Exposure device and exposure method for electronic endoscope

Abstract

The invention discloses an exposure device and an exposure method for an electronic endoscope. The exposure device comprises an image detection module, an image processing module and an image output module, wherein the image detection module comprises an image detector, a brightness statistics module and a shutter value control module. The exposure method comprises the following steps: transmitting a video signal of a detection region to the brightness statistics module by the image detector, obtaining a current brightness value Yc and a target brightness value Ya through the brightness statistics module, and transmitting the current brightness value Yc and the target brightness value Ya to the shutter value control module; calculating a target shutter value Sa and controlling a shutter to reach proper exposure quantity by the shutter value control module; sending the video signal of the detection region under the proper exposure quantity to the image processing module by the image detector; performing image processing on the received video signal by the image processing module, and transmitting the processed video signal to the image output module for outputting. According to the exposure device and the exposure method, a detection image is relatively clear, a situation of overexposure or over-darkness is avoided, the exposure speed is increased, and the problems of dazzling and flickering of the image are solved.

Description

technical field [0001] The invention relates to an electronic endoscope imaging system, in particular to an electronic endoscope exposure device and an exposure method. Background technique [0002] The current automatic exposure method of the image detector is mainly done automatically by the detector. The detector extracts the brightness information of each frame of the video signal to calculate the brightness value while passing the collected video signal, and then sets the shutter value to control the exposure. . The automatic exposure of the existing image detector is mainly based on the comparison of the brightness value of each frame with the target brightness value and the threshold value, and adopts the method of fixed step size and equal step adjustment to set the exposure amount at which the shutter value reaches the target value. [0003] The shutter value is set in a fixed step mode, and when the contrast between the main subject and the background in the image...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the defects in the above-mentioned prior art, the purpose of the present invention is to provide an electronic endoscope exposure device and exposure method, so that the quality of the image is clearer, there is no overexposure or overdarkening, the exposure speed is improved, and the solution is solved. Solved the problem of dazzling and flickering images

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