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Apple Pro Training Series: Shake 4 by Marco Paolini

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Chapter 10. Keying

Keying and generating mattes is one of the most important aspects of compositing. The process of keying involves extracting an object from an image and combining it with a different background. Most keyers use the difference in color between the color channels of an image to extract the matte. Normally, this technique depends on the foreground subject being photographed in front of a uniformly ...

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