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Rotoscoping. Patent drawing for Max Fleischer 's original rotoscope. The artist is drawing on a transparent easel, onto which the movie projector at the right is beaming an image of a single movie frame. Rotoscoping is an animation technique that animators use to trace over motion picture footage, frame by frame, to produce realistic action.
Optical ray tracing describes a method for producing visual images constructed in 3-D computer graphics environments, with more photorealism than either ray casting or scanline rendering techniques. It works by tracing a path from an imaginary eye through each pixel in a virtual screen, and calculating the color of the object visible through it.
Main article: Early history of animation. Animated movies are part of ancient traditions in storytelling, visual arts and theatre. Popular techniques with moving images before film include shadow play, mechanical slides, and mobile projectors in magic lantern shows (especially phantasmagoria ). Techniques with fanciful three-dimensional moving ...
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Traditional animation (or classical animation, cel animation, or hand-drawn animation) is an animation technique in which each frame is drawn by hand. The technique was the dominant form of animation, until the final few years of the 20th century, when there was a shift to computer animation in the industry, specifically 3D computer animation.
Optical illusion is also used in film by the technique of forced perspective . Op art is a style of art that uses optical illusions to create an impression of movement, or hidden images and patterns. Trompe-l'œil uses realistic imagery to create the optical illusion that depicted objects exist in three dimensions.
The camera obscura was used to study eclipses without the risk of damaging the eyes by looking directly into the Sun. As a drawing aid, it allowed tracing the projected image to produce a highly accurate representation, and was especially appreciated as an easy way to achieve proper graphical perspective.
Vectorization can be used to update images or recover work. Personal computers often come with a simple paint program that produces a bitmap output file. These programs allow users to make simple illustrations by adding text, drawing outlines, and filling outlines with a specific color.