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 publicationProceedings - International Conference on Image Processing, ICIP
Pages2793-2796
Number of pages4
DOIs
Publication statusPublished - 2012 Dec 1
Event2012 19th IEEE International Conference on Image Processing, ICIP 2012 - Lake Buena Vista, FL, United States
Duration: 2012 Sep 302012 Oct 3

Other

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

Fingerprint

Liquid crystal displays
Display devices
Image quality
Luminance

Keywords

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

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Information Systems

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 Proceedings - International Conference on Image Processing, ICIP (pp. 2793-2796). [6467479] https://doi.org/10.1109/ICIP.2012.6467479

Power-constrained backlight scaling and contrast enhancement for TFT-LCD displays. / Lee, Chul; Kim, Jin Hwan; Lee, Chulwoo; Kim, Chang-Su.

Proceedings - International Conference on Image Processing, ICIP. 2012. p. 2793-2796 6467479.

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

Lee, C, Kim, JH, Lee, C & Kim, C-S 2012, Power-constrained backlight scaling and contrast enhancement for TFT-LCD displays. in Proceedings - International Conference on Image Processing, ICIP., 6467479, pp. 2793-2796, 2012 19th IEEE International Conference on Image Processing, ICIP 2012, Lake Buena Vista, FL, United States, 12/9/30. https://doi.org/10.1109/ICIP.2012.6467479
Lee C, Kim JH, Lee C, Kim C-S. Power-constrained backlight scaling and contrast enhancement for TFT-LCD displays. In Proceedings - International Conference on Image Processing, ICIP. 2012. p. 2793-2796. 6467479 https://doi.org/10.1109/ICIP.2012.6467479
Lee, Chul ; Kim, Jin Hwan ; Lee, Chulwoo ; Kim, Chang-Su. / Power-constrained backlight scaling and contrast enhancement for TFT-LCD displays. Proceedings - International Conference on Image Processing, ICIP. 2012. pp. 2793-2796
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