在mac_os下用光线追踪算法显示图像，可以增加光源，包括反射、阴影、折射-In mac_os display images using ray tracing algorithm can increase the light source, including reflections, shadows, refraction

基于OpenCV的摄像头凝视追踪基于Fabian Timm的眼睛中心算法简单的图像梯度-Camera gaze tracking based on Timm OpenCV eye center algorithm based on Fabian simple image gradient