为了在序列图像或视频流中识别目标形状，对初始背景图像求差，结果经过阈值化，然后进行形态学滤波，最后通过计算判断图像中目标的形状。运用虚拟仪器软件LabVIEW平台，配合USB接口的网络摄像头实现系统功能。此方法简便易行，对图像或视频中的目标识别效果良好。-In order to sequence images or video stream to identify the target shape, the initial background image for poor results after thresholding, and then morphological filtering, the final judging by calculating the shape of the target image. The use of virtual instrument software LabVIEW platform to support the USB interface to achieve the network camera system. This method is simple, image or video of the target recognition results.