OpenCV圖像匹配算法之surf

    //surf.cpp


#include "stdafx.h"  
#include <cv.hpp>  
#include <highgui.h>  
#include "utils.h"  
#include <iostream>  
using namespace std;  

void surf(char* path1, char* path2, INFO& info, bool show)  
{  
    double t1,t2;  
    t1=cvGetTickCount();  

    initModule_nonfree();  

    Mat img1, img2;  
    img1=imread(path1,0);  
    img2=imread(path2,0);  
    if(img1.data==NULL)  
    {  
        cout<<"The image can not been loaded: "<<path1<<endl;  
        system("pause");  
        exit(-1);  
    }  
    if(img2.data==NULL)  
    {  
        cout<<"The image can not been loaded: "<<path2<<endl;  
        system("pause");  
        exit(-1);  
    }  

    int minHessian=200;  
    SurfFeatureDetector surf_detector(minHessian) ;  
    SurfDescriptorExtractor surf_descriptor ;    
    vector<KeyPoint> kpts1_surf, kpts2_surf;  
    Mat desc1_surf, desc2_surf;  
    Ptr<cv::DescriptorMatcher> matcher_l2 = DescriptorMatcher::create("BruteForce");          //歐氏距離匹配  
    vector<vector<DMatch> > dmatches_surf;  
    vector<Point2f> matches_surf, inliers_surf;  

    surf_detector.detect(img1,kpts1_surf);  
    surf_detector.detect(img2,kpts2_surf);  
    info.n1 = kpts1_surf.size();  
    info.n2 = kpts2_surf.size();  

    surf_descriptor.compute(img1,kpts1_surf,desc1_surf);  
    surf_descriptor.compute(img2,kpts2_surf,desc2_surf);  
    matcher_l2->knnMatch(desc1_surf,desc2_surf,dmatches_surf,2);  
    matches2points_nndr(kpts1_surf,kpts2_surf,dmatches_surf,matches_surf,DRATIO);  
    info.m=matches_surf.size()/2;  
    compute_inliers_ransac(matches_surf,inliers_surf,MIN_H_ERROR,false);  
    info.rm=inliers_surf.size()/2;  

    t2=cvGetTickCount();  
    info.t=(t2-t1)/1000000.0/cvGetTickFrequency();  

    Mat img1_rgb_surf = imread(path1,1);  
    Mat img2_rgb_surf = imread(path2,1);  
    Mat img_com_surf = Mat(Size(img1.cols*2,img1.rows),CV_8UC3);  

    if(show == true)  
    {  
        draw_inliers(img1_rgb_surf,img2_rgb_surf,img_com_surf,inliers_surf,2);  
        imshow("surf",img_com_surf);  
        waitKey(0);  
    }  

    return;  
}  </pre> 


 使用
    INFO surf_info;  
    surf(path1,path2,surf_info,false);  
    showInfo(surf_info);