Power-constrained backlight scaling and contrast enhancement for TFT-LCD displays

Chul Lee, Jin Hwan Kim, Chulwoo Lee, Chang-Su Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)

Abstract

We propose a novel backlight-scaled contrast enhancement algorithm to maintain the image quality when the backlight of a TFT-LCD display is dimmed for power reduction. First, we derive the transformation function to maintain the perceived luminance and enhance the contrast. Second, we model the perceptual distortion, which describes the information loss due to the backlight scaling. Then, we propose a Lagrangian method to maximize the backlight-scaled image contrast subject to the constraint on the perceptual distortion. Simulation results show that the proposed algorithm provides better image qualities than the conventional algorithms.

Original languageEnglish
Title of host publication2012 IEEE International Conference on Image Processing, ICIP 2012 - Proceedings
Pages2793-2796
Number of pages4
DOIs
Publication statusPublished - 2012
Event2012 19th IEEE International Conference on Image Processing, ICIP 2012 - Lake Buena Vista, FL, United States
Duration: 2012 Sep 302012 Oct 3

Publication series

NameProceedings - International Conference on Image Processing, ICIP
ISSN (Print)1522-4880

Other

Other2012 19th IEEE International Conference on Image Processing, ICIP 2012
CountryUnited States
CityLake Buena Vista, FL
Period12/9/3012/10/3

Keywords

  • Backlight scaling
  • TFT-LCD
  • contrast enhancement
  • power management

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Information Systems

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  • Cite this

    Lee, C., Kim, J. H., Lee, C., & Kim, C-S. (2012). Power-constrained backlight scaling and contrast enhancement for TFT-LCD displays. In 2012 IEEE International Conference on Image Processing, ICIP 2012 - Proceedings (pp. 2793-2796). [6467479] (Proceedings - International Conference on Image Processing, ICIP). https://doi.org/10.1109/ICIP.2012.6467479