用matlab调用摄像头，调用的是电脑自带的摄像头，运行之后出现一个摄像头窗口(未进行二值化灰度处理，因此是正常彩色图像。)(Using MATLAB to call the camera, it calls the camera that comes with the computer. After running, there is a camera window (no two value grayscale processing), so it's a normal color image. ))