blockproc - histogram for each window

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RuiQi
RuiQi 2017-5-17
回答： RuiQi 2017-5-17
I read that blockproc allows me to create custom functions that will process sub-images in a sliding window fashion. I am not sure however, how I can accumulate the histogram of each sub-image. My input is an 8 bit image. The output should thus be a 3 dimensional array of [rows x cols x 256].
B = blockproc(A,[10 10],@histogram_function_here);
I hope someone can give me a link or some tips or the code itself.

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RuiQi
RuiQi 2017-5-17
Managed to find a sample code at http://stackoverflow.com/questions/15250647/matlab-blockproc-store-vector-result-as-3rd-dimension
function [ counts ] = getHist( block )
[counts,]=hist(block.data(:), 1:256);
counts = shiftdim(counts,-1);
end
HistA = blockproc(lbp, [3 3], @(block_struct) getHist(block_struct));

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