No-reference image definition detection method
A technology of image clarity and detection method, applied in the field of image processing, can solve the problems of inconsistency in definition, missed detection of video images, and inconspicuous distinction.
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[0022] In order to clearly illustrate the technical route and solution of the present invention, the specific implementation of each step in the present invention will be described in detail in conjunction with the accompanying drawings by taking the definition detection of an image as an example. These examples are illustrative, not limiting of the invention.
[0023] Step 1: Calculate the gradient map {Gx, Gy} according to the existing grayscale image; use the public edge detection algorithm to locate strong edge points.
[0024] The gradient map uses common gradient operators such as Sobel, and the edge detection algorithm can use Canny edge detection operators. Strong edge points are edge pixels detected by the edge detection algorithm.
[0025] Step 2: Calculate the edge width of the strong edge point, and count the cumulative edge width histogram EdgeWidthHist.
[0026] The calculation of the edge width, such as figure 1 As shown, at a strong edge point, compare the ab...
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