中文说明： opticalFlow = 视觉。OpticalFlow返回一个光流系统对象， opticalFlow。此对象估计从到另一个图像或一个视频帧到另一个物体运动的速度与方向。
English Description：
opticalFlow = vision.OpticalFlow returns an optical flow System object, opticalFlow. This object estimates the direction and speed of object motion from one image to another or from one video frame to another. Click the file on the left to start the preview,please ！The preview only provides 20% of the code snippets, the complete code needs to be downloaded Loading Report