This program creates a rectangle when you click the mouse on the window, and stretches the rectangle until you release the mouse. This requires the creation of a mouse callback. For the main function we use a while loop that keeps redrawing each box

视频滚动条自动播放，每200帧跳动一次，而后循环播放。-Play the video scroll bar automatically, once every 200 jumps, and then loop.

The program connects and begins to grip the camera with cvCreateCameraCapture (), then get the width and height frame with cvGetCaptureProperty (). And then in the loop with cvQueryFrame () gets the image from the camera and displays the window.

本程序 尝试打开本电脑上的摄像头作为视频输入设备，或者将命令行的输入参数作为文件名来打开的视频文件。不管是哪一种方法，最后都是不断的循环处理一帧一帧地处理，涉及到的图像处理有 背景擦除，平滑滤波，二值化等。-The program tries to open the camera on the computer as a video input device, or enter the command line parameters as the file name to open the vi