用DIRECT SHOW实现的视频捕捉,在捕捉过程中支持抓图功能.-used to achieve the video capture, the capture process support functions From Wikipedia.

视频采集程序，可以实现视频显示、及时抓图，我用来光学指纹采集仪的指纹图像采集-Video Collection procedures, video display can be achieved in a timely manner From Wikipedia, I used to optical fingerprint Acquisition Instrument fingerprint image acquisition