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Animation is the rapid display of a sequence of images of 2-D or 3-D artwork or model positions in order to create an illusion of movement. It is an optical illusion of motion due to the phenomenon of persistence of vision, and can be created and demonstrated in a number of ways. The most common method of presenting animation is as a motion picture or video program, although several other forms of presenting animation also exist.

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Techniques

Traditional animation

(Also called cel animation or hand-drawn animation) Traditional animation was the process used for most animated films of the 20th century. The individual frames of a traditionally animated film are photographs of drawings, which are first drawn on paper. To create the illusion of movement, each drawing differs slightly from the one before it. The animators' drawings are traced or photocopied onto transparent acetate sheets called cels, which are filled in with paints in assigned colors or tones on the side opposite the line drawings. The completed character cels are photographed one-by-one onto motion picture film against a painted background by a rostrum camera.

The traditional cel animation process became obsolete by the beginning of the 21st century. Today, animators' drawings and the backgrounds are either scanned into or drawn directly into a computer system. Various software programs are used to color the drawings and simulate camera movement and effects. The final animated piece is output to one of several delivery mediums, including traditional 35 mm film and newer media such as digital video. The "look" of traditional cel animation is still preserved, and the character animators' work has remained essentially the same over the past 70 years. Some animation producers have used the term "tradigital" to describe cel animation which makes extensive use of computer technology.

Examples of traditionally animated feature films include Pinocchio (United States, 1940), Animal Farm (United Kingdom, 1954), and Akira (Japan, 1988). Traditional animated films which were produced with the aid of computer technology include The Lion King (US, 1994) Sen to Chihiro no Kamikakushi (Spirited Away) (Japan, 2001), and Les Triplettes de Belleville (2003).

• Full animation refers to the process of producing high-quality traditionally animated films, which regularly use detailed drawings and plausible movement. Fully animated films can be done in a variety of styles, from realistically designed works such as those produced by the Walt Disney studio, to the more "cartoony" styles of those produced by the Warner Bros. animation studio. Many of the Disney animated features are examples of full animation, as are non-Disney works such as The Secret of NIMH (US, 1982) and The Iron Giant (US, 1999)
• Limited animation involves the use of less detailed and/or more stylized drawings and methods of movement. Pioneered by the artists at the American studio United Productions of America, limited animation can be used as a method of stylized artistic expression, as in Gerald McBoing Boing (US, 1951), Yellow Submarine (UK, 1968), and much of the anime produced in Japan. Its primary use, however, has been in producing cost-effective animated content for media such as television (the work of Hanna-Barbera, Filmation, and other TV animation studios) and later the Internet (web cartoons).
• Rotoscoping is a technique, patented by Max Fleischer in 1917, where animators trace live-action movement, frame by frame. The source film can be directly copied from actors' outlines into animated drawings, as in The Lord of the Rings (US, 1978), used as a basis and inspiration for character animation, as in most Disney films, or used in a stylized and expressive manner, as in Waking Life (US, 2001) and A Scanner Darkly (US, 2006).

Stop motion

Stop-motion animation is used to describe animation created by physically manipulating real-world objects and photographing them one frame of film at a time to create the illusion of movement. There are many different types of stop-motion animation, usually named after the type of media used to create the animation. Computer software is widely available to create this type of animation.

• Puppet animation typically involves stop-motion puppet figures interacting with each other in a constructed environment, in contrast to the real-world interaction in model animation. The puppets generally have an armature inside of them to keep them still and steady as well as constraining them to move at particular joints. Examples include The Tale of the Fox (France, 1937), the films of Jiří Trnka, Coraline (US, 2009), and the TV series Robot Chicken (US, 2005–present).
  • Puppetoon, created using techniques developed by George Pál, are puppet-animated films which typically use a different version of a puppet for different frames, rather than simply manipulating one existing puppet.
• Clay animation, or Plasticine animation often abbreviated as claymation, uses figures made of clay or a similar malleable material to create stop-motion animation. The figures may have an armature or wire frame inside of them, similar to the related puppet animation (below), that can be manipulated in order to pose the figures. Alternatively, the figures may be made entirely of clay, such as in the films of Bruce Bickford, where clay creatures morph into a variety of different shapes. Examples of clay-animated works include The Gumby Show (US, 1957–1967) Morph shorts (UK, 1977–2000), Wallace and Gromit shorts (UK, as of 1989), Jan Švankmajer's Dimensions of Dialogue (Czechoslovakia, 1982), The Amazing Mr. Bickford (US, 1987), The Trap Door (UK, 1984).
• Cutout animation is a type of stop-motion animation produced by moving 2-dimensional pieces of material such as paper or cloth. Examples include Terry Gilliam's animated sequences from Monty Python's Flying Circus (UK, 1969-1974); Fantastic Planet (France/Czechoslovakia, 1973) ; Tale of Tales (Russia, 1979), The pilot episode of the TV series (and sometimes in episodes) of South Park (US, 1997).
  • Silhouette animation is a variant of cutout animation in which the characters are backlit and only visible as silhouettes. Examples include The Adventures of Prince Achmed (Weimar Republic, 1926) and Princes et princesses (France, 2000).
• Graphic animation uses non-drawn flat visual graphic material (photographs, newspaper clippings, magazines, etc.) which are sometimes manipulated frame-by-frame to create movement. At other times, the graphics remain stationary, while the stop-motion camera is moved to create on-screen action.
• Model animation refers to stop-motion animation created to interact with and exist as a part of a live-action world. Intercutting, matte effects, and split screens are often employed to blend stop-motion characters or objects with live actors and settings. Examples include the work of Ray Harryhausen, as seen in films such Jason and the Argonauts (1961), and the work of Willis O'Brien on films such as King Kong (1933 film).
  • Go motion is a variant of model animation which uses various techniques to create motion blur between frames of film, which is not present in traditional stop-motion. The technique was invented by Industrial Light & Magic and Phil Tippett to create special effects scenes for the film The Empire Strikes Back (1980).
• Object animation refers to the use of regular inanimate objects in stop-motion animation, as opposed to specially created items. One example of object animation is the brickfilm, which incorporates the use of plastic toy construction blocks such as Lego.
• Pixilation involves the use of live humans as stop motion characters. This allows for a number of surreal effects, including disappearances and reappearances, allowing people to appear to slide across the ground, and other such effects. Examples of pixilation include Norman McLaren's Neighbours (Canada, 1952), and a portion of the music video for "Weird Al" Yankovic's song UHF

Computer animation

Computer animation encompasses a variety of techniques, the unifying factor being that the animation is created digitally on a computer.

2D animation

2D animation figures are created and/or edited on the computer using 2D bitmap graphics or created and edited using 2D vector graphics. This includes automated computerized versions of traditional animation techniques such as of tweening, morphing, onion skinning and interpolated rotoscoping.

Examples: Foster's Home for Imaginary Friends, SpongeBob SquarePants(certain sequences only), Danny Phantom, The Fairly OddParents, El Tigre: The Adventures of Manny Rivera

• Analog computer animation
• Flash animation
• PowerPoint animation

3D animation

3D animation digital models manipulated by an animator. In order to manipulate a mesh, it is given a digital skeletal structure that can be used to control the mesh. This process is called rigging. Various other techniques can be applied, such as mathematical functions (ex. gravity, particle simulations), simulated fur or hair, effects such as fire and water and the use of Motion capture to name but a few, these techniques fall under the category of 3d dynamics. Many 3D animations are very believable and are commonly used as Visual effects for recent movies.

Examples: Toy Story, Shrek, Pocoyo

Terms

• Cel-shaded animation
• Morph target animation
• Non-photorealistic rendering
• Skeletal animation
• Motion capture
• Crowd simulation

2D animation techniques tend to focus on image manipulation while 3D techniques usually build virtual worlds in which characters and objects move and interact. 3D animation can create images that seem real to the viewer.

Other animation techniques

• Drawn on film animation: a technique where footage is produced by creating the images directly on film stock, for example by Norman McLaren, Len Lye and Stan Brakhage.
• Paint-on-glass animation: a technique for making animated films by manipulating slow drying oil paints on sheets of glass.
• Pinscreen animation: makes use of a screen filled with movable pins, which can be moved in or out by pressing an object onto the screen. The screen is lit from the side so that the pins cast shadows. The technique has been used to create animated films with a range of textural effects difficult to achieve with traditional cel animation.
• Sand animation: sand is moved around on a backlighted or frontlighted piece of glass to create each frame for an animated film. This creates an interesting effect when animated because of the light contrast.
• Flip book: A flip book (sometimes, especially in British English, flick book) is a book with a series of pictures that vary gradually from one page to the next, so that when the pages are turned rapidly, the pictures appear to animate by simulating motion or some other change. Flip books are often illustrated books for children, but may also be geared towards adults and employ a series of photographs rather than drawings. Flip books are not always separate books, but may appear as an added feature in ordinary books or magazines, often in the page corners. Software packages and websites are also available that convert digital video files into custom-made flip books.

Other techniques and approaches

• Character animation
• Chuckimation
• Multi-sketching
• Special effects animation
• Animatronics
• Stop motion

See also

• 12 basic principles of animation
• Adult animation
• Animation software
• Anime
• Art
• Tradigital art
• Avar (animation variable)
• Computer generated imagery
• List of movie genres
• History of animation
• International Tournée of Animation
• List of animation studios
• List of animated feature-length films
• List of animated shorts available on DVD
• List of motion picture topics
• Motion graphic design
• Slideshow animation
• Stick figure
• Wire frame model
• Motion Capture
• Model sheet

References

This article includes a list of references, related reading, or external links, but its sources remain unclear because it lacks inline citations. Please help improve this article by introducing more precise citations. (February 2008) (Learn how and when to remove this message)

• Ball, R., Beck, J., DeMott R., Deneroff, H., Gerstein, D., Gladstone, F., Knott, T., Leal, A., Maestri, G., Mallory, M., Mayerson, M., McCracken, H., McGuire, D., Nagel, J., Pattern, F., Pointer, R., Webb, P., Robinson, C., Ryan, W., Scott, K., Snyder, A. & Webb, G. (2004) Animation Art: From Pencil to Pixel, the History of Cartoon, Anime & CGI. Fulhamm London.: Flame Tree Publishing. ISBN 1-84451-140-5
• Crafton, Donald (1982). Before Mickey. Cambridge, Massachusetts.: The MIT Press. ISBN 0-262-03083-7
• Solomon, Charles (1989). Enchanted Drawings: The History of Animation. New York.: Random House, Inc. ISBN 0-394-54684-9

Further reading

• Anderson, Joseph and Barbara, "The Myth of Persistence of Vision Revisited", Journal of Film and Video, Vol. 45, No. 1 (Spring 1993): 3-12
• Culhane, Shamus, Animation Script to Screen
• Laybourne, Kit, The Animation Book
• Ledoux, Trish, Ranney, Doug, & Patten, Fred (Ed.), Complete Anime Guide: Japanese Animation Film Directory and Resource Guide, Tiger Mountain Press 1997
• Lowe, Richard & Schnotz, Wolfgang (Eds) Learning with Animation. Research implications for design Cambridge University Press, 2008
• Masson, Terrence, CG101: A Computer Graphics Industry Reference Unique and personal histories of early computer animation production, plus a comprehensive foundation of the industry for all reading levels. ISBN 0-9778710-0-2
• Thomas, Frank and Johnston, Ollie, Disney Animation: The Illusion of Life, Abbeville 1981
• Walters, Faber and Helen (Ed.), Animation Unlimited: Innovative Short Films Since 1940, HarperCollins Publishers, 2004
• Williams, Richard, The Animator's Survival Kit ISBN 0-5712-0228-4
• Bob Godfrey and Anna Jackson, 'The Do-It-Yourself Film Animation Book' BBC Publications 1974 ISBN 0-563-10829-0 Now out of print but available s/hand through a range of sources such as Amazon Uk.

External links

• Template:Dmoz
• Animation: An Interdisciplinary Journal
• Experimental Animation Techniques
• Chronology of Animation
• How An Animated Cartoon is Made
• "Animando", a 12-minute film demonstrating 10 different animation techniques (and teaching how to use them).

• Animation
• Film and video technology
• Stop motion