flann

Fast library for approximate nearest neighbor searching

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Fast Library for Approximate Nearest Neighbors

flann_build_indexflann_search_index

Build an approximate nearest neighbor index from a dataset$ flann_build_index input_data.txt output_index.idx

Search for nearest neighbors in a pre-built index$ flann_search_index output_index.idx query_data.txt results.txt

Build index with custom algorithm parameter$ flann_build_index --algorithm kmeans input_data.txt output_index.idx