I am writing a program to find duplicate videos, I am pulling frames every 500ms and using ORB to compute. I was looking at using FLANN for matching and heard about index. Reading further it says that you sacrifice accuracy, but I wonder how much. Since I am matching videos I only want 95% or higher matches of frames and will determine video matches by how many frames in common at that accuracy.
EDIT: I have been reading and see that orb is a binary descriptor and the flann matcher I was thinking of using is not for binary descriptors. Does the index even work with binary descriptors? Do I need an index or is matching binary descriptors by hamming distance fast enough not to need one?
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