PDP低灰度级图像反伽马校正色彩还原方法  

Color Reproduction in Low Gray Level Corrected Gamma for AC Plasma Display Panel

作　　者：韦海成[1] 张小宁[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,西安710049

出　　处：《真空科学与技术学报》2012年第5期394-398,共5页Chinese Journal of Vacuum Science and Technology

基　　金：核高基:PDP显示控制芯片开发与产业化(2009ZX01033-001-003-5);国家自然科学基金资助项目(60901044)

摘　　要：为了解决等离子体显示器(PDP)反伽马校正中低灰度级增强引起的色彩失真和偏移,提出了一种低灰度级图像色彩还原方法。该方法先利用HSI色彩空间模型对图像的色调、饱和度、强度分量进行分析,得到了色调恒常性和RGB三色校正的关系,然后计算出图像低灰度级增强的色彩补偿参数。最后将所得参数从HSI转换到RGB色彩空间,直接对RGB三基色分量处理,有较好的实时性和硬件可实现性。实验结果表明,该方法解决了伽马校正中的低灰度级图像色调偏移和色彩失真现象,校正后的图像色调和饱和度误差均小于2.2%,具有很好的色彩显示效果。A novel color reproduction technique was proposed to reduce the color distortion, resulted from the low- gray level corrected gamma, of the plasma display panel. In the newly-developed technique,first, the hue （H）, saturation （S）, and intensity （I） of the HSI color model were evaluated to get the conditions of the color invariant. Next, the color reproductive factor of RGB channel was calculated for the color constancy. Finally, the calculated variables were trans- formed from HIS to RGB space,and R, G,and B components were processed,respectively,because of the real-time nature and easy hardware realization. The simulated results show that the proposed method significantly reduces the low gray level color distortion. The mean square error,caused by the color correction, was found to be less than 2.2% ;and the low gray level of the image is improved, also.

关 键 词：等离子显示器 反伽马变换 HSI 图像增强 

分 类 号：TN873.94[电子电信—信息与通信工程]