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differece image of 2 images

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How to calculate difference image of 2 images read from different folders?

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Rik
Rik on 28 Aug 2019
If they are the same size you can just subtract one from the other. What have you tried so far?
Bjorn Gustavsson
Bjorn Gustavsson on 28 Aug 2019
And just to be clear, subtraction between data of for example uint8 might give you unwanted results, cast the images to doubles before subtracting:
diff_img1 = img1 - img2;
diff_img2 = double(img1) - double(img2);
% compare the two as you see fit

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Accepted Answer

Subhadeep Koley
Subhadeep Koley on 3 Sep 2019
Edited: Subhadeep Koley on 3 Sep 2019
MATLAB provides imabsdiff function to find the absolute difference of two images. The following code might help you.
% read image from folder 1
image1=imread('yourImage1.png');
% read image from folder 2
image2=imread('yourImage2.png');
% calculate the absolute difference
absDiffImage=imabsdiff(image1,image2);
% plot the absolute difference image
figure;
imshow(absDiffImage,[]);
colormap(jet);
colorbar;

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