基于opencv的两个摄像头数据采集.实现功能：同时采集两路USB摄像头数据，并显示，具有图片保存功能（点击左键保存图片，并暂停视频；右键继续视频）。-Opencv-based data acquisition of two cameras. Functions: simultaneous acquisition of two-way USB camera data, and save the picture (click the left mouse button to save the image, and pause the video　right to continue to video).