MATLAB: Put color to a gray image

gray to color

Hi,

I need help to make this, I have a gray image and I need to put 3 diferent colors in it, something like this.

Thank you.

gray_as_RGB = repmat(YourGrayImage, [1 1 3]);

now gray_as_RGB is the RGB equivalent of the grayscale image and you can write color information into it.

colormap(hot)

Thank you, I found the Solution:

R2D = mat2gray(R2D);
[R2D8,map] = gray2ind(R2D,128); 
pic = ind2gray(R2D8,map);
pic = mat2gray(pic);
imshow(pic);