改进的S形曲线全局动态调光算法  

An Improved S-shaped Curve Global Dimming Algorithm

作　　者：张磊[1,2] 吕国强[1,2,3] 韩东[1,4] 刘芬[1,4] 冯奇斌[1,3] 

机构地区：[1]合肥工业大学特种显示技术教育部重点实验室,特种显示技术国家工程实验室,现代显示技术省部共建国家重点实验室,合肥230009 [2]合肥工业大学计算机与信息学院,合肥230009 [3]合肥工业大学光电技术研究院,合肥230009 [4]合肥工业大学仪器科学与光电工程学院,合肥230009

出　　处：《光电工程》2014年第11期51-57,共7页Opto-Electronic Engineering

基　　金：安徽省2012科技计划资助项目(1206c0805007);国家863高技术项目(2012AA011901)

摘　　要：针对S形曲线全局动态调光算法对人脸图像处理的不足,提出了一种改进的S形曲线全局动态调光算法。通过对输入图像信号进行变换,判定图像中是否存在人脸,并据此调整生成的S形曲线,对像素值进行补偿并调节背光输出。仿真结果显示,改进后的算法可以准确检出人脸图像,并有效地提升了人脸图像的显示效果。样机测试结果表明,液晶电视的图像质量有明显提升且平均能耗下降21.28%。In order to overcome the shortcoming of previous S-shaped curve global dimming algorithm for face image, an improved S-shaped curve global dimming algorithm is proposed. The images containing faces are first figured out based on several format kinds of signals. The S-shaped curve is then established to compensate the LC pixels. Simulation results show that the improved algorithm can detect face image accurately and increase the displayed image quality effectively. Prototype testing results show that the image quality of LCD TV has improved significantly and the average display energy consumption decreases by 21.28%.

关 键 词：人脸检测 全局调光 对比度 功耗损耗 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]