这是一个关于SIFT算法介绍的pdf和ppt的合集，可以很好地帮助初学者了解sift算法。（中英文都有）-This is a collection of pdf and ppt about SIFT algorithm. I believe it can greatly help beginners to understand SIFT algorithm.

sift算法的ppt教程。很详细，公式解析很到位，很多不明白的细节都讲解的很详细-sift algorithm ppt tutorial. Very detailed analytic formula is in place, many do not understand the details of the very detailed