JP3458073B2 - Monitor shooting device for endoscope - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is combined with, for example, an electronic endoscope having a solid-state image pickup device such as a CCD on the distal end side, and the solid-state image pickup device of the electronic endoscope picks up an image of a region to be observed and performs signal processing. The present invention relates to an endoscope monitor photographing apparatus for inputting a video signal obtained in this way, displaying an image on a built-in internal display means, and photographing the displayed image.

[0002]

2. Description of the Related Art In recent years, endoscopes have come to be widely used in medical fields and industrial fields. Further, an electronic endoscope having a built-in solid-state image pickup device such as a CCD on the distal end side of the insertion portion is also popular. In the case of an electronic endoscope, a picked-up image pickup signal is converted into a video signal by a signal processing device such as a video processor and input to a display means such as a CRT to display an endoscopic image displayed on an image display surface. You will be observing.

Particularly in the medical field, there is a strong need for a hard copy of the endoscopic image displayed on the display means.
For this reason, an endoscopic monitor imaging device for taking a picture of an endoscopic image displayed on the display means is often used as a means for recording an image inside a body cavity when the endoscope is used.

However, some images obtained by an electronic endoscope differ in the structure of the site to be observed, how the illumination light strikes, and the average brightness of the video signal. It is difficult to perform a correct image diagnosis unless the brightness of the film shot with such an image is constant. Therefore, an endoscope monitor photographing device used when using such an endoscope is adapted to photograph an image output on a monochrome CRT screen with a camera, for example.

For example, as shown in FIG. 6, an endoscope apparatus 60 having such an endoscope monitor photographing apparatus includes an electronic endoscope 61 having a solid-state image pickup element (not shown) and an electronic endoscope 61. A light source device 62 that supplies illumination light to the endoscope 61, a video processor 63 that performs signal processing of an image pickup signal of a solid-state image pickup device of the electronic endoscope 61 and outputs a video signal, and a video signal from the video processor 63. And an external monitor 64 as an external display means for displaying an image and an image monitor output device 65 for an endoscope, which is connected to the video signal output end of the video processor 63 and takes a photograph of a color image. It

The endoscopic monitor image-taking device 65 includes a device main body 67 having an image-taking monitor 66 as an internal display means for displaying an input video signal as a frame-sequential color component image, and the image-taking monitor. It is composed of a camera 69 as a photographing means for photographing the color image by multiple-exposing the color component image displayed in the display area of 66 on the film 68. The camera 69 can be detachably attached to the apparatus body 67.

The electronic endoscope 61 has a light guide (not shown). Illumination light is supplied from the light source device 62 to the side surface of the light guide on the near side, and the illumination light is transmitted to the insertion portion (not shown). The site to be observed such as the affected area is illuminated from the end face on the distal side. The illuminated observation target site is photoelectrically converted by forming an optical image on a solid-state imaging device arranged at the image forming position by an objective lens attached to an observation window at the tip end (not shown). An image pickup device drive signal from the video processor 63 is applied to the solid-state image pickup device, and an image pickup signal corresponding to the picked-up endoscopic image is input to a signal processing circuit in the video processor 63 and converted into a video signal. It is supposed to be done. An observation video signal is input from the video processor 63, and an endoscopic image is displayed on the external monitor 64. The video processor 63 is also connected to the endoscopic monitor photographing device 65, and the release signal is transmitted from the video processor 63 through the release / data communication signal input / output unit 71 by data communication or an operation of a release operating means (not shown). And the video signal is transmitted via the video signal input unit 72.

When the endoscope operation section is grasped and the observation target site in the body cavity is observed by the external monitor 64 by using the endoscope apparatus 60 having such a structure, a release operation means (not shown) is provided. When the release signal is transmitted from the video processor 63 to the endoscopic monitor photographing device 65 by the operation of, the CPU 73 in the device main body 67 receives the release signal and communicates with the camera control unit 74 in the camera 69. Control of film winding, diaphragm adjustment, etc., camera identification, film identification, camera state detection, etc. are performed, and at the same time, the memory controller 75 in the apparatus main body 67 is used to capture an image such as setting an initial address. I am supposed to give instructions.

The image memory 76, which has received the image capturing instruction, is subjected to necessary processing such as A / D conversion by an analog preprocessing circuit 77 as a preprocessing section, and the A / D converted image data is photographed. Only the required size is written.
Since the endoscope monitor photographing device 60 performs multiple exposure, it has an image memory 76 for each color of R, G, B and writes image data of each color in the image memory 76. There is. Then, once the image memory 76
The image data written in the
The G, B, and B colors are sequentially read out, and the analog post-processing circuit 78 as a post-processing unit performs necessary processing such as D / A conversion, and the R, G, B is displayed on the photographing monitor 66. The images for each color are sequentially displayed. This photographing monitor 66
(Not shown) between the camera provided opposite to
The G and B optical filters are provided, and the photographing monitor 66
Each filter enters the optical path according to the image displayed in
A color image is formed on the film 68 in the camera 69 by the lens 79 and photographed. The photographed film 68 is developed so as to be observed.

[0010]

However, when an endoscopic image is photographed by such an endoscopic monitor photographing device 65, it is necessary to develop the film 68, so that it takes time before the actual image is seen. It was hanging. Therefore, in order to explain to the patient who has undergone the examination, the explanation will be given on a different day, or the explanation will be given using a video printer or the like (not shown). It was Further, when an electronic filing device or the like (not shown) is used, connection with the device and use of the device are complicated. Further, there is a problem in terms of cost when a large-capacity image memory is used to increase the number of reproducible images, and when a large number of relatively small-capacity image memories are used, the mounting area on the board becomes large, There is a problem in that the substrate and the device are downsized.

The present invention has been made in view of these circumstances, and it is possible to immediately reproduce and observe a photographed image immediately after the inspection without using an electronic filing device and the like, and also an image memory for one film. And then film 2
An object of the present invention is to provide a monitor imaging device for an endoscope, which enables reproduction of still images of the same number.

[0012]

In order to achieve the above object, the present invention according to claim 1 provides a pre-processing unit for signal-processing and A / D converting an input video signal, and A
The image data that has been D / A converted can be temporarily stored in order to display an image for each of the R, G, and B color components, and the image data stored in this image memory can be D / A converted. And post-processing unit for performing signal processing, an internal display unit for inputting a video signal from the post-processing unit and displaying an image for each of R, G, B color components, and an image displayed on the internal display unit. A monitor photographing device for an endoscope having a photographing means for photographing an image, and an external output part for outputting the image data stored in the image memory for photographing to the outside from the post-processing part. It is characterized in that the video signal from the unit can be displayed on the external display means as a still reproduction image. Further, in the endoscope monitor photographing apparatus according to the second aspect of the present invention, another photographing image data is stored in a storage area for one field of already photographed image data stored in the image memory. One of the fields can be overwritten, and a frame image is reproduced at the time of photographing, and a field image is reproduced at the time of displaying on the external display device. With this configuration, the captured image can be immediately reproduced and observed immediately after the inspection without using an electronic filing device, and the film 1
To realize an endoscope monitor photographing device capable of reproducing a still image of two films with an image memory for the number of lines.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will now be described with reference to the drawings.
An embodiment will be described. 1 to 5 relate to an embodiment of the present invention, and FIG. 1 is an explanatory view showing an endoscope apparatus equipped with an endoscope monitor imaging apparatus according to an embodiment of the present invention, and FIG. 3A is an explanatory view showing the concept of writing and reading at the time of taking a photograph and still image reproduction of the image memory of No. 1, and FIG. 3 is an explanatory view schematically showing the state of the writing area in the image memory. ) Is an explanatory view showing the state of the image memory in which the release operation is repeated up to 20 frames of film, and FIG. 3B shows the state of FIG. After the replacement, the second film 1 is placed in the area of one field of the photographed image in the image memory that has been written up to 20 frames of film.
An explanatory diagram showing the state of the image memory in which the image data for 0 frames is overwritten with frames. In FIG. 3C, the release operation and the photography are further repeated from the state of FIG. 4 is an explanatory view showing the state of the image memory at the time when the shooting of is finished, FIGS. 4 and 5 show display examples of still reproduced images displayed on the external monitor, and FIG. 4 is an index showing a plurality of frames on the external monitor. FIG. 5 is an explanatory diagram showing an image display example, and FIG. 5 is an explanatory diagram showing a display example when one frame is displayed on an external monitor.

As shown in FIG. 1, an endoscope apparatus 1 having one embodiment of the present invention is an electronic endoscope having a built-in solid-state image pickup device (not shown) as described in FIG. 6, for example. 2 and
A light source device 3 that supplies illumination light to the electronic endoscope 2, a video processor 4 that performs signal processing for the solid-state image pickup device of the electronic endoscope 2, and an observation video signal output from the video processor 4 are displayed. An endoscope which is connected to an external monitor 5 serving as an external display unit and a video signal output terminal of the video processor 4 and outputs a video signal for photographing as a video signal for hard copy to photograph a color image. Monitor imaging device 6. Although not shown, a keyboard or the like for inputting patient data and various information is connected to the video processor 4.

The endoscope monitor photographing device 6 is provided with a photographing monitor 7 as an internal display means for displaying an inputted video signal as a frame-sequential color component image, as described with reference to FIG. The device body 8 and the camera 10 as a photographing means for photographing the color image by multiple-exposing the color component image displayed in the display area of the photographing monitor 7 on, for example, a silver salt film (hereinafter referred to as film) 9. Composed of and. The camera 10 can be detachably attached to the apparatus body 8.

The electronic endoscope 2 illuminates an observation target site such as a diseased part with the illumination light supplied from the light source device 3 as described with reference to FIG. An image pickup signal obtained by photoelectric conversion is signal-processed by the video processor 4 to be converted into a video signal, and an endoscopic image is displayed on the external monitor 5 as a video signal for observation. A video signal for shooting is output as a video signal for input to the main body 8 of the endoscopic monitor shooting device 6 via the video signal input unit 11.

The apparatus main body 8 performs a signal processing on the video signal for photographing input through the video signal input section 11 and then,
An analog pre-processing circuit 12 for D / D conversion, an image memory 13 capable of temporarily storing the image data converted by the analog pre-processing circuit 12, and a memory controller for making settings for controlling the image memory 13. 14, an image quality setting circuit 15 that performs processing for improving the image quality of the image data converted by the analog preprocessing circuit 12, and a release data communication signal is transmitted and received via a release data communication signal input / output unit 16. CPU 17 for controlling the memory controller 14 and changing the settings of the image quality setting circuit 15 and for communicating with the camera control unit 10a in the camera 10 to take a picture, and the image quality setting circuit 15 The digital video signal output from the D / A
An analog post-processing circuit 18 for converting the analog video signal into a predetermined analog video signal and an image for each color of R, G, B of the analog video signal output from the analog post-processing circuit 18 are sequentially displayed. The monitor 7 for photographing is mainly configured.

The endoscope monitor imaging device 6 of the present embodiment
Is provided with an external output section for outputting the image data stored in the image memory 13 for taking a picture from the analog post-processing circuit 18 to the outside, and the video signal from the external output section is used as a still reproduction image in the external monitor 5. In addition, the storage area for one field of already captured image data in the image memory 13 can be overwritten with one field of image data for another shooting, and a frame image is reproduced at the time of taking a picture. When displayed on the external monitor 5, the field image is reproduced.

The analog pre-processing circuit 12 performs various processes such as gain adjustment, band limitation for A / D conversion, and pedestal clamp on the input video signal for photographing, and then performs A / D conversion. To output digital video signals.

The image memory 13 stores the image data of the digital video signal converted by the analog preprocessing circuit 12 by controlling the write / read address and the like by the memory controller 14. The memory controller 14 is connected to the CPU 17 so that the image data can be erased, the write / read address can be set, and the address of the image memory 13 can be read. In this embodiment, since multiple exposure is performed, an image memory 13 is provided for each color of R, G, B, and image data of each color is written in each image memory 13.
The image data written in the image memory 13 is read as a read-out image for photographing in order for each color of R, G, B when the photographing order comes. The image memory 13 is also used as an image memory for external display.

The image quality setting circuit 15 is capable of switching a set value relating to image quality between an image at the time of taking a photograph displayed on the photographing monitor 7 and an image at the time of still reproduction displayed on the external monitor 5. The image data of the digital video signal converted by the analog preprocessing circuit 12 is subjected to processing for improving the optimum image quality for observation. still,
This processing is, for example, gamma conversion means, color tone conversion means, contour enhancement means, pedestal level changing means, or any combination thereof.

The CPU 17 has the image quality setting circuit 15
And an image at the time of taking a photograph displayed on the photographing monitor 7 which is switched by the image quality setting circuit 15 in order to change the setting of the image quality setting circuit 15 and the external monitor 5. The image quality setting circuit 15 is controlled so that the optimum image quality can be obtained in accordance with each mode of the setting value relating to the image quality for the image during still reproduction.
Further, the CPU 17 is similar to that described with reference to FIG.
By communicating with the camera control unit 10a in the camera 10, for example,
Controls such as film winding and aperture adjustment, camera identification, film identification, camera state detection, etc., and is connected to the video processor 4 for release / release.
A release / data communication signal is transmitted / received via the data communication signal input / output unit 16 to receive a release signal or patient data from the electronic endoscope 2, or the state of the endoscope monitor / photographing device 6 is displayed on the video. Control such as transmission to the processor 4 is performed. The CPU 17 is provided with a detecting means for detecting the end of the endoscopic examination or the start of the endoscopic examination, and based on the detection result of the detecting means, the time of the previously performed endoscopic examination is determined. In order to surely erase the image data stored in the image memory, the memory controller 14
Is controlled to erase and clear the image data in the image memory 13. In that case, the camera may be configured to be automatically erased by detecting attachment / detachment of the camera, power ON / OFF, input of patient data, or the like, or by detecting an operation such as the end of an examination.

The analog post-processing circuit 18 D / A-processes the digital video signal output from the image quality setting circuit 15.
The converted analog video signal is subjected to various processes to output an RGB analog video signal to the photographing monitor 7, and an external output section 19 provided as an external output, The R, G, and B still reproduction video signals are output to the external monitor 5.

The photographing monitor 7 displays R, G, and R of analog video signals output from the analog post-processing circuit 18.
Images of respective colors B are sequentially displayed, and R, G, and B optical filters (not shown) are provided between the photographing monitor 7 and the camera 10 provided so as to face it. Then, each filter enters the optical path according to the image displayed on the photographing monitor 7, and a color image is formed on the film 9 in the camera 10 by the lens 10b so as to be photographed.

A method for taking a photograph by the thus configured endoscope monitor photographing device 6 and displaying a still reproduction image on an external monitor will be described with reference to FIGS. 2 and 3. First, hold the endoscope operating part to operate the endoscope,
When a release operating means (not shown) is operated while observing the observation target site in the body cavity with an external monitor, a release signal is sent from the video processor 4 to the endoscope monitor imaging device 6. When the CPU 17 in the apparatus body 8 receives this release signal, it communicates with the camera control unit 10a in the camera 10 to prepare for shooting, and at the same time, the memory controller 14 captures images such as setting addresses and writing. Instructions are given.

The image memory 13 which has received the image fetching instruction from the memory controller 14 stores the image data, which has been subjected to the necessary processing in the analog pre-processing circuit 12 and A / D converted, as shown in FIG. The written image 21 is written in a frame unit including the odd number field 21a and the even number field 21b in a size required for photographing.

In general, the number of images that can be taken on the film 9 dedicated to the endoscope is 20, so that the release operation is repeated by the release operation means (not shown), and as shown in FIG. When the image is written in the image memory 13, the image for one film is captured in the image memory 13. That is, specifically, the odd-numbered field 1 in which the image data for one film remains between 1 frame and 20 frames.
3a and the even field 13b are sequentially written in the image memory 13 in frame units.

The image data written in the image memory 13 has an odd-numbered field 22a and an even-numbered field 22b as the read image 22 for photographing in order for each color of R, G, B when the photographing order comes. Is read out in frame units, and the optimum processing is performed on the image taken by the image quality setting circuit 15 and the film used. still,
The information about the film is transmitted to the CPU 17 by a camera communication signal from the camera control unit 10a in the camera 10, and the CPU 17 sets the image quality setting circuit 15 to the optimum setting for the film 9 to be used.

Then, the image data optimally processed for the image and film by the image quality setting circuit 15 is subjected to necessary processing such as D / A conversion by the analog post-processing circuit 18 to obtain R, G, B colors. Each image is sequentially displayed on the photographing monitor 7. In accordance with the images sequentially displayed on the photographing monitor 7, a color image is formed on the film 9 in the camera 10 and exposed, whereby an endoscopic image is photographed on the film 9.

After shooting 20 frames, film 9
After the replacement, the image memory 13 in which the film 20 has been written up to the frame 20 as shown in FIG. 3B has an area for one field of the already photographed image, for example, an even field 13b with 1 frame to 20 frames. In the written area, image data of 10 frames (21 frames to 30 frames) of the second film is recorded in the odd field 13c and the even field 13d.
It is overwritten in units of frames including and.

Further, from this state, the release operation and the photographing operation are repeated, and at the time when the photographing of two films is completed, the image memory 13 stores the second remaining film 10 frame as shown in FIG. 3C. Image data of minutes (31 to 40 frames) is overwritten in the area of the even field 13d, for example, in the odd field 13e, and still reproduction images of 40 frames are stored in the image memory 13 for 20 frames for photographing. In the present embodiment, the number of frames of the film is 20 and the image for still reproduction is 40, but there is no problem even if it is arbitrarily changed according to various conditions such as cost and mounting area. In addition, when it is not necessary to use 40 frames for the still reproduction image and 20 frames are sufficient, a mode for reproducing 20 frames in a frame may be provided. Furthermore, FIG.
In the image memory 13 shown in FIG.
Although other image data is overwritten, the even field may be left.

Then, with the still image reproduced for 40 frames stored in the image memory 13, for example, an external monitor 5
When the user wants to display a still reproduction image on the screen, an operation for still reproduction is performed from a keyboard (not shown) connected to the video processor 4 or an operation panel (not shown) provided on the endoscope monitor imaging device 6. . Then, the CPU 17 which receives this signal instructs the memory controller 14 about the address information of the image to be reproduced and the reproducing method (plural frame display or one frame display, etc.), and the memory controller 14 receiving this signal instructs the method. Image memory 1
The image data is read from 3. Since the image data stored in the image memory 13 is for one field, the same field is read twice to make this one frame.

From the image memory 13, an odd field or an even field (in the case of the present embodiment, an odd field) is simultaneously read out as the read image 23 for still reproduction of FIG. 2 for each color of R, G, B. After the image quality setting circuit 15 performs the optimum processing for observation on the external monitor 5, the analog post-processing circuit 18 performs the processing such as D / A conversion, and the still image is output via the external output unit 19. The video signal for reproduction is output to the external monitor 5. And
As shown in FIGS. 4 and 5, a still reproduction image is displayed on the external monitor 5.

In FIG. 4, a so-called index image 24 in which a plurality of frames are displayed is displayed, which can be realized by reading all the image data of the image data of the image memory 13 with a high-speed clock, thinning out the image data, and reading. is there. On the other hand, in FIG. 5, the endoscopic image 25 for one frame is displayed, and this can be realized by reading the endoscopic image 25 with the same clock as at the time of photographing. The CPU 17 is operated by sequentially performing reproduction, reproduction of an arbitrary image, etc. from a keyboard (not shown) connected to the video processor 4 or an operation panel (not shown) provided in the endoscopic monitor photographing device 6. , The memory controller 14 and the image memory 13 can perform the still reproduction operation according to the designated method.

As a result, the image (still reproduced image) stored for photographing can be immediately viewed on the spot without waiting for the time required for developing the film, and thus the image is used for explanation to the patient. be able to. Further, the image memory 13 for still reproduction is also used as the image memory for photographing, and the image reproduction 13 which is conventionally used for photographing can be used as it is by performing field reproduction of the still reproduced image. Image memory 1 for one film without increasing the cost and mounting area by increasing
In 3, it is possible to reproduce the still images of two films.

In the endoscope device 1 according to this embodiment, a solid-state image sensor (not shown) is provided in the endoscope insertion portion (not shown).
The endoscope image capturing apparatus 6 of the present invention is an endoscope image obtained by capturing an image of a region to be observed with an electronic endoscope 2 having a built-in camera and processing the image signal of the solid-state image sensor with a video processor 4. Although the present invention is not limited to this, the present invention is not limited to this, and the optical guide for guiding the optical image of the observation target portion by the image guide inserted into the endoscope insertion portion and observing it at the eyepiece portion. An endoscopic image obtained by imaging an observation target region with an imaging device detachably attached to the optical endoscope using an endoscope is photographed by the endoscopic monitor imaging device 6 of the present invention. The still monitor image may be displayed on the external monitor 5.

The present invention is not limited to the above-described embodiments, but can be variously modified and implemented without departing from the gist of the invention.

[Appendix] (Appendix 1) A /
A pre-processing unit for D conversion, an image memory capable of temporarily storing the image data A / D converted by the pre-processing unit for displaying an image for each of R, G, B color components; A post-processing unit that D / A converts the image data stored in the image memory and performs signal processing, and a video signal from the post-processing unit is input to display an image for each of R, G, and B color components. In an endoscopic monitor photographing apparatus having an internal display means and a photographing means for photographing an image displayed on the internal display means, the post-processing unit processes image data stored in an image memory for photographing. An endoscope monitor photographing apparatus for endoscopes, characterized in that an external output section for outputting from the outside to the outside is provided, and a video signal from the external output section can be displayed as a still reproduction image on an external display means.

(Supplementary Note 2) A storage area for one field of already captured image data stored in the image memory can be overwritten with one field of image data for another image capturing, and a frame can be used for taking a photograph. The monitor imaging apparatus for an endoscope according to appendix 1, wherein the image is reproduced, and when being displayed on the external display device, a field image is reproduced.

(Supplementary Note 3) A detection means for detecting the end of the endoscopic examination or the start of the endoscopic examination is provided, and based on the detection result of the detection means, the endoscopic examination previously performed. 3. The endoscope monitor imaging apparatus according to item 1 or 2, wherein the image data stored in the image memory at that time can be surely erased.

(Supplementary Note 4) Image quality setting means capable of switching setting values relating to image quality between an image at the time of taking a picture displayed on the internal display means and an image at the time of still reproduction displayed on the external display means. A control means for controlling the image quality setting means so as to obtain an optimum image quality according to each mode.
The endoscope monitor imaging device according to item 3.

(Additional Item 5) The detecting means for detecting the end of the endoscopic examination or the start of the endoscopic examination is patient I
4. The endoscope monitor imaging apparatus according to appendix 3, further comprising means for detecting D input or camera attachment / detachment.

(Additional Item 6) The image memory is used as an internal display image memory for displaying on the internal display means, and is also used as an external display image memory for displaying on the external display means. The monitor imaging apparatus for an endoscope according to appendix 4.

(Additional Item 7) In the additional item 4, the image quality setting unit is a gamma conversion unit, a color tone conversion unit, a contour enhancement unit, a pedestal level changing unit, or any combination thereof. A monitor imaging device for an endoscope according to the description.

(Additional Item 8) The additional images to be displayed on the external display means are composed of index images of all images in the image memory and images for each image data. The monitor imaging device for endoscopes according to.

(Supplementary Note 9) When capturing an image in the image memory, the release operation means captures an image in a unit of one frame and writes it in the image memory in a unit of frame. In one area of the frame, one field is left, and in the area where the other one field is recorded, the one-field data of the image data for one frame captured at another timing is overwritten. When the frame image is reproduced and the image in the memory is displayed on the external display means, the field image is displayed, when the picture is taken, the frame image is reproduced, and the image in the image memory is displayed on the external display device. In this case, the endoscopic monitor imaging apparatus according to any one of appendices 1 to 4, wherein a field image is displayed.

(Additional Item 10) Of the one frame,
10. The monitor image pickup apparatus for an endoscope according to appendix 9, wherein an odd number field or an even number field is left.

[0048]

As described above, according to the present invention, an image can be used for explaining to a patient without waiting for the time required for developing the film, and the film 1 can be used.
It is possible to play back still images of two films in the image memory for each line.

[Brief description of drawings]

FIG. 1 to FIG. 5 relate to an embodiment of the present invention, and FIG. 1 is an explanatory view showing an endoscope apparatus including an endoscope monitor imaging apparatus according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing the concept of writing and reading at the time of taking a photograph and reproducing a still image of the image memory in FIG.

FIG. 3 is an explanatory view schematically showing a state of a writing area in the image memory, and FIG. 3A shows a state of the image memory in which the release operation is repeated and 20 pieces of film are written. Explanatory drawing, FIG. 3 (b) shows that after taking 20 frames from the state of FIG.
Explanatory drawing showing the state of the image memory in which the image data of the second film 10 frames is overwritten with a frame in the area of one field of the photographed image of the image memory written up to the film 20 frames. 3C is an explanatory view showing the state of the image memory at the time when the release operation and the photographing are further repeated from the state of FIG. 7B and the photographing of two films is completed.

FIG. 4 and FIG. 5 show a display example of a still reproduction image displayed on an external monitor, and FIG. 4 is an explanatory diagram showing a display example of an index image in which a plurality of frames are displayed on the external monitor.

FIG. 5 is an explanatory diagram showing a display example when one frame is displayed on an external monitor.

FIG. 6 is an explanatory view showing an endoscope apparatus including a conventional endoscope monitor photographing apparatus.

[Explanation of symbols]

1,60 ... Endoscopic device 2,61… Electronic endoscope 4, 63 ... Video processor 5, 64 ... External monitor (external display means) 6,65 ... Monitor imaging device for endoscope 7, 66 ... Shooting monitor (internal display means) 10,69 ... Camera (shooting means) 12, 77 ... Analog preprocessing circuit (preprocessing unit) 13, 76 ... Image memory 14, 75 ... Memory controller 15 ... Image quality setting circuit (image quality setting means) 17, 73 ... CPU (control means) 18, 78 ... Analog post-processing circuit (post-processing unit) 19 ... External output section 21 ... Writing image for image memory 22 ... Readout image for shooting 23 ... Read-out image for still playback 24 ... Index image 25 ... Endoscopic image

Claims (2)

(57) [Claims] 1. An A / D system which performs signal processing on an input video signal.
A pre-processing unit for D conversion, an image memory capable of temporarily storing the image data A / D converted by the pre-processing unit for displaying an image for each of R, G, B color components; A post-processing unit that D / A converts the image data stored in the image memory and performs signal processing, and a video signal from the post-processing unit is input to display an image for each of R, G, and B color components. In an endoscopic monitor photographing apparatus having an internal display means and a photographing means for photographing an image displayed on the internal display means, the post-processing of the image data stored in the image memory for photographing. An external monitor output device for outputting to the outside, and a video signal from the external output unit can be displayed as a still reproduction image on an external display means. 2. A storage field for one field of already captured image data stored in the image memory can be overwritten with one field of another image data for photography,
The endoscopic monitor image taking apparatus according to claim 1, wherein a frame image is reproduced at the time of photographing, and a field image is reproduced at the time of displaying on the external display device.