JPH0440191A - Picture display device - Google Patents

Abstract

PURPOSE:To simplify the discrimination of a position while a screen made easy to see by converting either of respective video signals with different aspect ratio to the same aspect ratio as the other one and simultaneously displaying the picture corresponding to the respective video signals on the identical screen by a display control means. CONSTITUTION:A memory reading control part 15 displays a scope image on a color display 7 by a master screen, the reading control of an image memory 12 is performed by clock frequency mutched with the aspect ratio of the video signal of the scope image by the control signal of a control part 9 during the vertical synchronization V and horizontal synchronization H when displaying fluoroscopic image on a slave screen. At this time, a changeover switch 4 is switched to the output side of the image memory 12. Therefore, the above- mentioned both signals are mixed with the aspect ratio by the changeover operation of the changeover switch 4, and added to a D/A conversion part 5. As a result, the scope image and the fluoroscopic image are simultaneously displayed with the same aspect ratio on a color display 7.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to an image display device applied to, for example, an electronic endoscope device, and particularly relates to a technology for displaying multiple images of different types on the same screen. Regarding the improvement of

(Prior technology) In endoscopic examination of the lower gastrointestinal tract, there are individual differences in the position and structure of the organs to be examined, and the scope images obtained by imaging with an endoscopic scope alone are insufficient for endoscopic examination of the internal organs. Because it is difficult for the operator to determine the position and status of the mirror scope,
Linear fluoroscopy is often used.

In this case, if the scope image and the X-ray fluoroscopic image can be viewed simultaneously on the same image, the operator's work efficiency will be improved.

(Issues that the invention aims to solve!)However, X-ray fluoroscopes have traditionally had a system configuration that obtains images with an aspect ratio of 1:1, whereas endoscopes use the standard television system. Images with an aspect ratio of 4:3 can be obtained.

Using these video images with different aspect ratios as they are, two images with each video signal are displayed on the same screen.
When performing processing to simultaneously display two images, there is a problem in that one image is distorted in position according to the aspect ratio of the other image.

The present invention has been made in view of the above circumstances, and its purpose is to provide an image display device that can simultaneously display a scope image and an X-ray fluoroscopic image at the same aspect ratio on the same screen. It's about doing.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention provides an aspect ratio system that converts one of video signals with different aspect ratios to the same aspect ratio as the other one. a conversion means; and a display control for simultaneously displaying a video signal whose aspect ratio has been converted by the aspect ratio conversion means and another video signal having the same aspect ratio on respective screens corresponding to each of the video signals. It is characterized by comprising means.

(Function) With the configuration of the image display device according to the present invention, after one of the video signals with different aspect ratios is converted to the same aspect ratio as the other, the display control means displays each of the video signals on the same screen. Since the respective images corresponding to the video signals are displayed simultaneously, each part of the scope image and the X-ray fluoroscopic image can be simultaneously displayed on the same screen at the same aspect ratio based on the respective video signals.

(Embodiment) FIG. 1 is a block diagram showing the functional configuration of an image display device according to an embodiment to which the present invention is applied.

In the case of displaying an image of only a scope image, the image display device of this embodiment converts a composite video signal v1 of the scope image into an RGB video signal by a color degoder 1, and converts it into a digital RGB signal by an A/D converter 2. After writing the digital RGB signal into the image memory 3, the digital RGB signal read out from the image memory 3 is sent to the D/A converter 5 via the changeover switch 4, and the D/A converter 5 converts the KGB signal into an analog signal.
The scope image can be displayed on the color display 7 by converting the signal into a composite video signal by the color encoder 6 and sending it to the color display 7. At this time, the synchronization separation unit 8 is also added to the composite video signal v1 of the scope image. As a result, the synchronization separator 8 separates the clock signal from the composite video signal, and the control section 9
, and the control section 9 is synchronized with the clock signal to A.
It controls the operation of each section such as the /D converter 2, image memory 3, D/A converter 5, and color encoder 6.

On the other hand, in the case of image display of an X-ray fluoroscopic image, the composite video signal v2 of the X-ray fluoroscopic image is converted into an RGB video signal by the color encoder 10, and the digital RGB video signal is converted by the A/D converter 11.
After converting it into a signal and writing it into the image memory 12, it is sent from the image memory 12 to the D/A converter 5 via the changeover switch 4, and the RG signal is converted into an analog signal by the D/A converter 5.
By converting the B signal into a composite video signal by the color encoder 6 and sending it to the color display 7, an X-ray fluoroscopic image can be displayed on the color display 7. At this time, the composite video signal of the X-ray fluoroscopic image is applied to the synchronization separation section 13. As a result, the synchronization separator 13 separates the clock signal from the composite video signal, and the control unit 1
4, the control section 14 controls the operation of each section such as the A/D conversion section 11 and the image memory 12 in synchronization with the clock signal.

In this embodiment, when switching from displaying the scope image and the X-ray fluoroscopic image individually to simultaneously displaying both on the same screen, the memory reading control section 15 is used to read the image memory 12. Read control is performed.

That is, the memory read control unit 15 controls the color display 7
If the scope image is displayed on the main screen and the X-ray fluoroscopic image is displayed on the sub screen, the vertical synchronization (V) of the sub screen shown in Figure 2.
During the horizontal synchronization (H) period, readout of the image memory 12 is controlled using a control signal from the control unit 9 at a clock frequency that matches the aspect ratio of the video signal of the scope image. At this time, under the control of the system controller 16 provided as the control center of the entire system, the changeover switch 4
is switched to the output side of the image memory 12 during the VH period of the child screen.

Therefore, the video signal of the scope image and the video signal of the X-ray fluoroscopic image are mixed with the same aspect ratio by the switching operation of the changeover switch 4 and are applied to the D-A converter 5, so that the image signals on the color display 7 are A scope image and an X-ray fluoroscopic image are displayed simultaneously with the same aspect ratio.

As described above, in this embodiment, the combination of the image memory 12 and the memory readout control section 15 functions as an aspect ratio conversion means, and the combination of the changeover switch 4 and the system controller 16 functions as a display control means, and the color display 7 It is possible to eliminate the positional distortion of the displayed image.

In this embodiment, reading control of the image memory is performed in order to convert the aspect ratio, but the aspect ratio may also be converted using the writing system.

Therefore, according to this embodiment, when an operator operating an endoscope is performing a lower gastrointestinal tract examination under X-ray fluoroscopy, the screen becomes easier to see and the position can be easily determined. . As a result, the examination time for the lower gastrointestinal tract examination can be shortened, thereby making it possible to significantly reduce the patient's suffering time.

[Effects of the Invention] As explained above, according to the present invention, when images based on video signals having different aspect ratios are simultaneously displayed on the same screen, the aspect ratios of the images are the same on the same screen. Therefore, the conventional problem that one image becomes difficult to see due to positional distortion can be solved all at once.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the functional configuration of an image display device according to an embodiment of the present invention, and FIG. 2 is a diagram schematically showing an example of read control of an image memory. 1... Color decoder 2... A/D converter 3.
...Image memory 4...Selector switch 5...
D/A converter 6...color encoder 7...
Color display 9...Control section 11...A/D conversion section 13...Synchronization separation section 15...Memory read control section Troller 8...Synchronization separation section 10...Color decoder 12...・Image memory 14...control unit 16...system controller

Claims (1)

[Claims] (1) Aspect ratio converting means for converting one of video signals with different aspect ratios to the same aspect ratio as the other; and a video signal whose aspect ratio is converted by this aspect ratio converting means and a video signal with the same aspect ratio. An image display device comprising display control means for controlling simultaneous display of other video signals on respective screens corresponding to the respective video signals.