How I can divide a color image in to blocks and access the RGB of each individual block?

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syed musa 2013-6-7

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https://ww2.mathworks.cn/matlabcentral/answers/78383-how-i-can-divide-a-color-image-in-to-blocks-and-access-the-rgb-of-each-individual-block

I have tried using blockproc(), but could not get it.

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Answer 1

Image Analyst 2013-6-7

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https://ww2.mathworks.cn/matlabcentral/answers/78383-how-i-can-divide-a-color-image-in-to-blocks-and-access-the-rgb-of-each-individual-block#answer_88094

See the FAQ: http://matlab.wikia.com/wiki/FAQ#How_do_I_split_an_image_into_non-overlapping_blocks.3F

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syed musa 2013-6-11

Sir, Could you help me in extracting the shape of a object in color image

Image Analyst 2013-6-11

在 MATLAB Online 中打开

% Extract the individual red, green, and blue color channels.
redChannel = rgbImage(:, :, 1);
greenChannel = rgbImage(:, :, 2);
blueChannel = rgbImage(:, :, 3);
% Threshold
redBlobs = redChannel > 200 & greenChannel < 40 & blueChannel < 70; % or whatever.
labeledImage = bwlabel(redBlobs);
measurements = regionprops(labeledImage, 'all');
allAreas = [measurements.Area];
allPerimeters = [measurements.Perimeter];
allECD = [measurements.EquivDiameter];
allCircularities = allPerimeters.^2 ./ (4 * pi * allAreas);