The process goes by many names: color keying, bluescreening, greenscreening, pulling a matte, color differencing-even chroma keying, a term that really belongs to analog color television, a medium defined by chroma and heavily populated with weather forecasters. (Several contenders are in some form of development.) As of 2007, the tools to do color keying are more powerful than ever, but the overall process still remains full of pitfalls-which likely won't be overcome until some other means evolves to define precise areas of transparency in foreground footage.
and Adobe Press.Ĭolor keying was first devised in the 1950s as a clever means to combine live-action foreground footage and backgrounds that could come from virtually anywhere.
Used with permission of Pearson Education, Inc.
This article is adapted from Adobe After Effects CS3 Professional Studio Techniques by Mark Christiansen.
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