D.G lowe 的尺度不变特征转换算法（SIFT）在基于opencv和OpenGL的源码基础上增加了图像的保存功能。用于对图像的尺度不变特征的提取以及图像特征点的匹配-D.G lowe s scale invariant feature transform (SIFT) algorithm based on opencv and on the basis of OpenGL source to increase the function of image preservation. Used