Grayscale of RGB channels

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SNEHA P S 2017-7-13

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https://ww2.mathworks.cn/matlabcentral/answers/348600-grayscale-of-rgb-channels

编辑： Jan 2017-7-18

采纳的回答： Jan

Is it possible to convert the matrix values of R, G and B channels to its own grayscale values respectively?

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SNEHA P S 2017-7-18

Am not sure that whether the R G and B matrices itself display grayscales ?

Adam 2017-7-18

Each of the R, G and B channels can already be considered greyscale by itself. Whether it is useful to do so or not is another matter, but you haven't given any information so it's impossible to say.

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采纳的回答

Jan 2017-7-18

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https://ww2.mathworks.cn/matlabcentral/answers/348600-grayscale-of-rgb-channels#answer_274565

编辑：Jan 2017-7-18

在 MATLAB Online 中打开

RGB = rand(100, 100, 3);   % RGB array
R   = RGB(:, :, 1);        % Gray image of the red channel
G   = RGB(:, :, 2);        % Gray image of the green channel
B   = RGB(:, :, 3);        % Gray image of the blue channel
figure
image(R)
figure
image(cat(3, R, R, R))