OpenCV 2.42 FeatureDetector FREAK [英] OpenCV 2.42 FeatureDetector FREAK

问题描述

我想在OpenCV 2.4.2中尝试新类别 FREAK 。

I want to try the new class FREAK in OpenCV 2.4.2.

特征检测器的接口构造 FREAK ，但是，当然，它不工作。我应该如何修改我的代码以获得结果？

I tried to use common interface of feature detector to construct FREAK, but,of course, it doesn't work. How should I revise my code to get result?

#include <stdio.h>
#include <iostream>
#include <opencv\cxcore.h>
#include <opencv2\nonfree\features2d.hpp>
#include <opencv\highgui.h>
#include <opencv2\features2d\features2d.hpp>
#include <vector>

using namespace std;
using namespace cv;

int main(){
    Mat mat1;
    mat1 = imread("Testimg06.jpg",0);
    vector<KeyPoint> P1;
    Ptr<FeatureDetector> freakdes;
    Ptr<DescriptorExtractor> descriptorExtractor; 
    freakdes = FeatureDetector::create("FREAK"); 

    freakdes->detect(mat1,P1);

    Mat keypoint_img;

    drawKeypoints( mat1, P1, keypoint_img, Scalar::all(-1), DrawMatchesFlags::DEFAULT );
     imshow("Keypoints 1", keypoint_img );
    cvWaitKey(0);

}

推荐答案

FREAK描述符。

FREAK is descriptor only. There is no corresponding feature detector.

因此，您需要将其与其中一个可用的检测器组合：FAST，ORB，SIFT，SURF，MSER或使用 goodFeaturesToTrack 函数。

So you need to combine it with one of the available detectors: FAST, ORB, SIFT, SURF, MSER or use goodFeaturesToTrack function.

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