Image nonlinearity enhancement method based on histogram subsection transformation
A segmentation transformation and histogram technology, which is applied in the field of image processing, can solve the problems of image contrast enhancement, can not meet the visual characteristics of human eyes, and the image visual effect is stiff, and achieves the effect of increasing magnification and good visual effect.
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[0028] Hereinafter, preferred embodiments of the present invention are given in conjunction with the drawings to illustrate the technical solutions of the present invention in detail. It should be noted that the implementation of the image nonlinear enhancement method based on the histogram piecewise transformation according to the present invention is merely an example, but the present invention is not limited to this specific implementation.
[0029] Such as figure 1 As shown, the image nonlinear enhancement method based on histogram segment transformation of the present invention includes the following steps:
[0030] S1. Calculate the probability density distribution of the image gray level. Assuming that the quantization of the image gray level is 8bit, the image gray range is [0, 255]. If the total pixels of an image are n, there are a total of L gray levels, n k Represents the kth gray level r k The frequency of occurrence, then the probability p of the k-th gray level app...
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