JPH0690906A - Eyeground photographing device and medical color image processor - Google Patents

Abstract

PURPOSE:To obtain a distinct eyeground image being useful to a diagnosis by detecting a diopter in a photographing optical system, converting its diopter to the eyeground illuminating light quantity, and also, illuminating the eyeground, based on this illuminating light quantity. CONSTITUTION:An eyeground image is observed through a finder lens 11 by a photographer, and in the case its image forming position is shifted from a focusing screen 10, a position of a focus lens 5 is adjusted by a focus adjusting switch 14. The position of this focus lens 5 corresponds to a diopter of an eye E to be examined, therefore, in a control box 12, diopter information is converted to general eye axis length, and an appropriate light emission quantity of a light source 1 is determined. In such a state, when a photographing switch 15 is depressed, a spring-up mirror 7 is retreated to the outside of an optical path, the light source 1 is allowed to emit light by a luminous flux of the derived light emission quantity, an eyeground Er of the eye E to be examined is illuminated, and also, this eyeground image is formed on a film 8 through an objective lens 4, a focus lens 5, and a photographic lens 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fundus photographing apparatus and a medical color image processing apparatus.

[0002]

[Prior art]

(1) Conventionally, the fundus imaging apparatus always illuminates the fundus of the eye to be examined with a constant amount of light so that a photograph having an appropriate density can be obtained when the fundus of the eye to be examined having an average brightness is photographed. Is configured. Further, the conventional fundus imaging apparatus is configured to detect a part of the light reflected from the film surface and the fundus and illuminate the fundus until the amount of light reaches a certain amount.

(2) In addition, conventionally, a fundus color image is displayed in red, green,
When the so-called color image is decomposed into the three colors of blue, the band images decomposed into red, green and blue are respectively subjected to the image processing. Figure 16 shows its outline, red,
A digital filter process such as edge enhancement is applied to the original image that has been color-separated into green and blue and digitized into R1, G1, and B1 to create digital images R2, G2, and B2. This image is superimposed and displayed on a monitor via a D / A converter and is output as a color image.

For example, defocusing of the photographing operation of the fundus image,
When the fundus image is insufficient for diagnosis due to adverse effects of underexposure failure, lesions such as insufficient resolution due to cataract, etc., it is easy to overlook the fundus image, such as small hemorrhagic spots and new blood vessels. Emphasis on the features of the lesion is required. However, since the color tone of the fundus image is an important clue for diagnosis, it is necessary to save the color tone of the original image as it is, even if image processing such as enhancement is performed.

(3) Conventionally, in a fundus photographing apparatus, when recording an electronic image, a color television camera is used to photograph a color image, and a monochrome television camera is used to photograph a fluorescent image. .

(4) Conventionally, in the fundus photographing apparatus, when recording an electronic image or a color image, the recording mode is manually set to review, and photographing is performed while confirming the photographing result on the monitor, and fluorescence is recorded. When recording the image,
The recording mode is manually set to continuous shooting mode, and one frame is shot per second without checking the shooting result.

[0007]

However, in the above-mentioned conventional example (1), if an attempt is made to photograph the entire eye to be examined with a constant amount of light, an improperly exposed photograph is taken due to the difference in the fundus brightness of the eye to be examined. There is a drawback that it will end up.

Further, in the conventional example in which a sensor for detecting a part of the light reflected from the fundus is provided and the photographing light amount is controlled according to the detected light amount, flare is likely to be affected and the portion other than the flare is not exposed. Become suitable. Further, there is a drawback that the structure becomes complicated and the device becomes expensive.

In the above-mentioned conventional example (2), the band images decomposed into red (R), green (G), and blue (B) are processed independently, so that, for example, extraction of a specific portion, etc. This was not a problem when this image processing was performed as a pre-processing for, but in the processing that simply changes the appearance of the image, the R, G, and B values of each band image are independently determined. Therefore, the processed image often has a different color tone from the original image.

Finally, in the above-mentioned conventional example (3), there is the trouble of switching or reconnecting the television camera to a color or monochrome television camera depending on the type of image to be recorded: color image or fluorescent image.

Further, if the color television camera is used for monochromatic light photography such as fluorescence photography without the trouble of replacing the television camera, an unnatural emission fluorescence image is obtained because the image is taken through a specific color filter. The color may differ from the fluorescent image of the silver-lead film, which may hinder the diagnosis.

In (4), the manual switching is troublesome, and if the switching is forgotten, the second-time photographing cannot be performed, so that the photographing timing of the fluorescence photographing is missed.

A first object of the present invention is to provide a fundus photographing apparatus capable of obtaining a clear fundus image useful for diagnosis.

A second object is to provide a medical color image processing apparatus capable of obtaining a fundus image without impairing the color tone of the original image.

A third object of the present invention is to provide a fundus photographing apparatus capable of obtaining a fluorescent image without unnecessary coloring even if a color television camera is used.

A fourth object is to provide a fundus photographing apparatus which can surely achieve second-time photographing in fluorescence photographing.

[0017]

A fundus photographing apparatus according to a first aspect of the present invention for achieving the above object is a focusing adjusting means for focusing on an eye to be examined in a photographing optical system, and the photographing optical system. A detection means for detecting diopter, a conversion means for converting the diopter of the photographing optical system into a fundus illumination light amount, and an illumination means for illuminating the fundus with the illumination light amount determined by the conversion means. To do.

The fundus photographing apparatus according to the second aspect of the present invention includes an input unit for inputting the axial length of the eye to be examined, a converting unit for converting the axial length input by the input unit into a fundus illumination light amount, and the converting unit. And an illuminating unit that illuminates the fundus with the illumination light amount determined in (3).

In the medical color image processing apparatus according to the third aspect of the invention, when processing multi-band images color-separated in different wavelength ranges, the color-separated multi-band images are multiplied by a predetermined coefficient and then added. By means of which a brightness image of each original image is created, second means for performing various processing on the brightness image to create an intermediate image, and a brightness ratio image from the ratio of the intermediate image to the brightness image And a processing means including a fourth means for taking a product of each of the band images and the lightness ratio image and producing a final image. .

The medical color image processing apparatus according to the fourth aspect of the present invention assigns a predetermined coefficient to each of the plurality of color-separated band images when performing arithmetic processing between color-separated multi-band images in different wavelength ranges. First means for creating a brightness image of each original image by multiplying and then adding;
Second means for performing a predetermined inter-image operation on the brightness image, third means for selecting either the average value image of the original images or the original image as a reference image, the reference image and the And a fourth means for generating a final image by taking the product of the inter-image calculation result images.

The fundus photographing apparatus according to the fifth aspect of the invention is capable of moving in and out of an illumination optical system for illuminating a subject, a photographing optical system for photographing the subject, an image pickup means including a photoelectric conversion element, and an illumination optical system or a photographing optical system. Wavelength selection filters, detection means for each filter, shooting mode selection means for selecting one of a plurality of shooting modes, recording means for recording the output from the image pickup means, and state of the shooting mode selection means. When the output of the image pickup means is recorded in the recording means, a judgment means for judging whether to record only the luminance signal of the output of the image pickup means or the luminance signal and the color signal is provided. It is what

In the fundus photographing apparatus according to the sixth aspect of the invention, the illumination optical system for illuminating the subject, the photographing optical system for photographing the subject, the image pickup means including the light ray conversion element, and the illumination optical system or the photographing optical system can come and go. Wavelength selection filters, detection means for each filter, shooting mode selection means for selecting one of a plurality of shooting modes, recording means for recording the output from the image pickup means, and state of the shooting mode selection means. When the output of the image pickup means is recorded in the recording means, a judging means for judging whether the recording mode is the continuous recording mode or the review mode is provided.

[0023]

In the fundus photographing apparatus according to the first aspect of the present invention having the above-described structure, the diopter of the photographing optical system is detected, and the illumination light amount is controlled according to the detected diopter. To be able to obtain fundus photographs with various exposures.

In the fundus photographing apparatus according to the second invention,
By inputting the axial length of the eye and controlling the amount of illumination light according to the axial length of the eye, a fundus photograph with proper exposure can be obtained with a simple configuration.

In the medical color image processing apparatus according to the third aspect of the present invention, each band image multiplied by a predetermined coefficient is added to create a lightness image, and various processing necessary for diagnosis is performed on this image to perform processing. By localizing the effect in the lightness region and further multiplying the original band image by this lightness image, a processed image that does not impair the color tone of the original image is obtained.

In the medical color image processing apparatus according to the fourth aspect of the present invention, a band image obtained by multiplying a plurality of original images by a predetermined coefficient is added to create a lightness image. A means for performing calculation and a means for selecting either the average value image of each original image or the original image as a reference image are provided, and the final image is generated by taking the product of the reference image and the image resulting from the inter-image calculation.

In the fundus photographing apparatus according to the fifth invention,
By providing a means for selecting the photographing mode of the fundus image to be recorded and a means for selecting the image mode recorded in the image recording device from the photographing mode setting state selected by this means, as a color image at the time of color image photographing, or When photographing monochromatic light such as fluorescence, the fundus image is recorded as a monochrome image.

In the fundus photographing apparatus according to the sixth invention,
By providing a means to select multiple shooting modes,
The fundus image is recorded in the review mode when capturing a color image and in the continuous capturing mode when capturing a fluorescent image.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the embodiments shown in FIGS. FIG. 1 shows a block diagram of the first embodiment. On the optical path O1 from the light source 1 to the subject's eye E, a lens 2, a perforated mirror 3 having an opening 3a at the center,
The objective lens 4 is arranged and the optical path behind the perforated mirror 3
A focus lens 5, a taking lens 6, a flip-up mirror 7, and a film 8 are arranged on O2. On the optical path in the reflection direction of the flip-up mirror 7, the mirror 9 and the focus plate 1
0 and a finder lens 11 are arranged.

Reference numeral 12 is a control box, and an output is provided from the control box 12 to a focus lens driving means 13 for driving the light source 1 and the focus lens 5, and a focus adjustment switch 14 and a photographing switch 15 are connected. .

At the time of observation, the light flux emitted from the light source 1 passes through the relay lens 2, is reflected by the perforated mirror 3, passes through the objective lens 4, and passes through the pupil Ep of the eye E to be examined.
Illuminate Er. The fundus image is an objective lens 4 and a perforated mirror 3.
Through the aperture 3a, the focus lens 5, and the photographing lens 6, and is reflected by the flip-up mirror 7 and the mirror 9 to form an image near the focus plate 10. Photographer uses finder lens 1
Observe the image through 1. Then, when the image forming position of the fundus image is deviated from the focus plate 10, the focus adjustment switch 14 adjusts the position of the focus lens 5 so that the image forming position of the fundus image coincides with the focus plate 10.
The focus lens 5 receives an input from the switch 14 and is moved via the control box 12 by the lens driving means 13 including a linear motor, for example. The position of the focus lens 5 is always detected by the control box 13, and the control box 12 determines the light emission amount of the light source 1 at the time of photographing from the position of the focus lens 5.

The position of the focus lens 5 corresponds to the diopter of the eye E to be examined. The cause of the refractive error of the eye E is
When there is an abnormality in the refractive element of the eyeball and when the pupil Ep to the fundus Er
There are cases where there is an abnormality in the axial length, which is the distance to, and there are cases where there is an abnormality, but according to statistics, there is a strong correlation between diopter and axial length, as shown in FIG. Is generally known.

Since the light source 1 is substantially conjugate to the pupil Ep of the eye E to be examined, the illuminance of the fundus Er is approximately inversely proportional to the square of the axial length of the eye. Further, since the entrance pupil of the photographing optical system is the aperture 3a of the perforated mirror 3 and it is substantially conjugate with the pupil Ep of the eye E to be examined, the brightness of the fundus image reaching the film surface 11 at the time of photographing is equal to the axial length. It is inversely proportional to the square. Therefore, the amount of light that the light source 1 should emit needs to increase in proportion to the fourth power of the axial length. FIG. 3 shows the relationship between the diopter and the correction light amount.

From the above, the control box 1
In 2, the diopter of the subject's eye E is calculated from the position of the focus lens 5, and this diopter information is converted into a general axial length, whereby the appropriate light emission amount of the light source 1 can be determined.

After the photographer finishes the focusing operation and confirms the photographing region and the presence or absence of flare, the photographing switch 15
push. The flip-up mirror 7 is retracted to the outside of the optical path, the light source 1 emits a luminous flux of the luminous quantity obtained from the means, the luminous flux illuminates the fundus Er of the eye E in the same manner as the observation light, and the fundus image is the objective lens. 4, the image is recorded on the film 8 through the opening 3a of the perforated mirror 3, the focus lens 5, and the photographing lens 6, and the recording is completed.

In this embodiment, the position of the focus lens 5 is continuously detected and the light source 1 emits the light amount corresponding to each position, but the moving range of the focus lens 5 is divided into a plurality of regions. A unit for detecting in which area the focus lens 5 is provided, a unit for storing the amount of light emission corresponding to the detected region, or a unit for storing a combination of charge accumulating units used for light emission is provided. May be controlled discontinuously. The latter is cheaper because it has a simpler configuration.

Further, in the present embodiment, the axial length was observed from the diopter of the eye E to be examined. However, means for inputting the axial length measured by other means was provided, and the amount of light emission more appropriate than the axial length. May be determined.

FIG. 4 is an explanatory diagram of the image processing according to the second embodiment for the fundus photographing apparatus. The fundus image Pi is separated by the input device 16 into red, green, and blue, and then A /
The original image data Pa that is D-converted and digitized for each of the red, green, and blue bands is generated. Here, the original image data Pa has original image band images R1, G1, and B1.
The original image band images R1, G1, B1 are converted by the linear combination circuit 17 into a lightness image L1 = r (R1) + g (G1) + b (B1). The arithmetic expression between images means that the notation operation is performed for each corresponding pixel in each image, and as a result, one image data is generated, and r, g, and b are coefficients of each image. . For example, if R1, G1, and B1 are color-separated into NTSC system, r = 0.30, g = 0.5
9, b = 0.11.

For this brightness image L1, the image processing circuit 1
In the case of filter processing, for example, edge enhancement processing in 8, the Laplacian is added to the brightness image L1 and the result is set as the brightness image L2. Then, in the divider 19, the brightness image
Let M be a lightness ratio image M that is the ratio of each pixel of L1 and the lightness image L2.
= Calculate with L2 / L1. Finally, in the multiplier 20,
The original band images R1, G1, and B1 are multiplied by the brightness ratio image M to obtain analog signals R2, G2, and B2 from the processed band images, and these R2, G2, and B2 are processed image data Pb. The processed band images R2, G2, B2 are converted into D / A converters 21r, 21g, 2
The processed result fundus image Po is displayed by inputting it on the RGB television monitor 22 via 1b.

In the above processing, the ratio F (Pa) of (red, green, blue) of an arbitrary pixel of the original image data Pa and the ratio F (Pb) of red, green, blue of the pixel corresponding to the processing of the image data Pb. Is immutable. That is, if the red, green, and blue values of the corresponding arbitrary pixels in each image are r1, g1, b1, r2, g2, and b2, respectively, r2 = mr1 = L2 / L1r1 g2 = mg1 = L2 / L1g1 b2 = mb1 = L2 / L1b1 F (Pa) = (r1, g1, b1) and F (Pb) = (r2, g2, b2) = (mr1, mg1, mb1) = F
(Pa). In this way, the fact that the ratio of the three primary colors, red, green, and blue of the original image fundus image Pa and the image-processed fundus image Pb is the same means that there is no color change in the image processing.

In the second embodiment, an example of processing a single image has been shown, but an example of processing a plurality of images will be described below. Although FIG. 5 shows a processing method for the difference calculation of two images, the processing method is the same even when there are two or more target images. Target original image fundus image Pa3, Pa4
Is assumed to have already been histogram-matched using the above process. First, the original band images digitized as described above, which constitute the binocular fundus images Pa3 and Pa4.
Lightness images L3 and L4 are obtained from R3, G3, B3 and R4, G4, B4 by the linear combination circuits 23, 24. Next, the subtractor 25 calculates the difference image D = L3−L4 of the brightness image I1.

On the other hand, in order to store the color information of both primary images, the average calculator 26 calculates average band images R, B and G for the three primary colors of the reference image. This calculation method is R = ΣRi /
n, B = ΣBi / n, G = ΣGi / n, and n represents the number of original images. In this embodiment, taking R as an example, R =
(R3 + R4) / 2. Finally, the difference image D is multiplied by the multiplier 2
At 7, the average images R, G, B are multiplied to obtain final processed band images R5, G5, B5.

Also in this method, color information is preserved, and an image useful as a diagnostic image is obtained. Further, substantially the same effect can be obtained by using the original band image as it is, instead of R, G, B as the reference band image for storing the color information.

FIG. 6 is a block circuit diagram of the electronic image recording apparatus according to the third embodiment. The output of the color television camera 28 for photographing the eye to be inspected is recorded by the recording apparatus 30 via the color signal selecting apparatus 29. The output of the photographing mode selection device 31 that is connected to the color fundus photographing device is connected to the color signal selection device 29 via the recording mode selection device 32.

In the fundus photographing apparatus, when a photographing mode of the color image is selected by the photographing mode selection apparatus 31 at the time of photographing a color image, an appropriate photographing light amount is determined and an illumination and a photographing filter are selected as necessary. When a photographing switch (not shown) is pressed, a fundus image as shown in FIG. 7 is captured by the color television camera 28.

FIG. 8 shows one scanning line signal of the output signal of the color television camera 28. The output signal of the color television camera 28 is a superposition of a burst wave of 3.58 MHz which is a color signal and a luminance signal. , Forming a color image.

In the recording mode selection device 32, in order to obtain a color image according to the mode set by the photographing mode selection device 31, a command to output a luminance signal and a color signal is sent to the color signal selection device 29. The color signal selection device 29 outputs luminance and color signals, and the recording device 30 records a color image.

At the time of taking a fluorescent image, a fluorescent agent is intravenously injected into the eye to be examined. When the fluorescence photographing mode is selected in the photographing mode selection device 31, an exciter filter and a barrier filter are prepared. When the photographing switch is pressed, the color television camera 28 images the fluorescent fundus as shown in FIG.

Similar to the case of taking a color image, the output signal of the color television camera 28 is a superposition of the luminance signal shown in FIG. 10 and the color signal of the burst wave of 3.58 MHz. However, since the fluorescent image photographing is monochromatic photographing, the recording mode selection device 32 determines that the color signal is unnecessary. Based on this judgment, the color signal selection device 2
9 outputs only the luminance signal shown in FIG.
A fluorescent image with no unnecessary color development is recorded on.

As the color signal selection device 29, a configuration using a notch filter 33 which does not pass the burst wave of 3.58 MHz shown in FIG. 12 can be considered. Although a still video has been widely used as the recording device 30 in recent years, an optical disk, a magneto-optical disk, or the like is also suitable, and a moving picture video may be used.

FIG. 13 shows a fourth embodiment using a color television camera 28 having RGB outputs, which is adapted to process the three primary color signals in FIG. 6 described above. In this example, the luminance signal Y is expressed as the sum of Y, rR, gG, and bB, which is obtained by multiplying each of the R, G, and B signals by a coefficient peculiar to the signal and weighting. On the other hand, the color signals are two types of color difference signals S1 and S2.
Expressed as

In this case, the color signal selection device 29 selects whether to output only the luminance signal Y or the luminance signal Y and the color difference signals S1 and S2. When recording a color image, R, G, B signals may be output. Further, instead of the television camera, another two-dimensional optical conversion element may be used, and in this case, the pixel signal from each element may be read to synthesize the image.

In fluorescence photography, anterior ocular segment fluorescence photography using a photo slit lamp is known in addition to the fundus photography apparatus. In this case, the same effect as the embodiment used in the fundus photography apparatus can be obtained. . Further, the fundus image can be recorded as a monochrome image also in the case of monochromatic light photography using a specific wavelength selection filter such as a red-free filter other than fluorescence photography.

FIG. 14 is a block circuit diagram of the fifth embodiment. As in the case of FIG. 6, a color television camera 28, a color signal selection device 29, and an image recording device 30 are connected, and a photographing mode selection device 31 and a recording device. The mode selection device 32 and the color signal selection device 29 are connected, and the filter detection circuit 34 is further connected to the recording mode selection device 32.

In this case, the filter detection circuit 34 detects whether or not the specific wavelength selection filter is inserted in the illumination or photographing optical system, and outputs the state of the detected filter to the recording mode selection device 32. The recording mode selection unit 32 determines from the information from the photographing mode selection device 31 and the filter detection circuit 34 whether the fundus image to be recorded is a color image or a monochrome image.

FIG. 15 is a block circuit diagram of the electronic image recording apparatus according to the sixth embodiment. The output of the television camera 35 for photographing the eye to be examined is connected to the recording apparatus 30 and incorporated in the main body of the fundus photographing apparatus. The output of the photographing mode selection device 31 is connected to the recording device 30 via the recording mode selection device 32. A monitor 36 is connected to the recording device 30.

In the fundus imaging apparatus, when a color image shooting mode is selected by the shooting mode selection unit 31 during color image shooting, an appropriate shooting light amount is determined and, if necessary, illumination and shooting filters are selected. Then, when a photographing switch (not shown) is pressed, the television camera 35 captures a fundus image as shown in FIG.

At this time, since the review mode has been selected as the recording mode by the recording mode selection device, reproduction can be performed immediately after recording and the monitor 36 can confirm the recorded image. When taking a picture next time, the picture taking switch may be pressed after the recording apparatus is again in the recording preparation state. After that, the above operation is repeated.

At the time of taking a fluorescent image, a fluorescent agent is intravenously injected into the eye to be examined. When the fluorescence photographing mode is selected in the photographing mode selection device 31, an exciter filter and a barrier filter are prepared. When the photographing switch is pressed, the television camera 35 images the fluorescent fundus as shown in FIG.

At this time, since the continuous recording mode is selected by the recording mode selection device as the recording mode, one fundus image is recorded every second while the photographing switch is kept pressed. In the review mode during fluorescent photography, it takes 1 minute to move the head from the playback track to the recording track.
It is impossible to take a picture.

[0061]

As described above, in the fundus photographing apparatus according to the first and second aspects of the invention, the fundus can be photographed at a proper exposure amount with a simple structure and at low cost.

Further, in the medical color image processing apparatus according to the third and fourth aspects of the invention, the composition ratio of the three primary colors of each pixel can be saved between the original image and the processed image, and the tone of the original image is saved as it is.

In the fundus photographing apparatus according to the fifth invention,
By providing the means for removing the color signal from the television camera signal, not only one color television camera can be used for color image capturing and fluorescent image capturing, but also for monochrome image capturing such as fluorescent image capturing, the image is converted to black and white. Since the recording is performed, an erroneous color can be removed and the deterioration of the image quality due to the color signal can be prevented.

In the fundus photographing apparatus according to the sixth invention,
Color shooting can be achieved reliably at the time of shooting.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a first embodiment.

FIG. 2 is a relationship diagram between diopter and axial length.

FIG. 3 is a relationship diagram between a diopter and a correction light amount.

FIG. 4 is an explanatory diagram of image processing according to a second embodiment.

FIG. 5 is an explanatory diagram of a plurality of image processes.

FIG. 6 is a block circuit configuration diagram of an electronic image recording apparatus according to a third embodiment.

FIG. 7 is an explanatory diagram of a color fundus image.

FIG. 8 is a time chart diagram of scanning line signals of a color fundus image.

FIG. 9 is an explanatory diagram of a fluorescent fundus image.

FIG. 10 is a time chart diagram of scanning line signals in which color signals of a fluorescent fundus image are not excluded.

FIG. 11 is a time chart diagram of scanning line signals excluding color signals of a fluorescent fundus image.

FIG. 12 is a circuit diagram of a color signal selection device.

FIG. 13 is a block circuit configuration diagram of a fourth embodiment.

FIG. 14 is a block circuit configuration diagram when a fundus imaging apparatus having a wavelength selection filter according to a fifth embodiment is used.

FIG. 15 is a block circuit configuration diagram of a sixth embodiment.

FIG. 16 is a conceptual diagram of conventional image processing.

[Explanation of symbols]

 1 Light Source 3 Perforated Mirror 7 Bounce Mirror 8 Film 11 Finder Lens 12 Control Box 16 Input Device 17, 23, 24 Linear Coupling Circuit 18 Image Processing Circuit 19 Divider 20, 27 Multiplier 22 RGB TV Monitor 26 Average Calculator 28 Color TV camera 29 Color signal selection device 30 Image recording device 31 Shooting mode selection device 32 Recording mode selection device 33 Notch filter 34 Filter detection device 35 TV camera

Claims (8)

[Claims] 1. A focusing adjusting means for focusing on an eye to be inspected in the photographing optical system, a detecting means for detecting a diopter of the photographing optical system, and a diopter of the photographing optical system converted to a fundus illumination light amount. A fundus imaging apparatus comprising: a conversion unit that performs the conversion and an illumination unit that illuminates the fundus with the amount of illumination light determined by the conversion unit. 2. Input means for inputting an axial length of an eye to be inspected,
A fundus imaging apparatus comprising: a conversion unit that converts the axial length input by the input unit into a fundus illumination light amount, and an illumination unit that illuminates the fundus with the illumination light amount determined by the conversion unit. 3. A lightness image of each original image is created by multiplying a color-separated multi-band image by a predetermined coefficient and then adding the multi-band images when the color-separated multi-band images are processed in different wavelength bands. Means, a second means for performing various processes on the brightness image to create an intermediate image, a third means for creating a brightness ratio image from a ratio of the intermediate image to the brightness image, A medical color image processing apparatus, comprising: a processing means including a fourth means for taking a product of each of the band images and the lightness ratio image to create a final image. 4. When performing arithmetic processing between multi-band images that have been color-separated in different wavelength regions, each original image is obtained by multiplying each of the plurality of color-separated band images by a predetermined coefficient and then adding them. Image brightness 1st to create an image
Means, a second means for performing a predetermined inter-image calculation on the brightness image, and a reference image and the inter-image calculation of the average value image of each of the original images or the original image as a reference image. And a third means for taking a product of the resultant images and generating a final image. 5. An illumination optical system for illuminating a subject, a photographing optical system for photographing the subject, an image pickup means including a photoelectric conversion element, a wavelength selection filter capable of entering and leaving the illumination optical system or the photographing optical system, and each filter. Detection means, shooting mode selection means for selecting one of a plurality of shooting modes, recording means for recording the output from the image pickup means, and output of the image pickup means according to the state of the shooting mode selection means. When recording in the means, an ophthalmologic photographing apparatus provided with a judging means for judging whether to record only the brightness signal of the output of the image pickup means or to record the brightness signal and the color signal. . 6. An exciter filter for the illumination optical system,
The ophthalmic photographing apparatus according to claim 5, wherein the photographing optical system has a barrier filter and has photographing mode selection means for color photographing and fluorescence photographing, and photographs fluorescence of a subject. 7. An illumination optical system for illuminating a subject, a photographing optical system for photographing the subject, an imaging means including a light beam conversion element, a wavelength selection filter capable of entering and leaving the illumination optical system or the photographing optical system, and each filter. Detection means, shooting mode selection means for selecting one of a plurality of shooting modes, recording means for recording the output from the image pickup means, and output of the image pickup means according to the state of the shooting mode selection means. An ophthalmologic imaging apparatus, characterized in that a determination means is provided for determining whether to set the recording mode to the continuous recording mode or the review mode when recording on the means. 8. The illumination optical system is provided with an exciter filter, the photographing optical system is provided with a barrier filter, and photographing mode selection means for color photographing and fluorescence photographing is provided to photograph fluorescence of a subject. The ophthalmologic photographing apparatus according to 7.