%?This?m-file?demoes?the?usage?of?SIFT?functions.?It?generates?SIFT?keypionts?and?descriptors?for?one?input?image.?
%?Author:?Yantao?Zheng.?Nov?2006.??For?Project?of?CS5240


%?Add?subfolder?path.
main;?
clc;
clear;

img1_dir?=?‘demo-data\‘;

img1_file?=?‘beaver11.bmp‘;

I1=imreadbw（[img1_dir?img1_file]）?;?
I1_rgb?=?imread（[img1_dir?img1_file]）?;?
I1=imresize（I1?[240?320]）;

I1_rgb?=imresize（I1_rgb?[240?320]）;
I1=I1-min（I1（:））?;?%圖像插值縮放可能產(chǎn)生值超出0-1的范圍的像素
I1=I1/max（I1（:））?;?%這兩步重新歸一化圖像縮放后的數(shù)據(jù)

%fprintf（‘CS5240?--?SIFT:?Match?image:?Computing?frames?and?descriptors.\n‘）?;
[frames1descr1gss1dogss1?]?=?do_sift（?I1?‘Verbosity‘?1?‘NumOctaves‘?4?‘Threshold‘??0.1/3/2?）?;?%0.04/3/2



figure（1）?;?clf?;?plotss（dogss1）?;?colormap?gray?;
drawnow?;

figure（2）?;?clf?;
imshow（I1_rgb）?;?axis?image?;

hold?on?;
h=plotsiftframe（?frames1?）?;?set（h‘LineWidth‘1‘Color‘‘g‘）?;

?屬性????????????大小?????日期????時間???名稱
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?????文件????????402??2008-12-04?15:25??FingerPrint\A1.m

?????文件????????866??2009-05-27?17:20??FingerPrint\DistEuclidian.m

?????文件?????120054??2007-07-24?09:47??FingerPrint\Empreinte.bmp

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???????????????121322????????????????????3