采用VMR9完成对视频的采集，可以采集多个摄像头。能够对图像进行抓屏。对抓屏数据进行Sobel处理，可以辨别图像中的线条。-use VMR9 completed the acquisition of video, can be collected over a camera. Images can Capturing the Screen. Capturing the Screen right Sobel data processing, image can be identified line