75 lines
3.0 KiB
C++
75 lines
3.0 KiB
C++
// Ceres Solver - A fast non-linear least squares minimizer
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// Copyright 2015 Google Inc. All rights reserved.
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// http://ceres-solver.org/
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// * Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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// * Neither the name of Google Inc. nor the names of its contributors may be
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// used to endorse or promote products derived from this software without
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// specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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//
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// Author: sameeragarwal@google.com (Sameer Agarwal)
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#ifndef CERES_INTERNAL_SINGLE_LINKAGE_CLUSTERING_H_
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#define CERES_INTERNAL_SINGLE_LINKAGE_CLUSTERING_H_
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// This include must come before any #ifndef check on Ceres compile options.
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#include "ceres/internal/port.h"
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#ifndef CERES_NO_SUITESPARSE
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#include "ceres/collections_port.h"
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#include "ceres/graph.h"
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namespace ceres {
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namespace internal {
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struct SingleLinkageClusteringOptions {
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SingleLinkageClusteringOptions()
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: min_similarity(0.99) {
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}
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// Graph edges with edge weight less than min_similarity are ignored
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// during the clustering process.
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double min_similarity;
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};
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// Compute a partitioning of the vertices of the graph using the
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// single linkage clustering algorithm. Edges with weight less than
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// SingleLinkageClusteringOptions::min_similarity will be ignored.
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//
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// membership upon return will contain a mapping from the vertices of
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// the graph to an integer indicating the identity of the cluster that
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// it belongs to.
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//
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// The return value of this function is the number of clusters
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// identified by the algorithm.
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int ComputeSingleLinkageClustering(
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const SingleLinkageClusteringOptions& options,
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const WeightedGraph<int>& graph,
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HashMap<int, int>* membership);
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} // namespace internal
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} // namespace ceres
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#endif // CERES_NO_SUITESPARSE
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#endif // CERES_INTERNAL_SINGLE_LINKAGE_CLUSTERING_H_
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