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Compositing Visual Effects, 2nd Edition by Steve Wright

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Rotoscoping is the process of drawing a matte frame by frame over live action footage. Starting around the year 50 B.C. (Before Computers) the technique back then was to rear project a frame of film onto a sheet of frosted glass, and then trace around the target object. The process got its name from the machine used to do the work, called a rotoscope. Things have improved somewhat since then, and today we use computers to draw shapes using the splines we saw in Chapter 5. The difference between drawing a single shape and rotoscoping is the addition of animation. Rotoscoping entails drawing a series of shapes that follow the target object through ...

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