Self-adapting image enhancement method
An image enhancement and self-adaptive technology, applied in image enhancement, image data processing, instruments, etc., can solve the problems of complex calculation, easy amplification of noise, unsatisfactory image enhancement effect, etc., to achieve simple calculation, suppress noise, good brightness and The effect of contrast
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[0029] The flow chart of the present invention is as figure 1 As shown, it includes steps: 1. Set the threshold according to the gray scale range of the image; 2. Perform automatic level enhancement for images smaller than the threshold; 3. Enhance methods based on histogram equalization and inverse equalization transformation for images larger than the threshold.
[0030] Each step is as follows:
[0031] Step 1: Set the threshold according to the gray scale range of the image
[0032] All images can be divided into low-contrast images and high-contrast images according to their gray scale range, and high-contrast images include bimodal images, that is, partially dark and partially bright images. Set an appropriate threshold k d , the number of grayscale pixels greater than 20 is regarded as an effective grayscale, and the maximum grayscale k is obtained according to the effective grayscale max and minimum gray level k min , when the gray level difference k max -k min l...
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