FAST快速检测+SURF描述子+FlannBased匹配算法 c++实例

运行环境 VS2015+opencv2.4.9

#include "stdafx.h"
#include<vector>
#include<opencv2\opencv.hpp>
#include <opencv2/core/core.hpp> 
#include <opencv2/highgui/highgui.hpp> 
#include <opencv2/imgproc/imgproc.hpp> 
#include <opencv2/features2d/features2d.hpp>
#include <opencv2\nonfree\nonfree.hpp>
#include<iostream>

using namespace std;
using namespace cv;

int main(int argc, char* argv[])
{
	initModule_nonfree();
	Mat imgL = imread("5.jpg");
	Mat imgR = imread("6.jpg");
	Ptr<FeatureDetector> fast = FeatureDetector::create("FAST");
	vector<KeyPoint> keypointL,keypointR;
	fast->detect(imgL, keypointL);
	fast->detect(imgR, keypointR);
	Mat scrimgL,srcimgR;
	drawKeypoints(imgL, keypointL, scrimgL, Scalar::all(-1), DrawMatchesFlags::DEFAULT);
	drawKeypoints(imgR, keypointR, srcimgR, Scalar::all(-1), DrawMatchesFlags::DEFAULT);
	imshow("结果图左", scrimgL);
	imshow("结果图右", srcimgR);
	waitKey(0);
	Mat descriptorsL, descriptorsR;

	Ptr<DescriptorExtractor> de = DescriptorExtractor::create("SURF");
	
	de->compute(imgL, keypointL, descriptorsL);
	de->compute(imgR, keypointR, descriptorsR);
	Ptr<DescriptorMatcher> matcher = DescriptorMatcher::create("FlannBased");
	vector< DMatch > matches;
	matcher->match(descriptorsL, descriptorsR, matches);
	double max_dist = 0; double min_dist = 100;
	//-- Quick calculation of max and min distances between keypoints
	for (int i = 0; i < descriptorsL.rows; i++)
	{
		double dist = matches[i].distance;
		if (dist < min_dist) min_dist = dist;
		if (dist > max_dist) max_dist = dist;
	}
	//-- Draw only "good" matches (i.e. whose distance is less than 2*min_dist )
	//-- PS.- radiusMatch can also be used here.
	vector< DMatch > good_matches;

	for (int i = 0; i < descriptorsL.rows; i++)
	{
		if (matches[i].distance < 2 * min_dist)
		{
			good_matches.push_back(matches[i]);
		}
	}
	//-- Draw only "good" matches
	Mat img_matches;
	drawMatches(imgL, keypointL, imgR, keypointR,
		good_matches, img_matches, Scalar::all(-1), Scalar::all(-1),
		vector<char>(), DrawMatchesFlags::NOT_DRAW_SINGLE_POINTS);
	//-- Show detected matches
	imshow("Good Matches", img_matches);
	waitKey(0);
    return 0;
}