How do I subtract two labeled images on matlab

I have two labeled images on Matlab(created using bwlabel function) and I want to subtract them such that if there is overlap of a region, the entire connected region is eliminated.

Answer 1

[Saurabh]

Hi @Gouthamrajan Nadarajan,

I would like to understand the various methods you have employed to subtract your labeled images and request access to the sample images you are currently using for your work.

To subtract two labeled images in MATLAB while eliminating overlapping regions, you can use the following approach.

This involves identifying the overlapping regions and then removing them from both images.

Here's a sample MATLAB code example:

% Sample labeled images
img1 = [1 1 0 2; 1 1 0 2; 0 0 0 0; 3 3 0 0];
img2 = [0 0 0 2; 0 0 0 2; 0 0 0 0; 3 3 0 0];
subplot(1,2,1), imshow(img1, []), title('Image 1');
subplot(1,2,2), imshow(img2, []), title('Image 2');

% Find overlapping regions
overlap = img1 & img2;

% Remove overlapping regions from both images
img1(overlap > 0) = 0;
img2(overlap > 0) = 0;

% Display results
figure;
subplot(1,2,1), imshow(img1, []), title('Image 1 after subtraction');
subplot(1,2,2), imshow(img2, []), title('Image 2 after subtraction');

This code creates two labeled images, identifies the overlapping regions, and sets those regions to zero in both images.

I hope this was helpful!