摘要
针对近眼显示设备存在显示功耗较大的问题,通过研究人眼视觉的特性提出一种人眼凝视点自适应的区域梯度调光算法。首先进行中心凹-亮度掩蔽实验以获取人眼的恰可觉差(Just Noticeable Difference,JND),并在此基础上改进了传统人眼凝视点的几何光路模型,得到更符合人眼自适应特性的几何光路模型,引入最大视角判别法有效提高了视角计算效率。随后,对图像进行预处理时采用改进的对比度增强算法,以在保持图像平均显示亮度基本不变的情况下增强显示效果。根据实验得到的JND阈值和凝视点信息,对图像实施了区域和全局功耗限制,从而在降低功耗的同时保持了视觉主观感受。在FPGA硬件平台上完成了算法的验证。实验结果表明,该算法在柯达标准测试集下使硅基有机发光二极管(Organic Light Emitting Diode,OLED)微显示器的显示功耗降低23.05%,基本满足硅基OLED微显示器的低功耗显示的要求,可为其性能提升提供指导。
In addressing the high power consumption of near-eye display devices,this paper introduces a region gradient dimming algorithm that adapts to the human eye's gaze point,informed by studies on hu⁃man visual characteristics.Initially,a central fovea-brightness masking experiment established the Just No⁃ticeable Difference(JND)threshold for the human eye.This data refined the traditional geometric optical path model of the eye gaze point,resulting in a model that aligns more closely with the eye's adaptive char⁃acteristics.The method significantly improved the efficiency of viewing angle calculations through a maxi⁃mum viewing angle discrimination approach.An enhanced contrast algorithm was then applied during im⁃age preprocessing to improve the display quality while preserving the image's average brightness.Utilizing the JND threshold and gaze point data,the algorithm applied both regional and global power consumption limits to the image,reducing power usage while maintaining subjective visual perception.The algorithm underwent validation on an FPGA hardware platform,demonstrating a reduction in display power con⁃sumption for silicon-based Organic Light Emitting Diode(OLED)microdisplays by up to 23.05%on the Kodak standard test set.This achievement suggests that the low-power requirements for silicon-based OLED microdisplays are achievable,offering insights for performance enhancements.
作者
季渊
马新德
孙严睿
陈宝良
张引
JI Yuan;MA Xinde;SUN Yanrui;CHEN Baoliang;ZHANG Yin(Microelectronics Research and Development Center,Shanghai University,Shanghai 200444,China)
出处
《光学精密工程》
EI
CAS
CSCD
北大核心
2024年第9期1408-1419,共12页
Optics and Precision Engineering
基金
国家自然科学基金资助项目(No.61774101,No.61674100)。
关键词
区域梯度调光
凝视点自适应
微显示器
显示功耗
恰可觉差
region gradient dimming
gaze point adaptation
microdisplay
display power consumption
Just Noticeble Difference(JND)
