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Rotoscoping is an animation technique used by animators to trace over motion picture footage, frame by frame, when realistic action is required. Originally, photographed live-action movie images were projected onto a glass panel and re-drawn by an animator. This projection equipment is referred to as a Rotoscope. Although this device was eventually replaced by computers, the process is still referred to as Rotoscoping. In the visual effects industry, the term Rotoscoping refers to the technique of manually creating a matte for an element on a live-action plate so it may be composited over another background.
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Technique
Rotoscoping (often abbreviated as "roto") has often been used as a tool for visual effects in live-action movies. By tracing an object, the moviemaker creates a silhouette (called a matte) that can be used to extract that object from a scene for use on a different background. While blue and green screen techniques have made the process of layering subjects in scenes easier, rotoscoping still plays a large role in the production of visual effects imagery. Rotoscoping in the digital domain is often aided by motion tracking and onion-skinning software. Rotoscoping is often used in the preparation of garbage mattes for other matte-pulling processes.
Rotoscoping has also been used to allow a special visual effect (such as a glow, for example) to be guided by the matte or rotoscoped line. One classic use of traditional rotoscoping was in the original three Star Wars movies, where it was used to create the glowing lightsaber effect, by creating a matte based on sticks held by the actors. To achieve this, effects technicians traced a line over each frame with the prop, then enlarged each line and added the glow.
Rotoscoping After Effects Video
History
Early works and Fleischer's exclusivity
The Rotoscope technique was invented by Max Fleischer in 1915, and used in his groundbreaking Out of the Inkwell animated series (1918-1927) known simply as "Fleischer Process" on the early screen credits, and was essentially exclusive to Fleischer for several years. The live-movie reference for the character, later known as Koko the Clown, was performed by his brother (Dave Fleischer) dressed in a clown costume.
Originally conceived as a "short-cut" to animating, the Rotoscope process proved to be time consuming due the precise and laborious nature required in tracing. Rotoscoping is achieved by two methods, rear projection and front surface projection. In either case, the results can have slight deviations from the true line due to the separation of the projected image and the surface used for tracing. Misinterpretations of the forms cause the line to wiggle, and the Roto Tracings must be reworked over an animation disc, using the tracings as a guide where consistency and solidity are important.
Fleischer ceased depending on the Rotoscope for fluid action by 1924 when Dick Huemer became the Animation Director and brought his animation experience gained from his years on the Mutt and Jeff series. Fleischer returned to Rotoscoping in the 1930s for referencing intricate dance movements in his Popeye and Betty Boop cartoons. The most notable of these are the dance routines originating from Jazz Performer, Cab Calloway in Minnie the Moocher (1932), Snow White (1933), and The Old Man of the Mountain (1933). In these examples, the Roto tracing were used as a guide for timing and positioning while the cartoon characters of different proportions were drawn to conform to those positions.
Fleischer's last application of Rotoscope was for the realistic human animation required for the lead character in Gulliver's Travels (1939) and the human characters in Fleischer's last feature, Mr. Bug Goes to Town (1941). Most importantly, Fleischer's most effective use of Rotoscoping was in the action-oriented, film noir Superman series of the early 1940s, where realistic movement was achieved on a level unmatched by conventional cartoon animation.
Contemporary uses of the Rotoscope and its inherent challenges have been used to create surreal effects in music videos starting with "Routine Day" such as "Take On Me", followed by the Kansas video "All I Wanted", and animated TV series Delta State.
Uses by other studios
By 1934, Fleischer's patent expired, and other producers could use Rotoscoping freely. Walt Disney and his animators used the technique in Snow White and the Seven Dwarfs during 1937.
Leon Schlesinger Productions, which produced the Looney Tunes and Merrie Melodies cartoons for Warner Bros., occasionally used Rotoscoping. The 1939 MGM cartoon "Petunia Natural Park" from the The Captain and the Kids featured a Rotoscope version of Jackie.
Rotoscoping was used extensively in China's first animated feature movie, Princess Iron Fan (1941), which was released under very difficult conditions during the Second Sino-Japanese War and World War II. The technique was used extensively in the Soviet Union from the late-1930s to the 1950s, where it was known as "Éclair" (in Russian - ?????) and its historical use was enforced as a realization of Socialist Realism. Most of the movies produced with it were adaptations of folk tales or poems--for example, The Night Before Christmas or The Tale of the Fisherman and the Fish. Only during the early 1960s, after the "Khrushchev Thaw", did animators start to explore very different aesthetics.
The makers of The Beatles' Yellow Submarine used Rotoscoping in the "Lucy in the Sky with Diamonds" sequence. Director Martin Scorsese used Rotoscoping to remove a large chunk of cocaine hanging from Neil Young's left nostril in his rock documentary The Last Waltz.
Ralph Bakshi used Rotoscoping extensively for his animated features Wizards (1977), The Lord of the Rings (1978), American Pop (1981), and Fire and Ice (1983). Bakshi first used Rotoscoping because 20th Century Fox refused his request for a $50,000 budget increase to finish Wizards; he resorted to the rotoscope technique to finish the battle sequences.
Rotoscoping was also used in Heavy Metal (1981), What Have We Learned, Charlie Brown? (1983) and It's Flashbeagle, Charlie Brown (1984); three of a-ha's music videos, "Take On Me" (1985), "The Sun Always Shines on T.V." (1985), and "Train of Thought" (1986); Don Bluth's The Secret of NIMH (1982), An American Tail (1986), Harry and the Hendersons (closing credits), Titan A.E. (2000); and Nina Paley's Sita Sings the Blues (2008).
During 1994, Smoking Car Productions invented a digital Rotoscoping process to develop its critically acclaimed adventure video game The Last Express. The process was awarded U.S. Patent 6,061,462, Digital Cartoon and Animation Process. The game was designed by Jordan Mechner, who had used Rotoscoping extensively in his previous games Karateka and Prince of Persia.
During the mid-1990s, Bob Sabiston, an animator and computer scientist veteran of the Massachusetts Institute of Technology (MIT) Media Lab, developed a computer-assisted "interpolated Rotoscoping" process, which he used to make his award-winning short movie "Snack and Drink". Director Richard Linklater subsequently employed Sabiston and his proprietary Rotoshop software in the full-length feature movies Waking Life (2001) and A Scanner Darkly (2006). Linklater licensed the same proprietary rotoscoping process for the look of both movies. Linklater was the first director to use digital rotoscoping to create an entire feature movie. Additionally, a 2005-08 advertising campaign by Charles Schwab used Sabiston's Rotoscoping work for a series of television commercials, with the tagline "Talk to Chuck". The Simpsons used rotoscope as a couch gag in an episode about Bart Simpson's life.
During 2013, the anime The Flowers of Evil used Rotoscoping to produce a look that differed greatly from its manga source material. Viewers criticized the show's shortcuts in facial animation, its reuse of backgrounds, and the liberties it took with realism. Despite this, critics lauded the movie, and the website Anime News Network awarded it a perfect score for initial reactions.
In early 2015, an anime film titled The Case of Hana & Alice (animated prequel to the 2004 live-action film, Hana and Alice) was entirely animated through the use of Rotoscoping, but it was far better-received than The Flowers of Evil, with critics praising its Rotoscoping. In 2015, Kowabon, a short-form horror anime series using rotoscoping, was aired on Japanese TV.
Source of the article : Wikipedia
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