Introduction - If you have any usage issues, please Google them yourself
With regard to SIFT of several classic IEEE papers, wanting to understand the SIFT algorithm and the use of SIFT algorithm image processing programmer of much help.
SIFTarti\Image matching for geomorphic measurement based on SIFT and RANSAC methods.pdf
........\Improved SIFT feature applied in image matching.pdf
........\Distinctive image features from scale-invariant keypoints.pdf
........\Optimized SIFT Image Matching Algorithm.pdf
SIFTarti