Real-time video image enhancement method and high-speed camera system

The invention discloses a real-time video image enhancement method and a high-speed camera system. The method comprises the following steps of acquiring a gray level image of an output image of a high-speed camera and an average gray level value and a pixel bit width thereof in real time; setting an illumination judgment threshold value based on the pixel bit width and constructing a gray level distribution table; obtaining an illumination scene and a fusion coefficient based on the average gray value and an illumination judgment threshold; fusing the gray level distribution table and the first mapping table based on the fusion coefficient to obtain a second mapping table; and replacing the gray value of the pixel point in the gray image with the mapping value of the gray value in the second mapping table to obtain an enhanced image. By automatically identifying the illumination scene of the to-be-processed image, and adaptively setting the second mapping table according to the illumination scene and the to-b