Image processing circuit and method for processing image

Details Image processing circuit and method for processing image Image processing circuit and method for processing image

2005-11-15

2005-11-15

Kostak, Victor R. (Department: 2614)

Television

Image signal processing circuitry specific to television

Combined noise reduction and transition sharpening

C348S625000, C382S266000

Reexamination Certificate

active

06965416

ABSTRACT:
The present invention relates to an image processing circuit and an image processing method, and is applied to, for example, a video camera, an electronic still camera and the like, for compressing the dynamic range at a high compression rate with evading the lowering of an impression concerning the contrast and the unnatural edge emphasis. The present invention smoothes an input image X while preserving the edge to obtain a gain correction coefficient, and corrects the pixel value x(i, j) of the input image X with the gain correction coefficient.

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patent: 5442462 (1995-08-01), Guissin
patent: 5493622 (1996-02-01), Tsuchino et al.
patent: 5835618 (1998-11-01), Fang et al.
patent: 6055340 (2000-04-01), Nagao
patent: 6373992 (2002-04-01), Nagao

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