Method and device for performing histogram equalization processing on image
A technique of histogram equalization and histogram statistics, applied in the field of image processing, to achieve the effect of enhancing contrast
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Embodiment 1
[0023] The embodiment of the present invention proposes a histogram weighted equalization method, so that the enhanced image conforms to the visual habit of human eyes.
[0024] This embodiment provides a processing flow of a method for performing histogram equalization processing on an image as follows: figure 1 As shown, the following processing steps are included:
[0025] Step S110, calculating the distance between each pixel point in the image and the central pixel point.
[0026] The embodiment of the present invention first needs to calculate the distance between each pixel point in the image and the central pixel point. Taking an image whose length is L and width is H as an example, the coordinates of the central pixel point O of the above image are (L / 2, H / 2). Assuming that the coordinates of a certain pixel point m in the image are (x, y), the distance between the above-mentioned certain pixel point M and the central pixel point O is:
[0027] D ...
Embodiment 2
[0062] This embodiment provides a device 300 for performing histogram equalization processing on images, and its specific implementation structure is as follows image 3 As shown, it can specifically include the following modules:
[0063] Distance calculation module 310, for calculating the distance between each pixel point in the image and the central pixel point;
[0064] The weight calculation module 320 is used to calculate the histogram statistical weight of each pixel in the image according to the distance between each pixel in the image obtained by the distance calculation module and the central pixel;
[0065] The weighted gray histogram statistics processing module 330 is used to perform weighted gray histogram statistics of each gray level on the image based on the histogram statistical weight of each pixel in the image obtained by the weight calculation module;
[0066] The histogram equalization processing module 340 is configured to perform histogram equalizatio...
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