I want code to convert color image to rgb color spaces exactly
2 views (last 30 days)
Show older comments
venmal devi
on 2 Sep 2015
Commented: Walter Roberson
on 2 Sep 2015
I want code to convert color image to rgb color spaces exactly
2 Comments
Image Analyst
on 2 Sep 2015
What does that mean? Why is your color image not already RGB? What color space is it in, and how did you create it in that color space? http://www.mathworks.com/matlabcentral/answers/728-how-do-i-write-a-good-question-for-matlab-answers
Walter Roberson
on 2 Sep 2015
Edited: Walter Roberson
on 2 Sep 2015
In a duplicate Question, the user posted
X=imread('images.jpg'); R = X(:,:,1); image(R), colormap([[0:1/255:1]', zeros(256,1), zeros(256,1)]), colorbar;
%Green Component G = X(:,:,2); figure; image(G), colormap([zeros(256,1),[0:1/255:1]', zeros(256,1)]), colorbar;
%Blue component B = X(:,:,3); figure; image(B), colormap([zeros(256,1), zeros(256,1), [0:1/255:1]']), colorbar;
Accepted Answer
Walter Roberson
on 2 Sep 2015
X = im2double(imread('images.jpg'));
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();
2 Comments
Walter Roberson
on 2 Sep 2015
I do not know what you mean by a "black gray image" ? Please capture a portion of the screen and post the image.
More Answers (0)
See Also
Categories
Find more on Colormaps in Help Center and File Exchange
Products
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!