基于视网膜光反射,提出了一种只需要简单算法的实时人眼定位方法。通过确定人眼相对于点光源的空间方位的实验,证明了该人眼定位方法的可行性。在这种人眼定位方法中,如果在点光源形成的锥形照明区域中没有人眼,那么CCD接收的图像将是一个均匀的暗背景图像,且图像中没有亮斑存在;如果在该锥形照明区域中有人眼,那么CCD接收的图像将是一个具有均匀暗背景和存在微小亮斑的图形。根据该微小亮斑在CCD接收图像中的位置,可以判断人眼存在与否的状态,计算人眼相对于点光源的空间方位及位置。

On the basis of the retinal light reflection, a method for real time eye location is proposed. Its feasibility is proved through the primary experiment of the judgment of the eye orientation. In this method, if there are no eyes in the cone-shaped illumination region of a point light source, no light spot also exists at the CCD and the image received by the CCD is an equably dark background. However, if there is an eye in the cone-shaped illumination region, the image captured by the CCD is a small bright light spot with dark background. The existent state, the orientation, and the location, relative to the point light source, of the eye can be derived from the position of the small bright light spot at the image captured by the CCD.