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Proceedings Paper

Color image sharpening based on collective time-evolution of simultaneous nonlinear reaction-diffusion
Author(s): Takahiro Saito; Jun Satsumabayashi; Hiroyuki Harada; Takashi Komatsu
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Paper Abstract

Previously we have presented a method for selective sharpness enhancement of monochrome images. Our method is based on the simultaneous nonlinear reaction-diffusion time-evolution equipped with a nonlinear diffusion term, a reaction term and an overshooting term, and it can sharpen only degraded edges blurred by several causes without increasing the visibility of nuisance factors such as random noise. This paper extends our method to selective sharpening of color images. As to the how to extend it, we take into accounts some variations about the treatment of three color components and the selection of the color space. By experiments, we quantitatively evaluate performance of these variations. Among them, the collective treatment of color components based on the simultaneous full-nonlinear reaction-diffusion time-evolution achieves the best performance, and sharpens blurred color edges selectively much better than the existing sharpness enhancement methods such as the adaptive peaking method.

Paper Details

Date Published: 23 June 2003
PDF: 12 pages
Proc. SPIE 5150, Visual Communications and Image Processing 2003, (23 June 2003); doi: 10.1117/12.501482
Show Author Affiliations
Takahiro Saito, Kanagawa Univ. (Japan)
Jun Satsumabayashi, Kanagawa Univ. (Japan)
Hiroyuki Harada, Kanagawa Univ. (Japan)
Takashi Komatsu, Kanagawa Univ. (Japan)

Published in SPIE Proceedings Vol. 5150:
Visual Communications and Image Processing 2003
Touradj Ebrahimi; Thomas Sikora, Editor(s)

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