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Anamorphic projection
From Wikipedia, the free encyclopedia
Anamorphic projection is a modification of the aspect ratio of an image by optical distortion which stretches or compresses the image in one dimension but not the other.
- Main article: Anamorphic widescreen.
Anamorphic projection in widescreen cinema uses special anamorphic lenses which compress the image during filming to fit the aspect ratio of 35 mm film. An equal but opposite anamorphic lens on the cinema projector stretches the image back to the full widescreen format. Similar techniques can be used to improve the quality of widescreen video projection in a home theater.
Some widescreen video monitors and DVD players are capable of stretching an image to match the format of the screen.
Similar forms of optical distortion have been used for abstract or artistic purposes. Where image elements are intended to appear in their stretched or compressed form in the final picture, this use of technique is referred to as anamorphic art. The most famous example being an anamorphic skull in "The Ambassadors". by Hans Holbein
In virtual reality, anamorphic projection techniques have also been used but calculations to transform the image are done by computer.