Chromakey method for processing picture signals in which fading

Details Chromakey method for processing picture signals in which fading Chromakey method for processing picture signals in which fading

1993-08-25

1995-10-03

Kostak, Victor R.

Television

Image signal processing circuitry specific to television

Special effects

348592, 348597, H04J 975

Patent

active

054556333

ABSTRACT:
In a chroma-key method for inserting a background picture signal into key color-characterized key regions of a foreground picture signal, in which method fading operations are performed between the picture signals in proportional zones in dependence upon a control signal, while intermediate colors occurring in the proportional zones in the foreground signal are transformed into new intermediate colors which constitute a transition from the color of the foreground picture signal to that of the background signal, an optimal adaptation of the proportional zone to the respective color location of a foreground picture signal region is ensured in that individual proportional zones for regions of different color locations in the foreground picture signal are fixed in such a way that the distance between the color location of each region and the color location of the key color is determined individually for each region, and in that the control signal is generated for each region in dependence upon the color location distance determined for the respective region.

REFERENCES:
patent: 4533937 (1985-08-01), Yamamoto et al.
patent: 5194941 (1993-03-01), Grimaldie et al.
patent: 5301016 (1994-04-01), Gehrmann
patent: 5335174 (1994-10-01), Mishima

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