Automated snapshot/screenshot comparison tests

I recently found a snapshot/screenshot test comparison here:

It might have been generated by a custom screenshot testing tool, the results look similar to the ones seen in 2014 here:

Now I’d like to ask if anyone knows how these screenshot comparisons have been created and if the tool that was used is available for use somehow.

Thanks for any answers!

Hey leschirmeur any update on this?

Unfortunately no, haven’t come up yet with a screenshot comparison tool