Comparing images and creating image diffs in RubyBy Jeff Kreeftmeijer on 2011-04-18 (last updated on 2018-11-05) I’m sure you’ve seen the image view modes Github released last month. It’s a really nice way to see the differences between two versions of an image. In this article, I’ll try to explain how an image diff could be built using pure Ruby and ChunkyPNG. If you need a more basic introduction to working with pixel data in ChunkyPNG, check
