用OpenCV做的，先对图像做预处理，再求取图像中目标区域的归一化中心矩或者Hu矩。使用前先对VC++6.0进行OpenCV环境设置。-OpenCV to do with the first image preprocessing to do, and then strike the target area image normalized central moments or Hu moments. Before the use of VC++ 6.0 for OpenCV environme