采用自适应有限灰度级子场编码方法提高等离子体显示器的显示质量  

Improvement of PDP Image Quality by Using Adaptive Limited Grays Subfield Coding Method

作　　者：郑晓庆[1] 张小宁[1] 梁志虎[1] 刘纯亮[1] 

机构地区：[1]西安交通大学电子物理与器件教育部重点实验室,陕西西安710049

出　　处：《液晶与显示》2011年第6期853-857,共5页Chinese Journal of Liquid Crystals and Displays

摘　　要：为了改善等离子体显示器的动态显示质量,在减轻动态假轮廓的同时提高灰度显示质量,提出了基于直方图均衡化的自适应有限灰度级子场编码方法。该方法首先对输入图像进行直方图均衡化,在灰度"均匀分布"的新直方图上,按子场的数目平均划分灰度区间,选取每个区间中间的灰度级作为预采样灰度级;然后将预采样灰度级按照直方图均衡化的反函数进行映射,得到采样灰度级和子场编码。为了达到更好的灰度显示效果,在累积式灰度编码中,依次限定单个子场编码为零,从而得到更多的显示灰度级。仿真实验结果表明,该方法能在动态假轮廓改善和灰度级表现能力之间取得平衡,在减轻动态假轮廓的同时弥补了"累积式"发光显示灰度级不足的问题,得到了较好的显示效果。To improve the dynamic and static image quality,a new adaptive limited grays subfield coding method based on histogram equalization was proposed.In this method,a new probability density distribution was obtained by image histogram equalization.The gray scales were divided uniformity according to the number of subfield,and the grays in middle of each sub-section as the pre-sample grays were selected.The sample grays and subfield coding were obtained through the inverse transformation of histogram equalization.A subfield was set to zero for one gray coding to get the better image quality.Simulation results show that the proposed method has the advantages of simple-accumulation and combination lighting modes.It can improve the dynamic false contrast and gray scales expression simultaneously.

关 键 词：等离子体显示器 直方图均衡化 有限灰度级子场编码 

分 类 号：TN873[电子电信—信息与通信工程]