此程序计算图像的七个不变矩，提取出图像的形状特征，可用于图像检索。

此程序计算图像的七个不变矩 提取图像的形状特征 可用于图像的检索-This program calculates the image of the seven invariant moments can extract image shape features for image retrieval

Hu的七个不变矩在图像处理，尤其是特征提取方面是很重要的一个概念。本代码实现了图像的7个不变矩的计算和输出。- Hu s 7 moment invariants is significant in image processing,especially in feature seletcion. This code calculate them.

利用HU的七个不变矩作为形状特征向量,对输入图像数据的七维形状特征行向量进行提取。 - The seven invariant moments of HU are used as the shape feature vectors to extract the feature vectors of the seven dimensional shape of the input image data.