双目USB摄像头通过OpenCV进行实时显示，通过按C/c键截取图像，按Q/q退出程序。-two usb cameras display on two windows, press keyboard C/c to snap two images pairs, press Q/q to quit

基于opencv的arm向pc网络传输，传输后自动显示图像(The opencv based arm transfers to the PC network and automatically displays the image after transmission)