Two-stage image denoising method based on adaptive singular value threshold
An adaptive, singular value technology, applied in the field of image processing, which can solve the problems of visual artifacts and scratches, texture and details, poor reconstruction and computational cost.
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[0066] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0067] like figure 1 shown, including the following steps:
[0068] Step 1: Estimate the noise standard deviation σ from the median absolute deviation (MAD) in the wavelet coefficients;
[0069] Step 2: After the image is divided into blocks, the image blocks are grouped by the Euclidean distance criterion, and the formed similar image blocks are formed into a similar group matrix P j .
[0070] 1) Divide the image into The image blocks of size are grouped by the following similarity measure formula,
[0071] (1)
[0072] where ||*|| 2 Indicates the Euclidean distance, y j is the reference block, y c represent candidate blocks. select from y j The nearest L s...
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