centos 7,opencv 3.0

程式碼：

//  1）建立查詢樹 :
Point2f p1(2,3),   p2(5,4),p3(9, 6),  p4(4,7),  p5(8,1),p6(7, 2);
  vector<cv::Point2f> source;
  source.push_back(p1);
  source.push_back(p2);
  source.push_back(p3);
  source.push_back(p4);
  source.push_back(p5);
  source.push_back(p6);
   source.push_back(Point2f(1
 
,1.5));
  flann::KDTreeIndexParams indexParams(2);
  flann::Index kdtree(cv::Mat(source).reshape(1), indexParams);

//  2） 查詢 :
  vector<float> query;
  Point2f pt(0.1,1);
  query.push_back(pt.x);
  query.push_back(pt.y);
  int k = 1; //number of nearest neighbors
  vector<int> indices(k);//找到點的索引
 

  vector<float> dists(k);

  flann::SearchParams params(128);
  kdtree.knnSearch(query, indices, dists, k,params);
  cout<<indices[0]<<endl;
   cout<<indices[1]<<endl;
   cout<<indices[2]<<endl;
    cout<<indices[3]<<endl;