blockproc - histogram for each window

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.

Answer 1

[RuiQi]

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));