Mercurial > hg > smallbox
view Problems/private/col2imstep.m @ 55:435da1dc71a0
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author | idamnjanovic |
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date | Mon, 14 Mar 2011 16:55:49 +0000 |
parents | 51b76c31c93d |
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%COL2IMSTEP Rearrange matrix columns into blocks. % A = COL2IMSTEP(B,[MM NN],[N1 N2]) rearranges the columns of B into % sliding N1-by-N2 blocks producing the matrix A of size MM-by-NN. B is % usually the result of calling IM2COLSTEP(...) with a stepsize of 1, or % using Matlab's IM2COL(..,'sliding'). Overlapping blocks are summed in A. % % A = COL2IMSTEP(B,[MM NN],[N1 N2],[S1 S2]) arranges the blocks in A with % a step size of (S1,S2) between them. The first block is at A(1:N1,1:N2), % and the rest are at A((1:N1)+i*S1,(1:N2)+j*S2). Overlapping blocks are % summed in A. Note that B is usually the result of calling % IM2COLSTEP(...) with a stepsize of [S1 S2]. % % A = IM2COLSTEP(B,[MM NN KK],[N1 N2 N3],[S1 S2 S3]) generates a 3-D % output matrix A. The step size [S1 S2 S3] may be ommitted, and defaults % to [1 1 1]. % % See also IM2COLSTEP, IM2COL, COUNTCOVER. % Ron Rubinstein % Computer Science Department % Technion, Haifa 32000 Israel % ronrubin@cs % % August 2009