How to find differences in pictures?

Question

PHP

It is necessary to implement the division of two pictures into 4 parts, and compare these parts to show which part has differences?

What are the image comparison methods?

Answer 1

I did about the same with python3+openCV+scikit-image.
First, I converted images to bw, then calculated SSIM and found the contours of differences and marked them.
In your version, you can either read the SSIM of two images and then count the number of different contours in each of the 4 parts. Either count the SSIM of every fourth part.