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-/***********************************************************************
- * Software License Agreement (BSD License)
- *
- * Copyright 2008-2009 Marius Muja (mariusm@cs.ubc.ca). All rights reserved.
- * Copyright 2008-2009 David G. Lowe (lowe@cs.ubc.ca). All rights reserved.
- *
- * THE BSD LICENSE
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. 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.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
- *************************************************************************/
-
-#ifndef OPENCV_FLANN_LINEAR_INDEX_H_
-#define OPENCV_FLANN_LINEAR_INDEX_H_
-
-#include "general.h"
-#include "nn_index.h"
-
-namespace cvflann
-{
-
-struct LinearIndexParams : public IndexParams
-{
- LinearIndexParams()
- {
- (* this)["algorithm"] = FLANN_INDEX_LINEAR;
- }
-};
-
-template <typename Distance>
-class LinearIndex : public NNIndex<Distance>
-{
-public:
-
- typedef typename Distance::ElementType ElementType;
- typedef typename Distance::ResultType DistanceType;
-
-
- LinearIndex(const Matrix<ElementType>& inputData, const IndexParams& params = LinearIndexParams(),
- Distance d = Distance()) :
- dataset_(inputData), index_params_(params), distance_(d)
- {
- }
-
- LinearIndex(const LinearIndex&);
- LinearIndex& operator=(const LinearIndex&);
-
- flann_algorithm_t getType() const
- {
- return FLANN_INDEX_LINEAR;
- }
-
-
- size_t size() const
- {
- return dataset_.rows;
- }
-
- size_t veclen() const
- {
- return dataset_.cols;
- }
-
-
- int usedMemory() const
- {
- return 0;
- }
-
- /**
- * Dummy implementation for other algorithms of addable indexes after that.
- */
- void addIndex(const Matrix<ElementType>& /*wholeData*/, const Matrix<ElementType>& /*additionalData*/)
- {
- }
-
- void buildIndex()
- {
- /* nothing to do here for linear search */
- }
-
- void saveIndex(FILE*)
- {
- /* nothing to do here for linear search */
- }
-
-
- void loadIndex(FILE*)
- {
- /* nothing to do here for linear search */
-
- index_params_["algorithm"] = getType();
- }
-
- void findNeighbors(ResultSet<DistanceType>& resultSet, const ElementType* vec, const SearchParams& /*searchParams*/)
- {
- ElementType* data = dataset_.data;
- for (size_t i = 0; i < dataset_.rows; ++i, data += dataset_.cols) {
- DistanceType dist = distance_(data, vec, dataset_.cols);
- resultSet.addPoint(dist, (int)i);
- }
- }
-
- IndexParams getParameters() const
- {
- return index_params_;
- }
-
-private:
- /** The dataset */
- const Matrix<ElementType> dataset_;
- /** Index parameters */
- IndexParams index_params_;
- /** Index distance */
- Distance distance_;
-
-};
-
-}
-
-#endif // OPENCV_FLANN_LINEAR_INDEX_H_