Television – Image signal processing circuitry specific to television – Special effects
Patent
1994-10-06
1996-01-30
Groody, James J.
Television
Image signal processing circuitry specific to television
Special effects
348575, H04N 5262
Patent
active
054884284
ABSTRACT:
In apparatus for generating a video special effect of making an image to see as if it were illuminated with light and changing the qualitative appearance of the image, an input video signal is stored in a video memory and read out by a reading address generated by a reading address generator. A video signal differentiating circuit differentiates the video signal read out from the video memory to obtain a dislocation quantity. An address dislocating circuits dislocates the reading address by using the dislocation quantity to produce a dislocation address. A region extracting circuit generates a region signal showing a positional relation of a pixel specified by the dislocation address and a predetermined specific region on the basis of the dislocation address. A luminance calculating circuit calculates a luminance correction value on the basis of the region signal. A video synthesizing circuit synthesizes the luminance correction value and the video signal read out from the video memory to obtain an output video signal.
REFERENCES:
patent: 4862391 (1989-08-01), Ohhashi
patent: 5255353 (1993-10-01), Itoh
Akashi Tomoko
Suzuki Norio
Burgess Glenton B.
Groody James J.
Matsushita Electric - Industrial Co., Ltd.
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