Assisting Visually Impaired People to Acquire Targets on a Large Wall-Mounted Display

查看全文 作　　者：Kibum [1]Kim;[1]Member;[1]ACM;[1]IEEE;[1]任向实;Senior [1]Member 机构地区：[1]Center for Human Computer Interaction, Kochi University of Technology, Kochi 782-8502, Japan 出　　处：《Journal of Computer Science & Technology》索引2014年第29卷第5期,共12页 基　　金：partially supported by the National Natural Science Foundation of China under Grant No.61228206;the Grant-in-Aid for Scientific Research of Japan under Grant Nos.23300048 and 25330241 摘　　要：Large displays have become ubiquitous in our everyday lives,but these displays are designed for sighted people.This paper addresses the need for visually impaired people to access targets on large wall-mounted displays.We developed an assistive interface which exploits mid-air gesture input and haptic feedback,and examined its potential for pointing and steering tasks in human computer interaction(HCI).In two experiments,blind and blindfolded users performed target acquisition tasks using mid-air gestures and two different kinds of feedback(i.e.,haptic feedback and audio feedback).Our results show that participants perform faster in Fitts’law pointing tasks using the haptic feedback interface rather than the audio feedback interface.Furthermore,a regression analysis between movement time(MT)and the index of difficulty(ID)demonstrates that the Fitts’law model and the steering law model are both effective for the evaluation of assistive interfaces for the blind.Our work and findings will serve as an initial step to assist visually impaired people to easily access required information on large public displays using haptic interfaces. 关 键 词：显示屏 壁挂式 大屏幕显示器 触觉反馈 人机交互 探测任务 运动时间 回归分析