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#include 
   
    #include 
    
     #include 
     
      #include 
      
       #include 
       
        #include 
        
         using namespace std;using namespace cv;vector
         
           ransac(vector
          
            queryKeyPoint,vector
           
             trainKeyPoint,vector
            
              matches);int main(int argc,char* argv[]){ //定义图像 Mat queryImage,trainImage; //读取图像 queryImage = imread("3.jpg",IMREAD_COLOR); trainImage = imread("4.jpg",IMREAD_COLOR); //判断是否读取图像 if(queryImage.empty() || trainImage.empty()) { cerr<<"Failure in loading image"<
             
               queryKeyPoint,trainKeyPoint; //检测surf特征 surfDetector.detect(queryImage,queryKeyPoint); surfDetector.detect(trainImage,trainKeyPoint); //查看检测到的特征点的数目 cout<<"Number of queryKeyPoint:"<
              
               <
               
                 bfMatches; vector
                
                  flannMatches; //Brute Match，穷举法求最近邻 BFMatcher bfMatcher; bfMatcher.match(queryDescriptor,trainDescriptor,bfMatches); //FlannBasedMatcher，最近邻近似匹配 FlannBasedMatcher flannMatcher; flannMatcher.match(queryDescriptor,trainDescriptor,flannMatches); //对匹配点进行RANSAC过滤 vector
                 
                   ransac_BFMatches,ransac_FlannMatches; ransac_BFMatches=ransac(queryKeyPoint,trainKeyPoint,bfMatches); ransac_FlannMatches=ransac(queryKeyPoint,trainKeyPoint,flannMatches); //定义匹配图像 Mat bfMatchImage,flannMatchImage; //绘制匹配图像 //drawMatches(queryImage,queryKeyPoint,trainImage,trainKeyPoint,bfMatches,bfMatchImage); //drawMatches(queryImage,queryKeyPoint,trainImage,trainKeyPoint,flannMatches,flannMatchImage); drawMatches(queryImage,queryKeyPoint,trainImage,trainKeyPoint,ransac_BFMatches,bfMatchImage); drawMatches(queryImage,queryKeyPoint,trainImage,trainKeyPoint,ransac_FlannMatches,flannMatchImage); //显示匹配结果 imshow("BFMatch",bfMatchImage); imshow("FlannMatch",flannMatchImage); waitKey(0); return 0;}vector
                  
                    ransac(vector
                   
                     queryKeyPoint,vector
                    
                      trainKeyPoint,vector
                     
                       matches){ cout<<"ransac前："<
                      
                       <
                       
                         queryPoints(matches.size()),trainPoints(matches.size()); for(int i=0;i
                        
                          inlierMask(matches.size()); vector
                         
                           ransac_matches; H = findHomography(queryPoints,trainPoints,CV_RANSAC,3,inlierMask); for(int i=0;i
                         
                        
                       
                      
                     
                    
                   
                  
                 
                
               
              
             
            
           
          
         
        
       
      
     
    
   

SURF原理：

匹配结果：