System for producing a shadow of an object in a chroma key envir

Details System for producing a shadow of an object in a chroma key envir System for producing a shadow of an object in a chroma key envir

1996-07-30

1998-04-07

Hsia, Sherrie

Television

Image signal processing circuitry specific to television

Special effects

348592, H04N 975

Patent

active

057370311

ABSTRACT:
A video system is described which creates a virtual shadow of a foreground object filmed in front of a blue screen with a main video camera. The virtual shadow is created using a second video camera located as a virtual light source. Images from both cameras are processed by a chroma keyer to separate the foreground object. The video image from the second camera is processed to create the virtual shadow and both video images are combined with background image. Object location and actor prompting systems are described.

REFERENCES:
patent: 5400081 (1995-03-01), Chaplin
patent: 5459529 (1995-10-01), Searby
patent: 5500684 (1996-03-01), Uya

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