Hi, I am using the latest opencv version. I am trying to use an flann index using Locality Sensitive Hashing (LSH) index. I guess we can only use the flann in batch process. Is there a way to build the flann index incrementally ? For example, I would like to add images acquired by a robot to the flann index and query it online as well. is this possible ? Thank you -- Hemanth Korrapati, Doctoral Student, LASMEA, Universite Blaise Pascal, Campus des Cezeaux 63170 Clermont-Ferrand, France. Mobile: +33 (0)650348239 http://hemanth-k.co.in