Television – Image signal processing circuitry specific to television – Special effects
Patent
1995-04-05
1996-05-07
Metjahic, Safet
Television
Image signal processing circuitry specific to television
Special effects
348586, H04N 975, H04N 5272
Patent
active
055151094
ABSTRACT:
A method and apparatus used in the field of image compositing which eliminates the need to obtain an original clear frame of the backing during production, by synthesizing during post production a clear frame of the backing from a frame of the foreground scene that includes the subject as well as the backing. This synthetic clear frame eliminates the problems of obtaining a registered clear frame during production, and thereby permits the ready application of nonuniformity correction to image compositing in both motion pictures and graphic arts. The invention is also directed to a method and apparatus used in the field of image compositing which reduces the processing time for developing the inhibit signal that prevents the corrections from being applied to the subject, the control signal E.sub.c, and a number of other functions that are computed from the colored backing. It is possible to generate only that portion of a clear-frame needed to apply screen correction, and thereby save a major portion of the time needed to process and composite the image.
REFERENCES:
patent: 4344085 (1982-08-01), Vlahos
patent: 4625231 (1986-11-01), Vlahos
patent: 5032901 (1991-07-01), Vlahos
patent: 5146315 (1992-09-01), Muler
patent: 5301016 (1994-04-01), Gehrmann
patent: 5343252 (1994-08-01), Dadourian
patent: 5400081 (1995-03-01), Chaplin
Vlahos Paul
Vlahos Petro
Metjahic Safet
Ultimatte Corporation
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