Install libflann1.9 by entering the following commands in the terminal:
sudo apt update sudo apt install libflann1.9
Description:
Fast Library for Approximate Nearest Neighbors - runtime
FLANN is a library for performing fast approximate nearest neighbor searches in high dimensional spaces. It contains a collection of algorithms found to work best for nearest neighbor search and a system for automatically choosing the best algorithm and optimum parameters depending on the dataset. . This package contains the libraries needed to run FLANN applications.
Homepage: http://www.cs.ubc.ca/~mariusm/index.php/FLANN/FLANN
Version: 1.9.1+dfsg-2
Section: universe/libs