摘要
针对现有平面镜反射标定方法的不足,提出了一种基于多摄像机全局标定的视线追踪系统标定方法。通过在屏幕对面放置一对标定摄像机与系统摄像机构成多摄像机系统,标定摄像机直接拍摄标定目标,测量系统摄像机、光源和屏幕之间的空间位置关系。通过多摄像机全局标定确定系统摄像机和标定摄像机的坐标转换关系。通过坐标转换最终标定出系统摄像机坐标系中摄像机、光源、屏幕的空间位置关系。该方法解决了屏幕和光源不在系统摄像机视野范围内的问题,减小了图像误差。系统标定结果验证了该方法的有效性,同时为其他同类系统标定提供了一种解决问题的思路。
Aiming at the shortcoming of existing reflector calibration approach,a system calibration approach based on global calibration of multi-cameras is proposed.A stereo vision system used for calibration is placed in front of the gaze tracking system,which is made of a multiple camera system with stereo vision of gaze system.The calibration vision system is used to shoot the light source and screen,and their relation is measured.Coordinate transformation parameters are captured with the multi-camera global calibration.Finally the location relations of system camera,light source and screen are calibrated based on the coordinate transformation parameters.Calibration results show that the proposed method is effective.The approach also gives an idea for other similar system calibration.
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2011年第4期883-891,共9页
Chinese Journal of Scientific Instrument
基金
国家自然科学基金(60574090)
北京市教育委员会重点学科共建项目(XK100080537)资助
关键词
视线追踪
红外光源
系统标定
全局标定
坐标转换
gaze tracking
infrared light source
system calibration
global calibration
coordination transformation
