K-SVD (K-means singular value decomposition) speckle inhibiting method based on SAR (synthetic aperture radar) image local statistic characteristic
A technology of coherent speckle suppression and local statistics, applied in the field of image processing, it can solve a large number of speckle noise, edge blurring and other problems, and achieve the effect of wide applicability, clear edge texture and good radiation characteristics.
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[0042] refer to figure 1 , the implementation of the present invention is as follows:
[0043] Step 1, take the sliding factor as s=1, and the size is The window of the input size is The SAR image I, such as figure 2 and image 3 As shown, the image overlapping block extraction operation is performed to obtain a set of overlapping block vectors where y i is the ith overlapping block vector, M is the number of overlapping block vectors, and
[0044] M = ( N - n + 1 ) 2 .
[0045] Step 2, for the set of overlapping block vectors Perform random sampling to obtain a training sample set where y i ' is the i-th training sample, M' is the number of training samples, and 0
[0046] Step 3. According to the redundant sparse representation image noise su...
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