Method for generating non-visible window edges in image composit

Details Method for generating non-visible window edges in image composit Method for generating non-visible window edges in image composit

1996-06-07

1998-04-21

Hsia, Sherrie

Television

Image signal processing circuitry specific to television

Special effects

348587, 348592, 348596, 348597, H04N 975

Patent

active

057423547

ABSTRACT:
The invention is a method used with a system for compositing a foreground scene including a subject before a nonuniformly illuminated colored backing, and a background scene, and where the nonuniformity is nonlinear from side to side and/or nonlinear from top to bottom. A window is employed to mask unwanted areas outside of, or on, the colored backing and one or more window edges form a visible join line where the window edges join the backing. The visible join line is made nonvisible without affecting the subject by a horizontal and vertical linear interpolation method for obtaining backing corrections that cause the backing level control signal to be uniform at the window edges and match an assigned window signal level.

REFERENCES:
patent: 4100569 (1978-07-01), Vlahos
patent: 4625231 (1986-11-01), Vlahos
patent: 5032901 (1991-07-01), Vlahos
patent: 5343252 (1994-08-01), Dadourian
patent: 5424781 (1995-06-01), Vlahos
patent: 5515109 (1996-05-01), Vlahos
patent: 5557339 (1996-09-01), Dadourian

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