37 lines
1.0 KiB
C++
37 lines
1.0 KiB
C++
/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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// -*- c++ -*-
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#ifndef FAISS_METRIC_TYPE_H
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#define FAISS_METRIC_TYPE_H
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namespace faiss {
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/// The metric space for vector comparison for Faiss indices and algorithms.
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///
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/// Most algorithms support both inner product and L2, with the flat
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/// (brute-force) indices supporting additional metric types for vector
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/// comparison.
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enum MetricType {
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METRIC_INNER_PRODUCT = 0, ///< maximum inner product search
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METRIC_L2 = 1, ///< squared L2 search
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METRIC_L1, ///< L1 (aka cityblock)
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METRIC_Linf, ///< infinity distance
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METRIC_Lp, ///< L_p distance, p is given by a faiss::Index
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/// metric_arg
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/// some additional metrics defined in scipy.spatial.distance
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METRIC_Canberra = 20,
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METRIC_BrayCurtis,
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METRIC_JensenShannon,
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};
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}
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#endif
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