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In page Animation:

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Rotoscoping is a technique patented by Max Fleischer in 1917 where animators trace live-action movement, frame by frame.[1] The source film can be directly copied from actors' outlines into animated drawings,[2] as in The Lord of the Rings (US, 1978), or used in a stylized and expressive manner, as in Waking Life (US, 2001) and A Scanner Darkly (US, 2006). Some other examples are Fire and Ice (US, 1983), Heavy Metal (1981), and Aku no Hana (Japan, 2013).[citation needed]