Self-adaptive bottom video mining method based on contrast resolution compensation
A technology of resolution and contrast, applied in TV, color TV, closed-circuit television system, etc., can solve problems such as inability to distinguish target images, monitoring, criminal investigation, detection difficulties, and lack of underlying video mining technology
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[0033] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0034] like figure 1 As shown in , in order to dig out videos that are difficult for human vision to distinguish under low illumination, follow the steps below:
[0035] (1) Obtain the original average grayscale of the video frame AGO .
[0036] (2) According to the average gray level AGO Obtain the optimal compensation factor for the contrast resolution of the video frame by the following formula k op , k op Also known as optimal compensation depth:
[0037] k op =2.7956 / AGO +0.0067, 0AGO ≤47;
[0038] (3) Using the optimal compensation factor, the contrast resolution of the video frame is compensated according to the following formula,
[0039] ,
[0040] In the formula, OG (x,y) represents the original grayscale of the pixel (x, y) in the image, TG (x, y) represents the compensated target gray level of the same pi...
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