The following code might help you:
A = [1 1 1;1 0 1; 1 1 0]
%Create an image matrix same as size(A) with 3 RGB channels
img = zeros([size(A) 3])
%Channel one corresponds to red
img(:,:,1) = ~A;
%Channel 2 corresponds to green
img(:,:,2) = A;
img
imshow(img)
Refer to CData - Image color data argument in Color and Transparency of Image Properties for more information.
For an color image(RGB) matrix img, img(:,:,1) corresponds to channel R ie., red pixels, img(:,:,2) corresponds to channel G i.e., green pixels & img(:,:,3) corresponds to channel B ie., blue pixels.
img(i,j,:) corresponds to (i,j)'th pixel and the image color would be
- Red if it's value is [1 0 0]
- Green if it's value is [0 1 0]
- Blue if it's value is [0 0 1]
~A flips the binary values in the matrix i.e., the if the value of A(i,j) is 1 then the output of ~A(i,j) would be 0 & if the value of A(i,j) is 0 then the output of ~A(i,j) would be 1.
The RGB triplet of color yellow is [255 255 0] (in uint8) or [1 1 0] (0-1 normalized). So if you want an (i,j)'th pixel to be yellow color then change the value of img(i,j,:) to [1 1 0]
img(i,j,:) = [1 1 0]
