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LSH matching save and load


I'm using LSH for binary descriptor matching In order to save the processing time ; I would to perform the training step at once and save the index in a file for the next query.

How can do that ? Should I use the save/load of the FlannBasedMatcher class ? How ?

cv::Ptr<cv::flann::indexparams> indexParams = new cv::flann::LshIndexParams(20, 10, 2); FlannBasedMatcher matcher(indexParams);