一种视线方向的三维估计方法磁

摘要

In order to get high‐performance gaze direction ,a kind of 3D view estimating method is put forward based on double cameras and double light source ,the purpose is to overcome the natural head moving large cases eye estimation accu‐racy .a method completely depended on the space geometry calculation is proposed to realize the user view point operation . Firstly ,the camera is calibrated ,and then the calibration of the camera is used to the three‐dimensional position of display screen and a light source for calibration .Because of the corneal curvature center and the pupil center on the same axis ,so the space of the optical axis direction is calculated by the corneal curvature center and the virtual pupil center to get .Secondly the visual axis is determined ,the article does not directly estimation deviation angle of optical axis and visual axisof Kappa ,But by rotation matrix of a 3*3 M indirectly obtained the relationship between the optical axis andvisual axis ,to determine the visual axis direction .Finally through calculation the intersection of the visual axis and screen ,the fixation point is gotten .%为了得到高性能的视线方向，论文提出了一种基于双摄像机和双光源的三维视线估计方法，以克服自然头动较大情况下视线的估计准确性。论文提出了一种完全依靠空间几何计算实现用户视线落点运算的方法。首先对摄像机进行标定，然后利用已标定的摄像机再对显示器屏幕和光源的三维位置进行标定；由于角膜曲率中心和瞳孔中心在同光轴上，所以通过计算得到角膜曲率中心和虚瞳孔中心来确定光轴的空间方向；其次确定视轴，论文没有直接估计光轴和视轴偏差角Kappa ，而是通过标定一个3*3的旋转矩阵 M间接求得光轴和视轴的关系，以此确定视轴方向；最后通过计算得到视轴与屏幕的交点，即注视点。