SIFT keypoints of objects are first extracted from a set of reference images[4] and stored in a database. An object is recognized in a new image by individually comparing each feature from the new image to this database and finding candidate matching features based on Euclidean distance of their feature vectors. From the full set of matches, subsets of keypoints that agree on the object and its location, scale, and orientation in the new image are identified to filter out good matches. The determination of consistent clusters is performed rapidly by using an efficient hash table implementation of the generalized Hough transform.

SIFTflow
........\computeColor.m
........\demo.m
........\flowToColor.m
........\Mars-1.jpg
........\Mars-2.jpg
........\mexDenseSIFT
........\............\dir.cpp
........\............\dir.h
........\............\Image.h
........\............\ImageFeature.h
........\............\ImageIO.h
........\............\ImageProcessing.h
........\............\Matrix.cpp
........\............\Matrix.h
........\............\mexDenseSIFT.cpp
........\............\mexDenseSIFT.m
........\............\mexDenseSIFT.mexmaci64
........\............\mexDenseSIFT.mexw64
........\............\pcSIFT.mat
........\............\project.h
........\............\readme.txt
........\............\showColorSIFT.m
........\............\Vector.cpp
........\............\Vector.h
........\mexDiscreteFlow
........\...............\BPFlow.cpp
........\...............\BPFlow.h
........\...............\Image.h
........\...............\ImageIO.h
........\...............\ImageProcessing.h
........\...............\main.cpp
........\...............\mexDiscreteFlow.cpp
........\...............\mexDiscreteFlow.m
........\...............\mexDiscreteFlow.mexmaci64
........\...............\mexDiscreteFlow.mexw64
........\...............\project.h
........\...............\readme.txt
........\...............\Stochastic.cpp
........\...............\Stochastic.h
........\readme.txt
........\SIFTflowc2f.m
........\warpFL.m
........\warpFLColor.m
........\warpImage.m

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