摘要
本文提出一种基于改进CDF方法的动态背光调整算法,该方法根据一幅图像的12个区域子图的灰度直方图,采用CDF方法得到各个区域的背光亮度系数,以最大CDF背光亮度系数作为全局背光亮度系数。限定背光亮度的亮度系数在0.6～0.9之间变化,在节省功耗的前提下,可以保证图像质量。实验结果表明,该改进方法提高了图像显示质量,明显降低了功耗,同时满足PSNR图像质量评价指标要求。
A dynamic global backlight dimming algorithm is proposed based on the analysis of the Cumulative Distribution Function （CDF） of 12 local images histogram. For each image, the proposed algorithm decided Backlight Luminance （BL） dynamically from maximum CDF luminance ratio of 12 local regions instead of the value of the whole image. Ratios of backlight luminance are defined between 0.6 and 0.9, in order to preserve quality of images and decrease power consumption. The experimental results show that the improved method significantly improves the image quality of Liquid Crystal Display （LCD） and substantially reduces the power consumption, which also meets requirement of the PSNR rule.
出处
《光电工程》
CAS
CSCD
北大核心
2012年第12期127-131,共5页
Opto-Electronic Engineering
基金
安徽省年度重点科研项目(11070203004)
安徽省博士后基金(200902)
