SURF、SIFT、Fast角点检测的代码(opencv)

一、SURF

#include <opencv2/core/core.hpp>

#include <opencv2/highgui/highgui.hpp>

#include <opencv2/nonfree/features2d.hpp>

using namespace cv;

int main()
{
Mat image=imread("CarType1_suv18.jpg");

vector<KeyPoint> keypoints;

 

SurfFeatureDetector surf(2500);
double t = getTickCount();//当前滴答数 
//检测SURF特征
surf.detect(image,keypoints);
//描述surf特征点
SurfDescriptorExtractor surfDesc;
Mat descriptros1,descriptros2;
surfDesc.compute(image,keypoints,descriptros1);
t = ((double)getTickCount() - t)/getTickFrequency();
   cout<<"Surf算法用时："<<t<<"秒"<<endl; 
drawKeypoints(image,keypoints,image,Scalar(255,0,0),

DrawMatchesFlags::DRAW_RICH_KEYPOINTS);

namedWindow("result");

imshow("result",image);

waitKey();

 

return 0;

}

2.Fast角点检测

#include "opencv2/core/core.hpp"
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/imgproc/imgproc.hpp"
#i