I have
vector<cv::Point> pts
and I want to use it with FLANN I tried
cv::flann::Index tree= cv::flann::Index(cv::Mat(pts),cv::flann::KDTreeIndexParams(1));
but it doesn't work.I think I must convert pts to Mat.
How I can do this?
You should use one channel cv::Mat (see docs here: http://docs.opencv.org/modules/flann/doc/flann_fast_approximate_nearest_neighbor_search.html#flann-index)
When you use cv::Mat(pts) you get two channels matrix Kx1 with type CV_32FC2, so you should call reshape to get matrix K*2x1 with type CV_32FC.
std::vector<cv::Point2f> pts(K);
cv::flann::Index tree= cv::flann::Index(cv::Mat(pts).reshape(1),cv::flann::KDTreeIndexParams(1));
Asked: 2012-10-31 06:14:46 -0600
Seen: 4,052 times
Last updated: Oct 31 '12