TFT-LCD在低背光状态下的图像增强算法

韩 峰; 魏廷存; 高德远

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TFT-LCD在低背光状态下的图像增强算法

成像技术与图像处理 | 更新时间：2020-08-12

- TFT-LCD在低背光状态下的图像增强算法
- Image Luminance and Contrast Enhancement Algorithm for Low Backlight Color TFT-LCD
- 液晶与显示 2009年24卷第5期页码：723-728
- 作者机构：
  
  西北工业大学计算机学院, 陕西西安 710072,E-mail:heixia140@yahoo.cn
- 作者简介：
- 基金信息：
- DOI：
  中图分类号： TN321+.5;TN911.73
- 收稿日期：2009-03-25，
  
  修回日期：1900-01-02，
  
  网络出版日期：2009-10-30，
  
  纸质出版日期：2009-10-30
- 稿件说明：
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韩峰;魏廷存;高德远. TFT-LCD在低背光状态下的图像增强算法[J]. 液晶与显示, 2009,24(5): 723-728

HAN Feng;WEI Ting-cun;GAO De-yuan. Image Luminance and Contrast Enhancement Algorithm for Low Backlight Color TFT-LCD[J]. 液晶与显示, 2009,24(5): 723-728
韩峰;魏廷存;高德远. TFT-LCD在低背光状态下的图像增强算法[J]. 液晶与显示, 2009,24(5): 723-728 DOI：

HAN Feng;WEI Ting-cun;GAO De-yuan. Image Luminance and Contrast Enhancement Algorithm for Low Backlight Color TFT-LCD[J]. 液晶与显示, 2009,24(5): 723-728 DOI：

摘要

在普通的手持显示设备中

降低背光亮度可以减小系统功耗

然而同时会导致显示图像的亮度和对比度下降

影响显示画质。通过分析TFT-LCD和HVS(Human Visual System)的特征

提出了一种在低背光状态下的图像增强算法

可以在较低背光亮度下通过补偿图像的亮度和对比度来增强图像的显示效果。所提出的算法可以根据图像的具体内容选择不同的补偿方式

与同类算法相比

补偿后的亮度值更高。实验结果表明

所提出的算法可以提高图像亮度

改善图像显示效果

从而能更有效地降低系统功耗。

Abstract

For a typical portable handset

substantial energy savings can be achieved by dimming backlight intensity levels

but it also decreases the contrast and brightness of the displayed image. This paper analyzes the characteristics of TFT-LCD and Human Visual System (HVS)

and then presents a dynamic dimming backlight algorithm to reduce power consumption while complementing image luminance and contrast to maintain the image quality. The algorithm proposed can choose backlight complementary method according to the contents of images

so it can achieve higher luminance than traditional methods. The experimental results indicate that the power dissipation of backlight can be significantly reduced while the desired image quality is maintained.

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references

. Simunic T, Benini L, Glynn P, et al. Event-driven power management [J]. IEEE Trans. on Computer-Aided Design of Integrated Circuits and Systems, 2001, 20:840-857.

. Chang Naehyuck,Choi Inseok, Shim Hojun. DLS: Dynamic backlight luminance scaling of liquid crystal display [J]. IEEE Trans on Very Large Scale Integration Systems, 2004, 12:837-846.

. Cheng Wei-Chung, Hou Yu, Pedram Massoud. Power minimization in a backlit TFT-LCD display by concurrent brightness and contrast scaling [J]. IEEE Consumer Electronics Society, 2004,50:25-32.

. Cheng Liang, Bossi Stefano, Mohapatra Shivajit. A backlight optimization scheme for video playback on mobile devices //Proc. Consumer Communications and Networking Conference, Las Vegas: IEEE Press, 2006: 833-837.

. Funt B V, Barnard K, Cardei V. Luminance-based multi-scale Retinex //Proc. Applied Imagery Pattern Recognition Workshop, Kyoto: IEEE Press, 1997: 330-333.

. Mantiuk Rafal, Myszkowski Karol, Seidel Hans-Peter. A perceptual framework for contrast processing of high dynamic range images [J]. ACM Trans. on Applied Perception, 2006, (3):286-308.

. Wang Zhou, Bovik Alan C. A universal image quality index [J]. IEEE Signal Processing Letters, 2002,9(3):81-84.

. Tsai Pei-Shan, Liang Chia-Kai, Chen Homer H. Image quality enhancement for low backlight TFT-LCD displays // IEEE International Conference on Image Processing, San Antonio: IEEE Press, 2007:473-476.

. Ali Iranli, Hanif Fatemi, Massoud Pedram, et al. HEBS: Histogram Equalization for Backlight Scaling //Proc. Design, Automation and Test in Europe, Munich: IEEE Press, 2005:346-351.

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