cvflann::LshIndex< Distance > Class Template Reference

#include "lsh_index.h"

Inheritance diagram for cvflann::LshIndex< Distance >:

Public Types
typedef Distance::ResultType	DistanceType
typedef Distance::ElementType	ElementType

Public Member Functions
	LshIndex (const Matrix< ElementType > &input_data, const IndexParams &params=LshIndexParams(), Distance d=Distance())
	LshIndex (const LshIndex &)
void	buildIndex ()
void	findNeighbors (ResultSet< DistanceType > &result, const ElementType *vec, const SearchParams &)
IndexParams	getParameters () const
flann_algorithm_t	getType () const
virtual void	knnSearch (const Matrix< ElementType > &queries, Matrix< int > &indices, Matrix< DistanceType > &dists, int knn, const SearchParams &params)
	Perform k-nearest neighbor search. More...
void	loadIndex (FILE *stream)
	Loads the index from a stream. More...
LshIndex &	operator= (const LshIndex &)
void	saveIndex (FILE *stream)
	Saves the index to a stream. More...
size_t	size () const
int	usedMemory () const
size_t	veclen () const
Public Member Functions inherited from cvflann::NNIndex< Distance >
virtual	~NNIndex ()
virtual int	radiusSearch (const Matrix< ElementType > &query, Matrix< int > &indices, Matrix< DistanceType > &dists, float radius, const SearchParams &params)
	Perform radius search. More...

Detailed Description

template<typename Distance>
class cvflann::LshIndex< Distance >

Randomized kd-tree index

Contains the k-d trees and other information for indexing a set of points for nearest-neighbor matching.

Member Typedef Documentation

DistanceType

template<typename Distance>

typedef Distance::ResultType cvflann::LshIndex< Distance >::DistanceType

ElementType

template<typename Distance>

typedef Distance::ElementType cvflann::LshIndex< Distance >::ElementType

Constructor & Destructor Documentation

LshIndex() [1/2]

template<typename Distance>

cvflann::LshIndex< Distance >::LshIndex	(	const Matrix< ElementType > &	input_data,
		const IndexParams &	params = LshIndexParams(),
		Distance	d = Distance()
	)

Constructor

Parameters

input_data	dataset with the input features
params	parameters passed to the LSH algorithm
d	the distance used

LshIndex() [2/2]

template<typename Distance>

cvflann::LshIndex< Distance >::LshIndex

(

const LshIndex< Distance > &

)

Member Function Documentation

buildIndex()

template<typename Distance>

void cvflann::LshIndex< Distance >::buildIndex ( )

virtual

Builds the index

Implements cvflann::NNIndex< Distance >.

findNeighbors()

template<typename Distance>

void cvflann::LshIndex< Distance >::findNeighbors ( ResultSet< DistanceType > &  result, const ElementType *  vec, const SearchParams &    )

virtual

Find set of nearest neighbors to vec. Their indices are stored inside the result object.

Params: result = the result object in which the indices of the nearest-neighbors are stored vec = the vector for which to search the nearest neighbors maxCheck = the maximum number of restarts (in a best-bin-first manner)

Implements cvflann::NNIndex< Distance >.

getParameters()

template<typename Distance>

IndexParams cvflann::LshIndex< Distance >::getParameters ( ) const

virtual

Returns

The index parameters

Implements cvflann::NNIndex< Distance >.

getType()

template<typename Distance>

flann_algorithm_t cvflann::LshIndex< Distance >::getType ( ) const

virtual

Returns

The index type (kdtree, kmeans,...)

Implements cvflann::NNIndex< Distance >.

knnSearch()

template<typename Distance>

virtual void cvflann::LshIndex< Distance >::knnSearch ( const Matrix< ElementType > &  queries, Matrix< int > &  indices, Matrix< DistanceType > &  dists, int  knn, const SearchParams &  params  )

virtual

Perform k-nearest neighbor search.

Parameters

[in]	queries	The query points for which to find the nearest neighbors
[out]	indices	The indices of the nearest neighbors found
[out]	dists	Distances to the nearest neighbors found
[in]	knn	Number of nearest neighbors to return
[in]	params	Search parameters

Reimplemented from cvflann::NNIndex< Distance >.

loadIndex()

template<typename Distance>

void cvflann::LshIndex< Distance >::loadIndex ( FILE *  stream )

virtual

Loads the index from a stream.

Parameters

stream

The stream from which the index is loaded

Implements cvflann::NNIndex< Distance >.

operator=()

template<typename Distance>

LshIndex& cvflann::LshIndex< Distance >::operator=

(

const LshIndex< Distance > &

)

saveIndex()

template<typename Distance>

void cvflann::LshIndex< Distance >::saveIndex ( FILE *  stream )

virtual

Saves the index to a stream.

Parameters

stream

The stream to save the index to

Implements cvflann::NNIndex< Distance >.

size()

template<typename Distance>

size_t cvflann::LshIndex< Distance >::size ( ) const

virtual

Returns size of index.

Implements cvflann::NNIndex< Distance >.

usedMemory()

template<typename Distance>

int cvflann::LshIndex< Distance >::usedMemory ( ) const

virtual

Computes the index memory usage Returns: memory used by the index

Implements cvflann::NNIndex< Distance >.

veclen()

template<typename Distance>

size_t cvflann::LshIndex< Distance >::veclen ( ) const

virtual

Returns the length of an index feature.

Implements cvflann::NNIndex< Distance >.

---

The documentation for this class was generated from the following file:

• flann/include/opencv2/flann/lsh_index.h