HSV to RGB using entered values

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evangeline 2014-1-21

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https://ww2.mathworks.cn/matlabcentral/answers/113098-hsv-to-rgb-using-entered-values

评论： evangeline 2014-1-21

I have used the rgb2hsv and changed my rgb image to hsv, then asked the user to enter new h and s values .. now I want to create the new rgb image with these new h and s and v values, could anyone help me with it? how can I combine these hsv seprate values into one rgb image?

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Answer 1

evangeline 2014-1-21

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https://ww2.mathworks.cn/matlabcentral/answers/113098-hsv-to-rgb-using-entered-values#answer_121610

H=im3(:,:,1); S=im3(:,:,2); V=im3(:,:,3); I seprated the hsv values with these commands, now I want to change the hsv values and combine them into one rgb image

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Bjorn Gustavsson 2014-1-21

在 MATLAB Online 中打开

Assuming you original image is im:

hsv = rgb2hsv(im); % HSV version of original image
HSV = hsv;         % HSV version of image we're modifying
HSV(:,:,1) = mod(hsv(:,:,1)+0.2,1); % Shift the hue component, this is not pretty...
HSV(:,:,2) = hsv(:,:,2).^.75;       % Change the saturation
IM = hsv2rgb(HSV);                  % Convert back to RGB
subplot(1,2,1),imagesc(im)          % display anf compare 
subplot(1,2,2),imagesc(IM)          % the 2 images

Obviously you'll haveto modify the H&S modification to what you want to achieve...

HTH

evangeline 2014-1-21

thank u so much

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Answer 2

Bjorn Gustavsson 2014-1-21

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https://ww2.mathworks.cn/matlabcentral/answers/113098-hsv-to-rgb-using-entered-values#answer_121609

Why cant you use hsv2rgb? It's also not clear to me how you have your users entering new hue and saturation values - do you really expect them to give new parameters pixel-by-pixel, that would be a very large number of numbers to enter for anyone...