Method and apparatus for correcting contour of color image signa

Details Method and apparatus for correcting contour of color image signa Method and apparatus for correcting contour of color image signa

1996-04-29

1998-03-24

Au, Amelia

Television

Image signal processing circuitry specific to television

Transition or edge sharpeners

348663, 348665, 348668, 348640, H04N 966, H04N 521, H04N 977, H04N 978

Patent

active

057318450

ABSTRACT:
A two-dimensional contour enhancement is performed along a plurality of lines on a two-dimensional frequency characteristic chart, the line intersecting with each other at middle points between successive color cross generating regions and not passing through an origin. Then, the contour enhancement can be carried out in a frequency region of 3-4 MHz in which a visual effect of contour enhancement appears most effective, while the enhancement in the cross color generating regions can be suppressed.

REFERENCES:
patent: 4677461 (1987-06-01), Mizutani et al.
patent: 5019895 (1991-05-01), Yamamoto et al.
patent: 5227869 (1993-07-01), Degawa
patent: 5285267 (1994-02-01), Lim
patent: 5291276 (1994-03-01), Matsumoto et al.
patent: 5517255 (1996-05-01), Gai et al.

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