Method and apparatus for measuring noise using a plurality of no

Details Method and apparatus for measuring noise using a plurality of no Method and apparatus for measuring noise using a plurality of no

1995-02-24

1997-08-12

Boudreau, Leo

Image analysis

Image enhancement or restoration

Artifact removal or suppression

382260, 382271, 382273, 382272, 348607, G06K 940, G06K 938

Patent

active

056574010

ABSTRACT:
In a method of measuring noise in image signals, a number of noise estimates (SAD) is calculated (1). Subsequently, it is determined (3-9) which noise estimation interval [A, B] out of a plurality of predetermined noise estimation intervals [A, B] contains at least a predetermined number of noise estimates (SAD) and has at the same time the lowest upper interval boundary. The output noise measurement value depends on the determined noise estimation interval.

REFERENCES:
patent: 4908875 (1990-03-01), Assael et al.
patent: 5086485 (1992-02-01), Lin
patent: 5245677 (1993-09-01), Lepore et al.
patent: 5440344 (1995-08-01), Asamura et al.
"Video Noise Reduction", by J.O. Drewery, R. Storey and N.E. Tanton, BBC RD 1984/7, Section 7.3.

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