If you work in video, you may be familiar with Red Giant Primatte Keyer. Red Giant’s Primatte and Digital Anarchy Primatte Chromakey both use Primatte chromakey technology, developed by Imagica Corporation in 1982. [Wikipedia] The last update for Primatte Chromakey for Photoshop was January 2012, but it does work in current versions of Photoshop.
Keying and Background Removal in Photoshop, Part 2: Primatte Chromakey (Article/Tutorial)
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