通过设备的VID和PID获取对应的设备ID，可用于OpenCV打开摄像头，VideoCapture::open()。-Get device ID which can be used for opencv PID,VID.

基于opencv的机器视觉识别程序。robomaster比赛中用到的基于敌方的颜色和轮廓的识别，可以实现自动追踪等功能。-Opencv based machine vision recognition program. robomaster game used to identify the enemy' s color and contour-based tracking and other functions can be achieved automatically.