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research-article

Image enhancement for backlight-scaled TFT-LCD displays

Published: 01 April 2009 Publication History

Abstract

One common way to extend the battery life of a portable device is to reduce the LCD backlight intensity. In contrast to previous approaches that minimize the power consumption by adjusting the backlight intensity frame by frame to reach a specified image quality, the proposed method optimizes the image quality for a given backlight intensity. Image is enhanced by performing brightness compensation and local contrast enhancement. For brightness compensation, global image statistics and backlight level are considered to maintain the overall brightness of the image. For contrast enhancement, the local contrast property of human visual system (HVS) is exploited to enhance the local image details. In addition, a brightness prediction scheme is proposed to speed up the algorithm for display of video sequences. Experimental results are presented to show the performance of the algorithm.

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  1. Image enhancement for backlight-scaled TFT-LCD displays

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      Published In

      cover image IEEE Transactions on Circuits and Systems for Video Technology
      IEEE Transactions on Circuits and Systems for Video Technology  Volume 19, Issue 4
      April 2009
      156 pages

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      IEEE Press

      Publication History

      Published: 01 April 2009
      Received: 24 August 2007
      Revised: 03 March 2007

      Author Tags

      1. Contrast
      2. LCD backlight
      3. contrast
      4. image enhancement
      5. power management

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      • (2021)Perceptual backlight scaling for low power liquid crystal displays based on visual saliency2015 IEEE International Conference on Image Processing (ICIP)10.1109/ICIP.2015.7351402(3240-3244)Online publication date: 9-Mar-2021
      • (2020)Power-Constrained Image Contrast Enhancement Through Sparse Representation by Joint Mixed-Norm RegularizationIEEE Transactions on Circuits and Systems for Video Technology10.1109/TCSVT.2019.292520830:8(2477-2488)Online publication date: 3-Aug-2020
      • (2019)Visual-Quality Guided Global Backlight Dimming for Video Display on Mobile DevicesIEEE Transactions on Circuits and Systems for Video Technology10.1109/TCSVT.2018.287909429:11(3393-3403)Online publication date: 1-Nov-2019
      • (2018)Computationally efficient brightness compensation and contrast enhancement for transmissive liquid crystal displaysJournal of Real-Time Image Processing10.1007/s11554-016-0665-014:4(733-741)Online publication date: 1-Apr-2018
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