Visual_Diff

• dpxdt is actively maintained, deploys to app engine.
• ImageMagick is used to compare the images
• http://www.idreamofuni.com/2015/05/how-shift-is-using-depicted.html

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• wraith uses ImageMagick compare
• not easy to setup & deploy, not well maintained (many bugs)

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• wraith-selenium is abandonwar

• needle based on 2009 abandonware pdiff project.

• huxley is officially abandonware and used a simple python PIL based algorithm for comparison