用于边缘图像不变矩的计算，得到的七个不变矩可用于神经网络进行识别。-Used for the calculation of moment invariants edge image, and get seven invariant moments can be used for neural network to recognize.

利用HU不变矩提取图像的特征，主要是形状特征，HU不变矩具有旋转缩放不变性-HU invariant moments using the image feature extraction, mainly shape characteristics, HU invariant moments with rotation scaling invariance