仿真假体视觉下的寻路任务研究  

Research on pathfinding task under simulated prosthetic vision

作　　者：赵瑛[1] 蒋广琪 耿秀琳 李琦[1] ZHAO Ying;JIANG Guangqi;GENG Xiulin;LI Qi(School of Information Engineering,Inner Mongolia University of Science and Technology,Baotou 014010,China)

机构地区：[1]内蒙古科技大学信息工程学院,内蒙古包头014010

出　　处：《现代电子技术》2018年第14期173-177,共5页Modern Electronics Technique

基　　金：国家自然科学基金(81460279);内蒙古自治区自然科学基金(2015MS0604);内蒙古自治区高等学校科学研究项目(NJZY145);包头市科技计划项目(2015C2006-14);内蒙古科技大学创新基金(2014QNGG08)~~

摘　　要：在现实场景中开展仿真假体视觉下寻路任务研究。受试者佩戴头戴式显示器,由显示器上方的摄像装置获取外界图像,并通过数据传输线连接电脑对实时场景图像进行像素化处理。实验采用标准轮滑桩摆设实验通路,要求受试者佩戴头戴式显示器在预先摆设通路中寻路和判别方向,并对寻路时间、寻路碰撞次数等进行分析研究。结果表明:分辨率为64×64时寻路时间最短;分辨率由32×32增加至48×48,寻路时间减少40%,碰撞次数减少43%;分辨率由48×48增至64×64,寻路时间减少22%,碰撞次数减少31%。随着实验分辨率提升,寻路时间和碰撞次数明显减少。受试者性别和实验时间(白天/晚上)无显著性差异,女性受试者在白天实验效果较好。该研究可为人工视觉假体系统的设计和开发提供前期的理论储备。The pathfinding task under simulated prosthetic vision is studied in the realistic scene. The subject wears a headmounted displayer,the external images are obtained by the photographing device above the displayer,and pixelized processing of real-time scene images is performed by connecting the displayer and photographing device to the computer via the data transmission line. In the experiment,the standard roller skating piles were used to lay the experimental channel,the subject was asked to find the path and discriminate the direction in the pre-laid channel after wearing a head-mounted displayer,and the pathfinding time and collision times were analyzed and researched. The results show that when the resolution ratio is 64×64,the pathfinding time is the shortest;when the resolution ratio increases from 32×32 to 48×48,the pathfinding time decreases by40%,and the collision times decrease by 43%;when the resolution ratio increases from 48×48 to 64×64,the pathfinding time decreases by 22%,and the collision times decrease by 31%. As the experimental resolution ratio increases,the pathfinding time and collision times decrease significantly. The subject′ gender and the experimental time（day or night）have no significant influence on the pathfinding time,and the female subjects have better experimental results during the day. The research can provide an early-stage theoretical reserve for the design and development of the artificial visual prosthetic system.

关 键 词：寻路任务 视觉假体 像素化处理 分辨率 寻路时间 碰撞次数 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]