col2im - Rearrange matrix columns into blocks
Syntax
A = col2im(B,[m n],[mm nn],'distinct')
A = col2im(B,[m n],[mm nn],'sliding')
Description
A = col2im(B,[m n],[mm nn],'distinct') rearranges
each column of B into a distinct m-by-n block
to create the matrix A of size mm-by-nn.
If B = [A11(:) A21(:) A12(:) A22(:)], where each
column has length m*n, then A = [A11
A12; A21 A22] where each Aij is m-by-n.
A = col2im(B,[m n],[mm nn],'sliding') rearranges
the row vector B into a matrix of size (mm-m+1)-by-(nn-n+1). B must
be a vector of size 1-by-(mm-m+1)*(nn-n+1). B is
usually the result of processing the output of im2col(...,'sliding') using
a column compression function (such as sum).
col2im(B,[m n],[mm nn]) is the same as col2im(B,
[m n], [mm nn],'sliding').
Class Support
B can be logical or numeric. The return value A is
of the same class as B.
Examples
B = reshape(uint8(1:25),[5 5])'
C = im2col(B,[1 5])
A = col2im(C,[1 5],[5 5],'distinct')
See Also
blockproc, colfilt, im2col, nlfilter
 | checkerboard | | colfilt |  |
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