rotoscope

noun

a projection device that allows images from live-action films to be traced to create an animated sequence

verb

(tr) to create (the outline of an object) for manipulation in an animated film sequence

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012