how to convert a gray scale image to color image using matlab

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learningmat on 11 Sep 2013
Answered: David Mills on 22 Feb 2017
Hi all, Is there any possibility to convert ab gray scale image into color image.If so, kindly suggest me.
Thanks in advance

Answers (4)

sidra on 11 Sep 2013
Nirmala , try the following , its a very simple and efficient code to convert grayscale images to RGB using a specified colormap.
Image Analyst
Image Analyst on 12 Sep 2013
I believe I heard that most of that was done "by hand" - by artists - with some help from digital computers to continue colors onto the next frame. See

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Jan on 11 Sep 2013
It depends on how the converted image should look like, so please explain any details. Examples:
Gray = rand(200, 200);
RGB1 = cat(3, Gray, Gray, Gray); % information stored in intensity
RGB2 = Gray;
RGB2(end, end, 3) = 0; % All information in red channel
GrayIndex = uint8(floor(Gray * 255));
Map = jet(255);
RGB3 = ind2rgb(GrayIndex, Map);
And there are many many other possible solutions.
Image Analyst
Image Analyst on 11 Sep 2013
What happened to A? Why is it no longer available in your code? Did you use "clear" to get rid of it? If so, just don't do that and you'll have the original A.

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Tallha Akram
Tallha Akram on 11 Sep 2013
[X,map] = imread('trees.tif');
gmap = rgb2gray(map);
figure, imshow(X,map), figure, imshow(X,gmap);
figure; imshow(X,gmap); colormap(map);

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