面向残障人士的基于眼动交互的绘画系统

摘要

The paper describes an eye-conolled painting system which enables people with severe mobility impairments to draw just by moving their eyes. We design and implement the system,and also propose some algorithms to improve the performace of eye-tracking interaction. We present a time-domain constrained eye-tracking clustering algorithm to detect fixations,and then identify eye movement behaviors, which can reduce the "Midas touch" problem. We also present a window-adaptive discrete Gaussian smoothing algorithm, which can filter noise and smooth the path of eye-movement in a reasonable way.%本文建立了一个面向严重肢体残障人士的眼动交互绘画系统.为此,首先给出了眼动数据的预处理与分析方法;为减弱米达斯(Midas)接触问题对眼动行为判别的影响,提出了基于时域约束的注视点聚类算法,可提取出注视点判断用户当前的视点中心,并据此进一步判断用户眼睛行为;针对眼动原始数据中的噪声影响,设计了窗口长度自适应的视点信号平滑处理方法,可减弱视点抖动产生的噪声,实现自由绘画较为平稳的绘画轨迹.在此基础上,设计并实现了基于ASL眼动仪的眼动交互式绘画系统.