how to divide the RGB color space into 64 cubic blocks ?

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SAM 2013-12-27

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评论： SAM 2013-12-29

Hello

can any one tell me how to to divide the RGB color space into 64 cubic blocks with four equal partitions along each dimension.

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John D'Errico 2013-12-27

编辑：John D'Errico 2013-12-27

How? You do it. Whats the problem? All that matters is what you will do with it, and only you know that.

SAM 2013-12-28

编辑：SAM 2013-12-28

i want to compute color distribution, distinguishing multi-colored images from monochromatic, sepia or simply low contrast images.

and i want to use each cube as a sample point for my further process.

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采纳的回答

Image Analyst 2013-12-27

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编辑：Image Analyst 2013-12-27

在 MATLAB Online 中打开

color_gamut_visualizer.m

Like John said, it depends on what you will do with it - how you will use it. If you want to make a histogram, you need to find out what block you're in

for col = 1 : cols
  for row = 1 : rows
    % Get the RGB values of the image.
    rValue = rgbImage(row, col, 1);
    gValue = rgbImage(row, col, 2);
    bValue = rgbImage(row, col, 3);
    % Find out which of the 64 blocks they belong to.
    % Block numbers range from 1 to 4.
    rBlock = ceil(rValue / 64);
    gBlock = ceil(gValue / 64);
    bBlock = ceil(bValue / 64);
    % Increment the histogram.
    rgbHist(rBlock, gBlock, bBlock) = rgbHist(rBlock, gBlock, bBlock) + 1;
  end
end