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136 lines
3.7 KiB
C++
136 lines
3.7 KiB
C++
/***********************************************************************
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* Software License Agreement (BSD License)
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*
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* Copyright 2008-2009 Marius Muja (mariusm@cs.ubc.ca). All rights reserved.
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* Copyright 2008-2009 David G. Lowe (lowe@cs.ubc.ca). All rights reserved.
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*
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* THE BSD LICENSE
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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
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*************************************************************************/
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#ifndef OPENCV_FLANN_LINEAR_INDEX_H_
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#define OPENCV_FLANN_LINEAR_INDEX_H_
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//! @cond IGNORED
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#include "nn_index.h"
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namespace cvflann
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{
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struct LinearIndexParams : public IndexParams
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{
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LinearIndexParams()
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{
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(* this)["algorithm"] = FLANN_INDEX_LINEAR;
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}
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};
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template <typename Distance>
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class LinearIndex : public NNIndex<Distance>
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{
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public:
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typedef typename Distance::ElementType ElementType;
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typedef typename Distance::ResultType DistanceType;
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LinearIndex(const Matrix<ElementType>& inputData, const IndexParams& params = LinearIndexParams(),
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Distance d = Distance()) :
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dataset_(inputData), index_params_(params), distance_(d)
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{
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}
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LinearIndex(const LinearIndex&);
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LinearIndex& operator=(const LinearIndex&);
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flann_algorithm_t getType() const CV_OVERRIDE
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{
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return FLANN_INDEX_LINEAR;
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}
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size_t size() const CV_OVERRIDE
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{
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return dataset_.rows;
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}
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size_t veclen() const CV_OVERRIDE
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{
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return dataset_.cols;
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}
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int usedMemory() const CV_OVERRIDE
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{
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return 0;
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}
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void buildIndex() CV_OVERRIDE
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{
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/* nothing to do here for linear search */
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}
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void saveIndex(FILE*) CV_OVERRIDE
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{
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/* nothing to do here for linear search */
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}
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void loadIndex(FILE*) CV_OVERRIDE
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{
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/* nothing to do here for linear search */
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index_params_["algorithm"] = getType();
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}
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void findNeighbors(ResultSet<DistanceType>& resultSet, const ElementType* vec, const SearchParams& /*searchParams*/) CV_OVERRIDE
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{
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ElementType* data = dataset_.data;
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for (size_t i = 0; i < dataset_.rows; ++i, data += dataset_.cols) {
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DistanceType dist = distance_(data, vec, dataset_.cols);
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resultSet.addPoint(dist, (int)i);
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}
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}
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IndexParams getParameters() const CV_OVERRIDE
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{
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return index_params_;
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}
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private:
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/** The dataset */
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const Matrix<ElementType> dataset_;
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/** Index parameters */
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IndexParams index_params_;
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/** Index distance */
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Distance distance_;
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};
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}
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//! @endcond
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#endif // OPENCV_FLANN_LINEAR_INDEX_H_
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