Motivation
I want to implement visual testing with Selenium.
There is already a library romankh3/image-comparison
but it says "with the same sizes" so probably not suitable in some cases.
Simple Note
Test file ImageDiff.java
Diff implementation ImageDiffImpl.java
Assume expected image aa.png and actual image cc.png
the diff result will be output_image.png
References
How do you clone a BufferedImage
calculating distance between a point and a rectangular box
Filling a Multidimensional Array using a Stream
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