SURF

This is surf(Speeded Up Features Robust) matlab code for detection keypoint and construct descriptor and matching

clc
clear all
close all
tic
I1=imreadbw（‘data/img3.jpg‘） ;
I2=imreadbw（‘data/img5.jpg‘） ;
points1 = detectSURFFeatures（I1）;
points2 = detectSURFFeatures（I2）; 
[f1 vpts1] = extractFeatures（I1 points1）;
[f2 vpts2] = extractFeatures（I2 points2）;
subplot（121）imshow（I1）; hold on;
strongestPoints = vpts1.selectStrongest（2000）;
strongestPoints.plot（‘showScale‘true）;
subplot（122）imshow（I2）; hold on;
strongestPoints = vpts2.selectStrongest（2000）;
strongestPoints.plot（‘showScale‘true）;

index_pairs = matchFeatures（f1 f2 ‘Prenormalized‘ false） ;
matched_pts1 = vpts1（index_pairs（: 1））;
matched_pts2 = vpts2（index_pairs（: 2））;
figure; showMatchedFeatures（I1I2matched_pts1matched_pts2‘montage‘）;
toc

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2013-01-29 19:13  SURF\data\
     文件       72310  2010-01-28 05:09  SURF\data\box.pgm
     文件      233055  2010-01-28 05:09  SURF\data\box.sift
     文件       10060  2010-01-28 05:09  SURF\data\circle.pgm
     文件        1362  2010-01-28 05:09  SURF\data\circle.sift
     文件      464954  2010-01-28 05:09  SURF\data\img3.jpg
     文件      467808  2010-01-28 05:09  SURF\data\img5.jpg
     文件      275111  2010-01-28 05:09  SURF\data\landscape-a.jpg
     文件      304723  2010-01-28 05:09  SURF\data\landscape-b.jpg
     文件       11101  2010-01-28 05:09  SURF\data\nest.png
     文件       17462  2010-01-28 05:09  SURF\data\nest2.bmp
     文件      337980  2010-01-28 05:09  SURF\data\vessel-1.pgm
     文件      337980  2010-01-28 05:09  SURF\data\vessel-2.pgm
     文件         730  2013-04-17 11:34  SURF\demo.m
     文件        4822  2013-01-29 11:53  SURF\detectSURFFeatures.m
     文件        9882  2011-08-30 23:03  SURF\extractFeatures.m
     文件        2353  2013-01-29 19:20  SURF\imreadbw.m
     文件       16335  2012-07-26 15:04  SURF\matchFeatures.m
     文件        8823  2013-01-29 22:16  SURF\showMatchedFeatures.m
     文件       35354  2013-01-29 20:45  SURF\SURFPoints.m