本文共 1292 字，大约阅读时间需要 4 分钟。

FREAK特征原理：

/* *@function FREAK_Detect.cpp *@brief 使用FREAK特征检测并匹配目标 *@author ltc *@date 19:31 Thursday，December 3rd，2015*/#include
   
    #include
    
     #include
     
      #include
      
       #include
       
        #include
        
         using namespace std;using namespace cv;int main(int argc,char* argv[]){ Mat queryImage,trainImage; queryImage=imread("1.jpg",IMREAD_COLOR); trainImage=imread("2.jpg",IMREAD_COLOR); if(queryImage.empty() || trainImage.empty()) { return -1; } vector
         
           queryKeyPoint,trainKeyPoint; Mat queryDescriptor,trainDescriptor; SurfFeatureDetector freakDetector; freakDetector.detect(trainImage,trainKeyPoint); freakDetector.detect(queryImage,queryKeyPoint); FREAK freakDescriptorExactor; freakDetector.compute(queryImage,queryKeyPoint,queryDescriptor); freakDetector.compute(trainImage,trainKeyPoint,trainDescriptor); drawKeypoints(queryImage,queryKeyPoint,queryImage); drawKeypoints(trainImage,trainKeyPoint,trainImage); imshow("query",queryImage); imshow("train",trainImage); vector
          
            matches; BFMatcher matcher(NORM_L2); matcher.match(queryDescriptor,trainDescriptor,matches); Mat image_match; drawMatches(queryImage,queryKeyPoint,trainImage,trainKeyPoint,matches,image_match); imshow("image_match",image_match); waitKey(0); return 0;}