detail::FeaturesMatcher

edit

how to use detail::FeaturesMatcher ?

vector<Mat> vec_im;
    Mat im1= imread("001_001.PNG");
    Mat im2= imread("001_002.PNG");
    vec_im.push_back(im1);
    vec_im.push_back(im2);

    int64 t = getTickCount();
    Ptr<FeaturesFinder> finder;
    finder = new SurfFeaturesFinder();

    vector<ImageFeatures> vec_features;

    for(int i=0;i<vec_im.size();++i)
    {
        ImageFeatures t;
        (*finder)(vec_im[i],t);
        t.img_idx = i;
        vec_features.push_back(t);
    }
    finder->collectGarbage(); //?

    vector<CPair> vec_pairs;
    int k=0;
    for(int i=0;i<vec_features.size();++i)
    {
        ++k;
        for(int j=k;j<vec_features.size();++j)
        {
            Ptr<FeaturesMatcher> matcher;
            MatchesInfo matches;
            (*matcher)(vec_features[i],vec_features[j],matches); //don't work!
            CPair t;
            t.first= i;
            t.second= j;
            vec_pairs.push_back(t);
        }
    }