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How to change particular pixel color of a binary image to other color?

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Asif Hasan
Asif Hasan on 30 Oct 2014
Commented: Asif Hasan on 31 Oct 2014
Sir,
I have a binary image and i want to change the color of the black pixel to green. How do i do that ? Please help. Thanks in advance.
This is the binary image:

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Accepted Answer

Image Analyst
Image Analyst on 30 Oct 2014
Try this:
%grayImage = imread('cameraman.tif');
%binaryImage = grayImage > 128;
%subplot(1,2,1);
%imshow(binaryImage);
redAndBlueChannel = 255 * uint8(binaryImage);
greenChannel = 255 * ones(size(binaryImage), 'uint8'); % Green Everywhere.
rgbImage = cat(3, redAndBlueChannel, greenChannel, redAndBlueChannel);
%subplot(1,2,2);
%imshow(rgbImage);
Remove the % if you want to demo it using a standard MATLAB demo image.

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Image Analyst
Image Analyst on 30 Oct 2014
It works just fine. Here's proof:
s = load('binaryimage.mat')
binaryImage = s.show;
subplot(1,2,1);
imshow(binaryImage);
redAndBlueChannel = 255 * uint8(binaryImage);
greenChannel = 255 * ones(size(binaryImage), 'uint8'); % Green Everywhere.
rgbImage = cat(3, redAndBlueChannel, greenChannel, redAndBlueChannel);
subplot(1,2,2);
imshow(rgbImage);

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