Sift-based feature matching, need to use gsl library

sift
....\SIFT_VC
....\.......\beaver.png
....\.......\beaver_xform.png
....\.......\Debug
....\.......\.....\imgfeatures.obj
....\.......\.....\kdtree.obj
....\.......\.....\match.obj
....\.......\.....\minpq.obj
....\.......\.....\sift.obj
....\.......\.....\SIFT_VC.exe
....\.......\.....\SIFT_VC.ilk
....\.......\.....\SIFT_VC.pch
....\.......\.....\SIFT_VC.pdb
....\.......\.....\utils.obj
....\.......\.....\vc60.idb
....\.......\.....\vc60.pdb
....\.......\.....\xform.obj
....\.......\downimg_matched_points.xml
....\.......\dspfeat.c
....\.......\imgfeatures.c
....\.......\imgfeatures.h
....\.......\kdtree.c
....\.......\kdtree.h
....\.......\match.c
....\.......\match.cpp
....\.......\minpq.c
....\.......\minpq.h
....\.......\sift.c
....\.......\sift.h
....\.......\siftfeat.c
....\.......\SIFT_VC.dsp
....\.......\SIFT_VC.dsw
....\.......\SIFT_VC.ncb
....\.......\SIFT_VC.opt
....\.......\SIFT_VC.plg
....\.......\upimg_matched_points.xml
....\.......\upimg_matched_points.yml
....\.......\utils.c
....\.......\utils.h
....\.......\xform.c
....\.......\xform.h

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