Method and device for improving image contrast, LCD TV (liquid crystal display television) set
An image contrast and image-in-picture technology, which is applied in TV, color TV, image communication, etc., can solve problems affecting image quality, brightness reduction, unfavorable energy saving and environmental protection, etc., and achieve improved display quality, clear layering, and improved contrast Effect
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[0027] The present invention will be further described below in conjunction with the accompanying drawings.
[0028] Such as figure 1 As shown, the method for improving image contrast of the present invention comprises the following steps:
[0029] Dynamic backlight brightness adjustment S1:
[0030] Calculate the average grayscale of all pixels in a frame of image;
[0031] Adjust the brightness of the backlight according to the preset relationship between the average gray scale and the brightness of the backlight;
[0032] Gamma compensation S2:
[0033] Determine the gamma compensation coefficient by the ratio of the original brightness of the backlight source to the adjusted brightness;
[0034] Obtain the compensated gray scale of all pixels in the image according to the gamma compensation coefficient;
[0035] Dynamic pixel grayscale adjustment S3:
[0036] Adjust the gray scale of each pixel after gamma compensation according to the preset dynamic data gray scale ...
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