Contour correcting circuit and contour correcting method

Details Contour correcting circuit and contour correcting method Contour correcting circuit and contour correcting method

2005-06-21

2005-06-21

Couso, Yon J. (Department: 2625)

Image analysis

Image enhancement or restoration

Edge or contour enhancement

C382S269000, C382S274000, C382S275000, C358S003260, C358S003270, C358S463000

Reexamination Certificate

active

06909813

ABSTRACT:
In a contour correcting circuit that generates, on the basis of respective signals for a plurality of pixels including the pixel to be corrected at the center and arranged in a particular direction, a contour correction signal for the pixel to be corrected, there are provided contour component production means for producing a contour component for the pixel to be corrected depending on the gradient of the change among the respective signals for the plurality of pixels arranged in the particular direction; gain calculation means for calculating, on the basis of the level difference between the signal for the pixel to be corrected and the signal for the pixel adjacent in the particular direction to the pixel to be corrected, such a gain for correction that the larger the level difference is, the smaller the gain becomes; multiplication means for multiplying the contour component produced by the contour component production means by the gain for correction calculated by the gain calculation means; and addition means for adding the results of the multiplication by the multiplication means to the signal for the pixel to be corrected, to generate the contour correction signal for the pixel to be corrected.

REFERENCES:
patent: 4633296 (1986-12-01), Cham et al.
patent: 5471535 (1995-11-01), Ikezawa et al.
patent: 5937101 (1999-08-01), Jeon et al.
patent: 6285798 (2001-09-01), Lee
patent: 6453076 (2002-09-01), Nakajima

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