基于人眼视觉的电润湿电子纸图像分层映射技术研究  

Research on hierarchical mapping technology of electrowetting electronic paper based on human visual system

作　　者：李甜甜 林珊玲 林志贤[1,2] 郭太良[1,2] 唐彪 Li Tiantian;Lin Shanling;Lin Zhixian;Guo Tailiang;Tang Biao(Institute of Optlelectronic Display,National&Local United Engineering Lab of Flat Panel Display Technology,Fuzhou University,Fuzhou 350116,China;College of Physics and Telecommunication Engineering,Fuzhou University,Fuzhou 350116,China;Guangdong Provincial Key Laboratory of Optical Information Materials and Technology,South China Academy of Advanced Optoelectronics,South China Normal University,Guangzhou 510006,China)

机构地区：[1]福州大学平板显示技术国家地方联合工程实验室,福建福州350116 [2]福州大学物理与信息工程学院,福建福州350116 [3]华南师范大学华南先进光电子研究院广东省光信息材料与技术重点实验室,广东广州510006

出　　处：《电子技术应用》2020年第3期86-91,共6页Application of Electronic Technique

基　　金：国家重点研发计划课题(2016YFB0401503);广东省科技重大专项(2016B090906001);福建省科技重大专项(2014HZ0003-1);广东省光信息材料与技术重点实验室开放基金资助项目(2017B030301007)

摘　　要：针对电润湿显示器显示图像对比度不高、视觉信息损失等问题,提出一种基于人眼视觉的图像分层映射技术。首先,将图像分为基本层和细节层,对基本层进行亮度增强;对增强后图像利用韦伯-费希纳定律分区,实现分区对数映射,并与细节层加权融合为输出图像;同时为实现电润湿显示器的精准调制,进行亮度局部线性拉伸。实验结果表明,相较于传统映射方法 ,该算法的熵值更接近原图,图像评价指标PSNR值、SSIM值、UIQI值分别提高了0. 2~0.6, 0.07~0.4, 0.1~0.6。所提方法使得校正后电压与亮度的关系更接近线性,在电润湿显示器上的图像细节更清晰,对比度得到提高,整体视觉效果较好。Aiming at the problem of poor image contrast and loss of visual information on electrowetting electronic paper display,this paper proposes an image hierarchical mapping technique based on human visual system.Firstly, the image is decomposed into the base layer and the detail layer, and the brightness of the base layer is enhanced.Then, the enhanced image is partitioned by Weber-Fechner law to realize the partition logarithmic mapping, and weighted and merged with the detail layer as the output image.At the same time, in order to achieve precise modulation of the electrowetting display, the brightness is local linearly stretched.The experimental results show that compared with traditional mapping methods, the entropy value of the algorithm in this paper is closer to the original map, the PSNR, SSIM and UIQI values of image evaluation index are respectively improved by 0.2~0.6, 0.07~0.4 and 0.1~0.6.The method makes the relationship between the corrected voltage and brightness more linear, increases the image details on the electrowetting electronic paper, improves the contrast, and the overall visual effect is better.

关 键 词：电润湿显示器 人眼视觉 韦伯-费希纳定律 分区对数映射 亮度局部线性拉伸 

分 类 号：TN391[电子电信—物理电子学]