Television – Image signal processing circuitry specific to television – Special effects
Patent
1994-12-09
1996-03-19
Groody, James J.
Television
Image signal processing circuitry specific to television
Special effects
348586, 348587, H04N 5275
Patent
active
055006841
ABSTRACT:
A foreground live-video image, made up of a "blue back" part, a "hand/arm" part, and a "shadow" part of the "hand/arm" part, is chroma-key composited with a background live-video image. The "blue back" part is displayed to be transparent on the display screen. The "hand/arm" part is displayed to be opaque. The "shadow" part is displayed to be translucent. Whereas a first comparator determines a key color of the "blue back" part, a second comparator determines a key color of the "shadow" part. According to the output code of the first and second comparators, a data selector selects, pixel data of the background live-video image (Va) for the "blue back" part, pixel data of the foreground live-video image (Vb) for the "hand/arm" part, and pixel data found by multiplying each of the pixel data of Va and the pixel data of Vb by a respective weight and summing those products, as respective output pixel data. The "hand/arm" part may be displayed to be translucent by changing the output code relating to the "hand/arm" part by a code converter.
REFERENCES:
U.S. Ser. No. 08,091,250 dated Jul. 14, 1993 to Masaru Uya et al.
Groody James J.
Hsia Sherrie
Matsushita Electric - Industrial Co., Ltd.
LandOfFree
Chroma-key live-video compositing circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Chroma-key live-video compositing circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chroma-key live-video compositing circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1961426