color difference based greenscreening for openframeworks
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Color difference keying for openframeworks

Based on the method described here

This addon uses opencv to calculate the color difference of a specific green tone. This has a major advantage over ofxChromaKey ( as this method is able to extract shadow information and produces a smoother result.
The drawback is however it will only work with a well lit greenscreen and is way less error resistant than chroma keying.

The result looks something like this (taken with a really crappy green background)