Enhancement of LCD Images Illuminated with Dim Backlight

Author

Huang, Tai-Hsiang ; Yeh, Su-Ling ; Chen, Homer H.

Author_Institution

Grad. Inst. of Commun. Eng., Nat. Taiwan Univ., Taipei, Taiwan

fYear

2011

fDate

July 31 2011-Aug. 4 2011

Firstpage

1

Lastpage

5

Abstract

Dimming the LCD backlight saves the battery power of a portable multimedia device but causes image quality degradation. In this paper, we propose an algorithm to overcome the effect of dim backlight on image quality. This algorithm enhances the backlight-scaled image by exploiting the human visual property. It performs a two-layer image decomposition based on the just noticeable difference theory and enhances the backlight-scaled image by luminance boosting and compression. Experimental results are provided to demonstrate the performance of the proposed algorithm.

Keywords

brightness; energy conservation; image coding; image enhancement; liquid crystal displays; multimedia systems; LCD backlight; LCD image enhancement; backlight-scaled image enhancement; battery power saving; dim backlight illumination; image compression; image quality degradation; just noticeable difference theory; liquid crystal display; luminance boosting; portable multimedia device; two-layer image decomposition; Brightness; Humans; Image coding; Image color analysis; Image quality; Performance evaluation; Psychology;

fLanguage

English

Publisher

ieee

Conference_Titel

Computer Communications and Networks (ICCCN), 2011 Proceedings of 20th International Conference on

Conference_Location

Maui, HI

ISSN

1095-2055

Print_ISBN

978-1-4577-0637-0

Type

conf

DOI

10.1109/ICCCN.2011.6006044

Filename

6006044