The original author of the pca-sift procedures, Lowe' s sift made certain improvements.

pca-sift\pcasift-0.91nd\aclocal.m4
........\..............\AUTHORS
........\..............\ChangeLog
........\..............\config.h.in
........\..............\configure
........\..............\configure.ac
........\..............\COPYING
........\..............\depcomp
........\..............\.ocs\README
........\..............\Doxyfile
........\..............\gathergrads.cc
........\..............\getpatches.cc
........\..............\gpcavects.txt
........\..............\image.cc
........\..............\image.h
........\..............\INSTALL
........\..............\install-sh
........\..............\keypoint.cc
........\..............\keypoint.h
........\..............\Makefile.am
........\..............\Makefile.in
........\..............\missing
........\..............\mkinstalldirs
........\..............\NEWS
........\..............\README
........\..............\recalckeys.cc
........\training-matlab\training\pca.m
........\...............\........\pcag.m
........\...............\........\ploteigs.m
........\...............\........\ploteigs2.m
........\...............\........\readeigs.m
........\...............\........\runpca.m
........\pcasift-0.91nd\docs
........\training-matlab\training
........\pcasift-0.91nd
........\training-matlab
pca-sift

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