用matlab调用电脑摄像头显示图像，可以用来给matlab处理图像-Show the webcam by using matlab.

Matlab中选择摄像头，从摄像头得到图像的程序。当系统中有多个webcam时，能够列出并允许用户选择想用的。-Matlab select camera images from the camera to get the procedure. When there are multiple webcam, can list and allows the user to select the desired use.