 CC03 EA01 EA05 EA07 EE06 EE08 FB03 CC01 FE09 FF01 GC01 FE09 BB01 EE03 EE16 GG30 GG44 5C066 AA01 CA05 CA17 EA13 EC05 GA01 KE07 KM01 KM05 KM10 KM11 5C072 AA01 BA19 CA03 CA14 DA02 DA06 DA09 DA21 EA05 EA08 QA06 JA1 QA16 UA11 UA18 XA10 5C023 LL17 MM03 PP23 MM LB01 MA02 MA17 NA03 NA27 PA00

Claims (6)

[Claims] 1. A fundus camera for photographing a fundus of a subject's eye, a photographing optical system having a photographing means for photoelectrically photographing a fundus of the subject's eye illuminated by a photographing illumination light source, and an image photographed by the photographing means is stored. An image storage unit, a monitor for displaying a captured image, a display color tone changing unit for changing a color tone of an image displayed on the monitor, and a new image capturing mode based on the color tone change data by the display color tone changing unit. A photographing color correcting unit for correcting a color tone of a photographed image stored in the image storing unit. 2. The photographing color correction unit according to claim 1, wherein the photographing color correction unit is an imaging control unit that controls so as to correct a color signal of an image output from the imaging unit based on the color tone change data. Fundus camera. 3. The retinal camera according to claim 1, wherein the photographic color correction means is illumination control means for controlling an amount of illumination by the photographic light source based on the color tone change data. 4. The fundus camera according to claim 1, further comprising: a filter arranging unit having a plurality of color filters and selectively arranging the color filters in a photographing optical path or an illumination optical path, wherein the photographing color correction unit includes the color tone changing data. A fundus camera including means for selecting a color filter to be arranged in the optical path based on the image data and controlling the amount of illumination by the photographing light source. 5. The fundus camera according to claim 1, further comprising: a tone change data storage unit for storing a plurality of the tone change data; and data for selectively calling the tone change data stored in the tone change data storage unit. A fundus camera, further comprising a calling unit, wherein the photographing color correcting unit corrects the color tone of the photographed image based on the called color change data. 6. A fundus camera according to claim 1, further comprising: a color tone correction data input unit for inputting color tone correction data for correcting a color tone of an image displayed on said monitor; Storage means for storing the captured image data and storing the input color tone correction data in association with the captured image data, and redisplay means for redisplaying the captured image stored in the storage means on the monitor. A redisplay means for reproducing the color tone correction based on the color tone correction data at the time of redisplay.