Algorithm for approximating sihlouette image as polygon

Posted by jack on Game Development See other posts from Game Development or by jack
Published on 2012-10-23T01:49:56Z Indexed on 2012/10/23 5:28 UTC
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algorithm

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textures

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polygon

I want to be able to analyze a texture in real time and approximate a polygon to represent a silhouette. Imagine a person standing in front of a green screen and I want to approximately trace around their outline and get a 2D polygon as the result. Are there algorithms to do this and are they fast enough to work frame-to-frame in a game?

(I have found algorithms to triangulate polygons, but I am having trouble knowing what to search for that describes my goal.)

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