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Lesson 10. Keying

Lesson 10. Keying

Lesson FilesAPTS_Shake > essons > Lesson10
Mediabg.1-58.iff
 gs.1-58.iff
 gs_comp.1-58.iff
 reflection.1-58.iff
TimeThis lesson takes approximately 1 hour to complete.
GoalsDemonstrate the basic theory of the Primatte chroma-keying system
 Use Primatte to generate keys
 Process large image files faster with a DOD (Domain of Definition)


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 colored background, such as a blue or green screen. Shake includes the Primatte and Keylight keyers, with the Ultimatte keyer available as an optional plug-in.


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