Sign coring for contour reduction

Details Sign coring for contour reduction Sign coring for contour reduction

2011-07-19

2011-07-19

Cunningham, Gregory F (Department: 2624)

Image analysis

Image enhancement or restoration

Image filter

C382S221000

Reexamination Certificate

active

07983504

ABSTRACT:
A method for contour reduction in a digital picture is disclosed. The method generally includes the steps of (A) buffering a plurality of luma samples in a current line of the digital picture, each of the luma samples having a respective input value, (B) calculating a plurality of horizontal sum-of-signs along the current line, wherein each of the horizontal sum-of-signs comprises a sum of a plurality of amplitude differences between pairs the luma samples from the current line and (C) generating a plurality of output value based on the horizontal sum-of-signs, one of the output values for each one of the luma samples.

REFERENCES:
patent: 5488430 (1996-01-01), Hong
patent: 5892551 (1999-04-01), Uematsu
patent: 6304605 (2001-10-01), Haikonen et al.
patent: 7002636 (2006-02-01), Ishikawa et al.
patent: 2002/0196373 (2002-12-01), Szybiak et al.
patent: 2006/0158531 (2006-07-01), Yanof

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