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Perceptual denoising of color images

✍ Scribed by Ilka A. Netravali; Robert J. Holt; Charles Webb

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
597 KB
Volume
20
Category
Article
ISSN
0899-9457

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✦ Synopsis

Abstract

Denoising of color images is a trade‐off between sharpness of an image and perceived noise. We formulate a novel optimization problem that can maximize sharpness of an image while limiting the perceived noise under a model of visibility of additive random noise. We derive a closed‐form expression for an optimal two‐dimensional finite impulse response filter, show its uniqueness and existence, and present simulation results for black and white as well as color images. Simulation results show remarkable reduction in perceptibility of noise, while preserving sharpness. The computational burden required for the optimal filter is reduced by a new adhoc filter which is simple but has near optimal performance. Β© 2010 Wiley Periodicals, Inc. Int J Imaging Syst Technol, 20, 215–222, 2010.

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