Partitioning compressive sensing reconstruction method based on image block clustering and sparse dictionary learning
A block compressive sensing and sparse dictionary technology, applied in the field of image processing, can solve the problem of not using the similarity of sub-image blocks, and unable to flexibly describe different features.
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[0044] The present invention will be further described in detail below in conjunction with the drawings. The specific implementation process of the present invention is as follows.
[0045] (1) Divide an image into Sub-image blocks, the size of the sub-image in this example is .
[0046] (2) For each sub-image block Compressed sampling at the measurement rate to get the measurement ;
[0047] ,among them Is the first Pixel values of sub-image blocks, Yes Random undersampling matrix, , Yes The number of non-zero elements in, .
[0048] (3), generate the expression between 0 and 180 degrees Black and white edge images in two directions, all of the edge images PCA decomposition of the sub-image blocks to generate PCA base , Then select a DCT dictionary ,constitute The initial set-join direction dictionary of the direction basis, where Yes Matrix, this example Set to 19.
[0049] (4) Calculation versus Canonical correlation coefficient , Compare Group the sub-...
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