JPS63200733A - Endoscope apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application 1] The present invention relates to an endoscope apparatus capable of displaying a negative image on a photographing monitor and photographing it on a negative film.

[Prior Art and Problems to be Solved by the Invention] In recent years, endoscopes that can inspect internal organs in a body cavity by inserting an elongated insertion section into the body cavity have come into wide use.

In endoscopy, a diagnosis is made not only by observing the inside of the body cavity during the examination, but also by taking appropriate photographs during the examination, reviewing the film after the examination, and making the final diagnosis in conjunction with the biopsy results. A common method is to lower the At that time, it is common to use a conventional beam versal film and view it with a projector or Schaukasten.

This reversal film has problems in terms of price, such as poor availability and high purchase and development costs. On the other hand, in recent years, methods have been proposed for observing endoscopic images on a monitor, but even in this case, still images are stored on film rather than on magnetic media. Awards are still being made. This is because film has advantages such as being able to see the contents with the naked eye without using any equipment, being easy to fill, and not taking up much file space. There is also a method of playing the video using a VTR, but this requires the same amount of time as the test, so the time required per patient increases and the total time increases significantly when dealing with a large number of patients. Furthermore, there are drawbacks such as the fact that a huge amount of space is required to store the VTR tapes.

[Object of the Invention] The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide an endoscope system that performs monitor observation with reduced user running costs regarding photographic shadows.

[Means and effects for solving the problems] The endoscope device according to the present invention displays a negative image on a photographing monitor by providing a positive/negative conversion circuit as an image processing device, and photographs this on a negative film. By doing so, a positive image can be obtained.

Embodiment 1 FIG. 1 is an explanatory diagram of the configuration of an endoscope apparatus showing a first embodiment.

In FIG. 1, an objective lens 3 is disposed inside the distal end of an elongated, for example, flexible insertion section 2 of an endoscope 1, and a solid-state image sensor 4, for example, is disposed behind the objective lens 3, and a solid-state image sensor 4 is disposed behind the endoscope. A wire 6 passes through the insertion section 2 and connects to the electrical video signal output device 7.
The video processing circuit 8 is connected to the built-in video processing circuit 8.

The video processing circuit 8 is connected to a viewing monitor 9 and an image processing device 11. The image processing device @11
is connected to a photographing monitor 17 built into a device 16 comprising a positive/negative conversion circuit 12, a color IIm adjustment circuit 13, and a film setting switch 14. Inside the photographing device 16, a negative color film 19 is removably disposed facing the a-shadow monitor 17 and behind the photographing lens 18.

The image signal from the solid-state image sensor 4 is converted into a standard video signal by a video processing circuit 8 and then sent to a positive/negative conversion circuit 1.
2, it is converted into a negative signal and sent to the color all adjustment circuit 13. Since each film has different spectral sensitivity characteristics, the color Wiml adjustment circuit 13 adjusts the color tone so that the appropriate color is produced for each film set by the film setting switch 14. The standard video signal whose color tone has been adjusted is displayed on the photographing monitor 17.

The image processing device 11 includes a γ conversion circuit (not shown), which increases the γ characteristic displayed on the photographing monitor 17 to, for example, about 2.2. This is generally a negative color film 19
This is because the γ characteristic of is flat.

Further, the photographing device 16 is provided with an automatic exposure mechanism (not shown).

According to this embodiment, a negative image can be obtained on the photographing monitor 17, and by photographing this with the negative color film 19, the price of the film used can be reduced.

2 and 3 relate to the second embodiment, where FIG. 2 is an explanatory diagram of the configuration of an endoscope apparatus, and FIG. 3 is an explanatory diagram of a color chart.

In FIG. 2, an elongated insertion section 2 of an endoscope 1 is shown.
For example, a solid-state image sensor 4 is disposed at the tip of the solid-state image sensor 4, and behind it a signal line 6 is inserted through the insertion section 2 and connected to an electric video signal output device 7.

The electric video signal output device 7 includes a video process circuit 8
, a freeze circuit 21 and a freeze switch 22. The freeze circuit 21 is connected to the observation monitor 9
and is connected to the image processing device 11. Image processing device 1
1 is composed of a positive/negative conversion circuit 12, a color tone adjustment circuit 13, and a color tone adjustment knob 23. Further, the image processing device 11 is connected to a photographing monitor 17 of the a-shadow device 16. The photographing device 16 is a photographing monitor 17.
A storage section 24 containing a built-in negative color film 19 facing the photographing monitor 17;
A removable optical filter 26, a photographing lens 18, and a negative color film 19 having spectral transmission characteristics corresponding to
The camera section 27 is rotatable so that an observer can visually view the photographing monitor 17.

The image signal from the solid-state image sensor 4 is converted into a standard video signal by a video processing circuit 8, and then sent to a freeze circuit 21 consisting of an A/D + frame memory 10/A.
sent to. The freeze circuit 21 is a freeze switch 22
Pressing once will freeze the image, and pressing it again will release it. This is used when observing fast-moving parts in detail. Freeze circuit 2
The video signal from 1 is sent to the observation monitor 9 and the image processing device 1.
1 is converted to negative by the built-in positive/negative conversion circuit 12 and the color lI! Enter the adjustment circuit 13. Color tone adjustment circuit 13
is provided with a color tone adjustment knob 23 that can manually adjust the color tone of the photographing monitor 17.

The negative converted standard video signal from the image processing device 11 is sent to the photographing monitor 17. sent to display a negative image.

Since the colors of monitors such as CRTs vary widely even if they are of the same model, it is preferable to perform color adjustment for each monitor. Furthermore, since the spectral sensitivity characteristics of a film are generally different from the spectral emission characteristics of a monitor, it is difficult to photograph the colors of the monitor as they are. Generally, the color tends to be bluish.

In other words, it is possible to make the color on the photographing monitor 17 more red than it actually is, but it is inconvenient because it is difficult to know how much redness to make and how it will appear until you take the photograph. So the color mI
Adjust the observation monitor 9 and photographing monitor 17 using the I adjustment circuit 13 and the color II adjustment knob 23 so that the colors are the same, and install a roughly reddish or magenta optical filter 26 to achieve the correct color. Now you can get different colors.

FIG. 3 shows a color chart 28. The color chart is disc-shaped with three concentric circles arranged in color, the innermost circle is colored black, the outermost circle is colored white, and the area between the two circles is divided into eight colors in the circumferential direction. has been done. Said 8
The colors are arranged so that the negative/positive relationship is diagonal to each other, such as yellow to blue, magenta to green, cyan to red, and black to white. There is.

In FIG. 3, the viewer can use the color m adjustment knob 23 to make adjustments while comparing the viewing monitor 9 and the photographing monitor 17 so that the colors in the positive/negative relationship are the same. By doing so, it is possible to eliminate the influence of individual color differences between the monitors and the conversion characteristics of the positive/negative conversion circuit 12. At this time, when the photographing monitor 17 is viewed upside down, the colors are arranged in diagonal positions such as yellow for blue, magenta for green, and cyan for red so that the colors are in the same position. In the color chart 28, for example, the blue displayed on the observation monitor 9 and the blue displayed on the photographing monitor 17 (color chart 28
(yellow) have the same brightness.

The center of the color chart 28 is black, the periphery is white, and each color is arranged on an arc. This is because the illumination device (not shown) of endoscopy tA1 (consisting of a light guide fiber and illumination lens) does not illuminate the subject uniformly; the center is bright and the periphery is dark, and the same color from the center to the periphery. This is because when you look at the part, even the color may appear to change due to changes in brightness. In this embodiment, since the radial width of the colored portion is narrowed to some extent, almost uniform brightness can be obtained.

In the color chart 28, since the center is black as described above, regular reflection of illumination light is less likely to occur and adjustment is easy.

You can also make a hole in this black part. The reason why the surrounding area is white is that this embodiment has an automatic light control function (not shown), which automatically adjusts the illumination light needle so that the overall brightness of the screen is appropriate. On the other hand, this is to prevent a situation where, for example, if the periphery is black, there will be many black areas on the screen, and the colored areas will be too much, making it unsuitable for color adjustment. In other words, colored parts are displayed with intermediate brightness.

Note that when performing color adjustment, the use of the freeze circuit 21 facilitates the work. For that purpose, freeze circuit 2
1 needs to be placed before the color tone adjustment circuit 13.

The color chart 28 displays symbols indicating positive and negative pairs so that comparison positions can be easily understood. There is also a UP mark.

FIG. 4 is an explanatory diagram of a color chart showing the third embodiment.

In FIG. 4, the color chart 29 is disk-shaped and has eight colors divided in the circumferential direction.

Furthermore, draw concentric circles with black lines. By doing so, the range of interest can be determined during color adjustment.

In order to make the light distribution uniform on the monitor, the color chart 29 may be shaped like a cone with an apex angle of about 100 degrees, or it may be shaped like a hemisphere.

[Effects of the Invention] As described above, according to the present invention, since a photographing monitor that displays a negative display is provided, it is possible to take photographs using negative film, which has the effect of reducing user running costs related to photographing. . Another advantage is that negative color film has a wider latitude, or exposure latitude, than universal film, so even if there is a slight error in the exposure settings, the image can be taken with the correct exposure. Furthermore, some automatic developing machines for negative film have a very fast development time of about 25 minutes, which has the advantage of allowing image interpretation and diagnosis to be completed within the same day.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the configuration of an endoscope apparatus showing the first embodiment, FIGS. 2 and 3 are related to the second embodiment, and FIG. 2 is an explanatory diagram of the configuration of the endoscope apparatus, and FIG. is an explanatory diagram of the color chart,
FIG. 4 is an explanatory diagram of a color chart showing the third embodiment. 1... Endoscope 7... Electric video signal output device 9... Observation monitor 11... Image processing device 12... Positive/negative conversion circuit 17... Photographing monitor Fig. 1 I8 16 Figure 3 Procedure Nefu Authorized Letter (Spontaneous) June 22, 1985 Commissioner of the Patent Office Kuro 1) Mr. Yu Ming
1. Indication of the case Patent Application No. 034025 of 1988 2. Name of the invention Endoscope device 3. Relationship with the case of the person making the amendment Representative Satoshi Shimoyama of the patent applicant Department 5. Amendment order Date (voluntary) 6. Subject of amendment Column 7, "Claims" of the specification, Contents of amendment As shown in the attached document, the scope of claims will be amended as follows. [(1) An endoscope body that has an objective optical system at the tip of the insertion section, and outputs the endoscopic image obtained by the objective optical system as an electric image signal that is not converted into a positive/negative image and an electric image signal that is converted into a positive/negative image. a first display means for inputting and displaying an electrical video signal that has not been converted into a positive/negative state; a second display means for inputting and displaying an electrical video signal that has been converted into a positive/negative state; 1. An endoscope apparatus comprising: 1 means for displaying the display contents of the 2 display means in a negative I mode. (2) Item 1 of the claim, characterized in that a color tone adjustment chart consisting of a plurality of pairs of colors having a positive and negative relationship and a color tone adjustment means for the second display means are provided. Viewing device. ”

Claims (2)

[Claims] (1) The endoscope body has an objective optical system at the tip of the insertion section, and the endoscopic image obtained by the objective optical system is output as an electric image signal that is not converted into a positive/negative signal and an electric image signal that is converted into a positive/negative image. a signal processing means; a first display means for inputting and displaying an electrical video signal that has not been converted into a positive/negative; a second display means for inputting and displaying an electrical video signal that has been converted into a positive/negative; 1. An endoscope apparatus comprising an imaging means for taking a negative image of the display contents of the display means. (2) Item 1 of the claim, characterized in that a color tone adjustment chart consisting of a plurality of pairs of colors in a positive and negative relationship and a color tone adjustment means for the second display means are provided. Viewing device.