Indication Position Estimation by the Homography of Planes

摘要：

To get a rapid estimation of the users indication position in computer vision based noncontact humancomputer interaction (HCI) system, an indication position estimation method without explicitly calculating the cameras parameters. The homography matrix is calculated using the known points on the target plane and their corresponding points imaged by the cameras. By this homography relationship, the two lines which intersect at the indication point on the target plane are related with their corresponding lines on the image plane, thus the position of the indication point is estimated by detecting specific lines from images. Experimental results show that the average error of the homographic mapping is 0.726mm at the distance of 2.5m; meanwhile, the amplitude of errors rises by 2.6％ from the center to the fringe of the screen (size of the screen is 2500mm×1800mm). The precision and consistency of this method can satisfy the requirement of most applications in human-computer interaction.

关键词： computer vision human-computer ineraction homography matrix camera model

作者: Dong Zhihua Zhang Zhijiang Zeng Dan

作者单位: Key Laboratory of Specialty Fiber Optics and Optical Access Networks Shanghai University Shanghai, China

会议类型: 国际会议

会议名称: 2010 2nd International Conference on Signal Processing System(2010年信号处理系统国际会议 ICSPS 2010)

会议地点: 大连

会议语种:英文

页码: 1747-1750

在线出版日期: 2010-07-05（万方平台首次上网日期，不代表论文的发表时间）