摘要
为了实现头部自由运动下的屏幕凝视点准确估计,设计一套基于场景摄像机和屏幕四角红外灯的头戴式视线跟踪系统。利用投影空间的不变量cross-ratio将凝视点在参考屏幕上的位置转化为当前屏幕上的实际位置,并在场景摄像机坐标系下对头部转动造成的视觉误差进行补偿。实验结果表明,该方法可以将误差控制在一个较小的可接受的范围内,同时避免了复杂的多摄像机装置和立体匹配计算。
A novel head-mounted gaze tracking system is designed to implement accurate estimation of screen gaze point with the head freely moving： It is based on scene camera （ a camera on the helmet） and four IR LEDs being fixed on the corners of the screen. It utilises an invariant value of projective space （cross-ratio） to do a transformation of the gaze point from the position on reference screen to actual position on current screen. The compensation for visual error caused by head rotation will be done in the scene camera coordinate system. Experimental results show that the proposed method can control the error to an acceptable range, while escapes from multiple cameras devices and stereo matching computation.
出处
《计算机应用与软件》
CSCD
2015年第7期163-166,共4页
Computer Applications and Software
基金
国家自然科学基金委-广东省联合基金重点项目(U0835002)
