Special effects using polar image coordinates
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United States of America Patent
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Sep 24, 1991
Grant Date -
N/A
app pub date -
Jan 11, 1990
filing date -
Jan 11, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Special effects using polar image coordinates produce a new class of television special effects, such as spherical mapping and kaleidoscope effects. Rectangular coordinates for an input image are converted into polar coordinates, and the polar coordinates are mathematically manipulated according to the desired special effect. The modified polar coordinates may be applied directly to the rectangular coordinates to produce modified rectangular coordinates that represent the desired special effect, or they may be converted back into rectangular coordinates as the modified rectangular coordinates.
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