Effective color distortion and noise reduction for unsharp masking in LCD

Author

Lee, Kwang-Wook ; Kim, You-Sun ; Park, Sang-Hee ; Suryanto ; Ko, Sung-Jea

Author_Institution

Dept. of Electron. Eng., Korea Univ., Seoul

Volume

54

Issue

3

fYear

2008

fDate

8/1/2008 12:00:00 AM

Firstpage

1473

Lastpage

1477

Abstract

Unsharp masking is a popular image enhancement technique used to sharpen the image appearance in gray images. When applied to the color image, unsharp masking tends to introduce color distortion. In this paper, we propose a novel unsharp masking technique which can sharpen the image appearance without distorting the color and amplifying the noise. The proposed algorithm exploits the characteristics of the human visual system to control the level of sharpening and uses the energy dispersion filter to remove the color distortion. Experimental results show that our proposed algorithm successfully produces sharpened images that are free of noise and color distortion commonly found in conventional unsharp masking algorithm.

Keywords

colour displays; image colour analysis; image enhancement; liquid crystal displays; LCD; color distortion; energy dispersion filter; human visual system; image enhancement; noise reduction; unsharp masking; Adaptive filters; Color; Colored noise; Control systems; Humans; Image enhancement; Liquid crystal displays; Noise reduction; Nonlinear distortion; Visual system; Adaptive unsharp masking, energy dispersion, color distortion, liquid crystal displays, human visual system;

fLanguage

English

Journal_Title

Consumer Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0098-3063

Type

jour

DOI

10.1109/TCE.2008.4637643

Filename

4637643