Large scale enlarging method with high performance for digital image based on subspace decomposition
A subspace decomposition, digital image technology, applied in image enhancement, image data processing, complex mathematical operations, etc.
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[0069] (1) determine block size, carry out block to digital image;
[0070] (2) According to the adopted one-dimensional interpolation operator, determine whether to perform bordering on the block operator: the number of columns to be bordered on the left and right sides of each sub-graph is: o=p / 2-1, p is one-dimensional interpolation The length of the operator, which is an even number. For example, the length of the nearest neighbor interpolation and linear interpolation operators is 2, so no fringing is required, and the length of the cubic interpolation operator is 4, and one column of fringing is required. Set the size of the sub-picture block after bordering as M*L ', L'=L when not bordering; Just enter the next step directly when not needing bordering;
[0071] (3) Fast SVD is performed on each sub-graph, that is, only L' singular values and 2L' singular vectors are calculated;
[0072] (4) Perform one-dimensional interpolation on 2L' singular vectors. Any existing...
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