Video noise reduction system

Details Video noise reduction system Video noise reduction system

1989-04-28

1991-01-22

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358167, H04N 5213, H04N 964

Patent

active

049874810

ABSTRACT:
Circuitry for selectively reducing noise which results from film granularity, circuitry imperfections and other sources of random signal degradation by averaging, non-recursively, between 2 and 9 frames of digitized video information. By such averaging, since the noise is random, it is filtered out leaving only the desired picture. The averaging is performed only on areas of the picture which are close in both amplitude and color in adjacent frames. In this connection, in cases where there is no motion or scene change between adjacent frames, the entire picture corresponding to such frames can be processed according to the present invention.

REFERENCES:
patent: 3875584 (1975-04-01), Fletcher et al.
patent: 4107736 (1978-08-01), Lowry et al.
patent: 4163249 (1979-07-01), Michael et al.
patent: 4220965 (1980-09-01), Heitmann et al.
patent: 4539594 (1985-09-01), Illetschko
patent: 4573070 (1986-02-01), Cooper
patent: 4635120 (1987-01-01), Ichinoi

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