Post-processing circuit for processing an image signal...

Details Post-processing circuit for processing an image signal... Post-processing circuit for processing an image signal...

2011-06-28

2011-06-28

Le, Brian Q (Department: 2624)

Image analysis

Image enhancement or restoration

Artifact removal or suppression

C382S254000, C382S263000, C382S264000, C348S596000, C348S618000

Reexamination Certificate

active

07970234

ABSTRACT:
A post-processing circuit for processing an image signal according to frequency components of an image signal includes: a low-frequency extracting unit outputting a low-frequency image component of the image signal as a low-frequency signal; a high-frequency extracting unit multiplying a high-frequency image component of the image signal by a first gain and outputting the multiplication product as a high-frequency signal; an intermediate-frequency extracting unit multiplying an intermediate-frequency image component of the image signal by a second gain and outputting the multiplication product as an intermediate-frequency signal; and an adder adding the low-frequency signal, the high-frequency signal, and the intermediate-frequency signal and outputting the addition sum as a post-processed signal, wherein the first gain and the second gain are differently set according to a pixel location in a spatial domain.

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patent: 1019980046822 (2000-06-01), None
patent: 1020020084712 (2002-11-01), None

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