Image signal processing method and apparatus

Details Image signal processing method and apparatus Image signal processing method and apparatus

1992-11-25

1995-07-11

Mancuso, Joseph

Image analysis

Image enhancement or restoration

Intensity, brightness, contrast, or shading correction

348607, 358518, 382167, G06K 940

Patent

active

054328691

ABSTRACT:
An improved image signal processing method and apparatus which can reduce the color noises of high level with a simple construction without deterioration of the apparent resolution of the color signal, and wherein the color noise components in the horizontal direction is diffused in the vertical direction, in a region where the change in the brilliance distribution is less, by the detection of the correlation in the vertical direction of the brilliance. The smoothing processing with respect to the color signal is prohibited with respect to the abrupt edge portion so as to preserve the edge portion of the color, with an superior effect that the S/N improvement of the high level can be effected without deterioration of the color resolution in the vertical direction of the image.

REFERENCES:
patent: 4468704 (1984-08-01), Stoffel et al.
patent: 4590609 (1986-05-01), Chevalet et al.
patent: 4630307 (1986-12-01), Cok
patent: 4845547 (1989-07-01), Naimpally
patent: 5235434 (1993-08-01), Wober

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