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divide RGB color space into 16x16x16 bins

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Elysi Cochin
Elysi Cochin 2018-1-3
回答： Guillaume 2018-1-3
How to divide RGB color space into 16x16x16 bins.
And then calculate the number of the bins, into which there are pixels to be divided

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Guillaume
Guillaume 2018-1-3
Assuming your image is of type double (i.e: intensity range is 0-1), then:
bins = linspace(0, 1, 16); %if image is uint8, then linspace(0, 255, 16)
bincoords = discretize(rgbimage, bins);
bincoords(row, col, :) is a 3 element vector giving you the location of pixel(row, col) into that 16x16x16 histogram cube. If you want to change that into linear indices:
bincoordslinear = sub2ind([16 16 16], bincoords(:, :, 1), bincoords(:, :, 2), bincoords(:, :, 3));

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