A Method of Modifying Display Gray Levels for Reducing the Dynamic False Contour in Alternating Current Plasma Display Panel

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A Method of Modifying Display Gray Levels for Reducing the Dynamic False Contour in Alternating Current Plasma Display Panel

更新时间：2025-07-09

- A Method of Modifying Display Gray Levels for Reducing the Dynamic False Contour in Alternating Current Plasma Display Panel
- Vol. 43, Issue 10, Pages: 89-93(2009)
- 作者机构：
  
  西安交通大学电子物理与器件教育部重点实验室,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN873.94;TN911.73
- Online First：10 October 2009，
  
  Published：2009
- 稿件说明：
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A Method of Modifying Display Gray Levels for Reducing the Dynamic False Contour in Alternating Current Plasma Display Panel[J]. 2009, 43(10): 89-93.
DOI：

A Method of Modifying Display Gray Levels for Reducing the Dynamic False Contour in Alternating Current Plasma Display Panel[J]. 2009, 43(10): 89-93. DOI：

摘要

为了改善交流等离子体显示器(AC PDP)动态假轮廓现象

提出了一种显示灰度级调整方法.首先利用AC PDP实际采用的子场编码

通过运动图像畸变距离方法对动态假轮廓进行量化

然后选取不易产生动态假轮廓的灰度级作为输出显示灰度级.同时

采用数字半色调技术增强输出图像质量.一方面

采用就近阈值化的误差扩散方法有效地减小了量化误差较大时的误差扩散噪声; 另一方面

利用有序抖动方法处理低灰度级像素

从而使得运动图像既不易被察觉出动态假轮廓现象

又能在整个灰度级范围内产生较好的显示效果.将提出的方法应用于81 cm AC PDP中

实验结果表明

在不影响AC PDP显示画质的前提下

有效地缩减了动态假轮廓现象.

Abstract

A method of modifying display gray levels is proposed to reduce the dynamic false contour(DFC)in alternating current plasma display panel(AC PDP). The sub-field coding adopted in AC PDP is utilized to give a quantitative measure of the DFC by the motion picture distortion(MPD)distance method. Then

the gray levels in which the DFC is not observed are displayed. At the same time

the quality of the output image is enhanced by the digital halftoning technology. The noises generated by bigger quantified errors can be reduced effectively by the error diffusion method with accepting the nearest threshold. On the other hand

the pixels with the lower grayscale are processed by the ordered dithering method. Consequently

the DFC in the moving images can not be observed and the images are represented better in the whole grayscale scope. The proposed method is applied to an 81 cm AC PDP and experimental results show that the DFC in the moving images is reduced effectively under the premise that the image quality in AC PDP is not affected.

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references

YAMAGUCHI T, MASUDA T, KOHGAMI A, et al. Degradation of moving-image quality in PDPs: dynamic false contour [J]. Journal of SID, 1996, 4(4): 263-270.

ZHU D Q, LEACOCK T J. Method and apparatus for moving pixel distortion removal for a plasma display panel using minimum MPD distance code: USA, 5,841,413 [P]. 1998-11-24.

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刘祖军, 刘纯亮, 梁志虎, 等. 一种等离子体显示运动图像动态假轮廓评测新方法[J]. 西安交通大学学报, 2004, 38(10): 1076-1080.

LIU Zujun, LIU Chunliang, LIANG Zhihu, et al. Novel method for evaluating dynamic false contour of motion image in alternating current plasma display panel [J]. Journal of Xi'an Jiaotong University, 2004, 38(10): 1076-1080.

LUKAC R, PLATANIOTIS K N. Color image processing:methods and applications [M]. New York,USA: CRC Press, 2007: 433-436.

KNUTH D E. Digital halftones by dot diffusion [J]. ACM Trans on Graphics, 1987, 6(4): 245-273.

FLOYD R W, STEINBERG L. An adaptive algorithm for spatial greyscale [J]. Proceedings of the SID, 1976, 17(2): 75-77.

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