I want RGB to HSV conversion. What changes are required in the following code?

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SHUBHDEEP KAUR
SHUBHDEEP KAUR 2018-9-26
评论： Walter Roberson 2018-9-26
X = im2double(imread('path'));
R = X(:,:,1);
G= X(:,:,2);
B = X(:,:,3);
z = zeros(size(R));
Rimg = cat(3, R, z, z);
Gimg = cat(3, z, G, z);
Bimg = cat(3, z, z, B);
L256 = linspace(0,1,256).';
z256 = zeros(256,1)
mapR= [L256, z256, z256];
mapG= [z256, L256, z256];
mapB = [z256, z256, L256];
figure; image(Rimg); colormap(mapR); colorbar();
figure; image(Gimg); colormap(mapG); colorbar();
figure; image(Bimg); colormap(mapB); colorbar();
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Guillaume
Guillaume 2018-9-26
Indeed it is very unclear what the code given has got to do with conversion to HSV which is trivially achieved with rgb2hsv.
The whole code is simply a very complicated way of achieving the same as:
X = im2double(imread('path'));
figure; imshow(X .* cat(3, 1, 0, 0));
figure; imshow(X .* cat(3, 0, 1, 0));
figure; imshow(X .* cat(3, 0, 0, 1));

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回答（1 个）

Image Analyst
Image Analyst 2018-9-26
Your code doesn't do anything useful at all. Abandon it all, except the imread() and try this:
hsvImage = rgb2hsv(X);

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