It acquires video data by calling VFW function through the video camera on VC++ platform,and divide prospect and background data by using the video frame-difference algorithm.

• 探讨了在VC++6.；0平台上；调用VFW函数通过摄像头实时采集视频数据；利用帧间差分算法对视频数据进行前景和背景的分割；用迭代法计算出用做其分割的阀值大小。