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Diffstat (limited to 'internal/ceres/single_linkage_clustering.h')
-rw-r--r-- | internal/ceres/single_linkage_clustering.h | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/internal/ceres/single_linkage_clustering.h b/internal/ceres/single_linkage_clustering.h new file mode 100644 index 0000000..e6fdeab --- /dev/null +++ b/internal/ceres/single_linkage_clustering.h @@ -0,0 +1,74 @@ +// Ceres Solver - A fast non-linear least squares minimizer +// Copyright 2013 Google Inc. All rights reserved. +// http://code.google.com/p/ceres-solver/ +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are met: +// +// * Redistributions of source code must retain the above copyright notice, +// this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above copyright notice, +// this list of conditions and the following disclaimer in the documentation +// and/or other materials provided with the distribution. +// * Neither the name of Google Inc. nor the names of its contributors may be +// used to endorse or promote products derived from this software without +// specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" +// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE +// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR +// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF +// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS +// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN +// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) +// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE +// POSSIBILITY OF SUCH DAMAGE. +// +// Author: sameeragarwal@google.com (Sameer Agarwal) + +#ifndef CERES_INTERNAL_SINGLE_LINKAGE_CLUSTERING_H_ +#define CERES_INTERNAL_SINGLE_LINKAGE_CLUSTERING_H_ + +// This include must come before any #ifndef check on Ceres compile options. +#include "ceres/internal/port.h" + +#ifndef CERES_NO_SUITESPARSE + +#include "ceres/collections_port.h" +#include "ceres/graph.h" + +namespace ceres { +namespace internal { + +struct SingleLinkageClusteringOptions { + SingleLinkageClusteringOptions() + : min_similarity(0.99) { + } + + // Graph edges with edge weight less than min_similarity are ignored + // during the clustering process. + double min_similarity; +}; + +// Compute a partitioning of the vertices of the graph using the +// single linkage clustering algorithm. Edges with weight less than +// SingleLinkageClusteringOptions::min_similarity will be ignored. +// +// membership upon return will contain a mapping from the vertices of +// the graph to an integer indicating the identity of the cluster that +// it belongs to. +// +// The return value of this function is the number of clusters +// identified by the algorithm. +int ComputeSingleLinkageClustering( + const SingleLinkageClusteringOptions& options, + const Graph<int>& graph, + HashMap<int, int>* membership); + +} // namespace internal +} // namespace ceres + +#endif // CERES_NO_SUITESPARSE +#endif // CERES_INTERNAL_SINGLE_LINKAGE_CLUSTERING_H_ |