OpenCV contrib

验证OpenCV contrib 的代码

#include "opencv2/opencv.hpp"  
#include"opencv2/xfeatures2d.hpp"
using namespace cv;
using namespace std;

int main() 
{
	Mat img = imread("E:/lena5122.bmp", 0);
	if (img.empty())
	{
		cout << " no pic" << endl;
		return 0;
	}
	Ptr<Feature2D> sift = xfeatures2d::SIFT::create();
	vector<KeyPoint> keypoints;
	Mat descriptors;

	sift->detectAndCompute(img, noArray(), keypoints, descriptors);
	drawKeypoints(img, keypoints, descriptors, Scalar(0, 255, 255));
	imshow("Result", descriptors);
	waitKey(0);
	return 0;
}