open3d::core::nns::NNSIndex Class Reference

#include <NNSIndex.h>

Inheritance diagram for open3d::core::nns::NNSIndex:

Public Member Functions
	NNSIndex ()
	Default Constructor.
virtual	~NNSIndex ()
	NNSIndex (const NNSIndex &)=delete
NNSIndex &	operator= (const NNSIndex &)=delete
virtual bool	SetTensorData (const Tensor &dataset_points, const Dtype &index_dtype)=0
virtual bool	SetTensorData (const Tensor &dataset_points, double radius, const Dtype &index_dtype)=0
virtual std::pair< Tensor, Tensor >	SearchKnn (const Tensor &query_points, int knn) const =0
virtual std::tuple< Tensor, Tensor, Tensor >	SearchRadius (const Tensor &query_points, const Tensor &radii, bool sort) const =0
virtual std::tuple< Tensor, Tensor, Tensor >	SearchRadius (const Tensor &query_points, double radius, bool sort) const =0
virtual std::tuple< Tensor, Tensor, Tensor >	SearchHybrid (const Tensor &query_points, double radius, int max_knn) const =0
int	GetDimension () const
size_t	GetDatasetSize () const
Dtype	GetDtype () const
Device	GetDevice () const
Dtype	GetIndexDtype () const

Protected Attributes
Tensor	dataset_points_
Dtype	index_dtype_

Constructor & Destructor Documentation

NNSIndex() [1/2]

open3d::core::nns::NNSIndex::NNSIndex ( )

inline

Default Constructor.

~NNSIndex()

virtual open3d::core::nns::NNSIndex::~NNSIndex ( )

inlinevirtual

NNSIndex() [2/2]

open3d::core::nns::NNSIndex::NNSIndex ( const NNSIndex & )

delete

Member Function Documentation

GetDatasetSize()

size_t open3d::core::nns::NNSIndex::GetDatasetSize

(

)

const

Get size of the dataset points.

Returns

number of points in dataset.

GetDevice()

Device open3d::core::nns::NNSIndex::GetDevice

(

)

const

Get device of the dataset points.

Returns

device of dataset points.

GetDimension()

int open3d::core::nns::NNSIndex::GetDimension

(

)

const

Get dimension of the dataset points.

Returns

dimension of dataset points.

GetDtype()

Dtype open3d::core::nns::NNSIndex::GetDtype

(

)

const

Get dtype of the dataset points.

Returns

dtype of dataset points.

GetIndexDtype()

Dtype open3d::core::nns::NNSIndex::GetIndexDtype

(

)

const

Get dtype of indices.

Returns

dtype of indices.

operator=()

NNSIndex & open3d::core::nns::NNSIndex::operator= ( const NNSIndex & )

delete

SearchHybrid()

virtual std::tuple< Tensor, Tensor, Tensor > open3d::core::nns::NNSIndex::SearchHybrid ( const Tensor & query_points, double radius, int max_knn ) const

pure virtual

Perform hybrid search.

Parameters

query_points	Query points. Must be 2D, with shape {n, d}.
radius	Radius.
max_knn	Maximum number of neighbor to search per query point.

Returns

Tuple of Tensors, (indices, distances, counts):

• indices: Tensor of shape {n, knn}, with dtype Int32.
• distances: Tensor of shape {n, knn}, with dtype Float32.
• counts: Tensor of shape {n, 1}, with dtype Int32.

Implemented in open3d::core::nns::FixedRadiusIndex, open3d::core::nns::KnnIndex, and open3d::core::nns::NanoFlannIndex.

SearchKnn()

virtual std::pair< Tensor, Tensor > open3d::core::nns::NNSIndex::SearchKnn ( const Tensor & query_points, int knn ) const

pure virtual

Perform K nearest neighbor search.

Parameters

query_points	Query points. Must be 2D, with shape {n, d}, same dtype with dataset_points.
knn	Number of nearest neighbor to search.

Returns

Pair of Tensors: (indices, distances):

• indices: Tensor of shape {n, knn}, with dtype Int32.
• distances: Tensor of shape {n, knn}, same dtype with dataset_points.

Implemented in open3d::core::nns::FixedRadiusIndex, open3d::core::nns::KnnIndex, and open3d::core::nns::NanoFlannIndex.

SearchRadius() [1/2]

virtual std::tuple< Tensor, Tensor, Tensor > open3d::core::nns::NNSIndex::SearchRadius ( const Tensor & query_points, const Tensor & radii, bool sort ) const

pure virtual

Perform radius search with multiple radii.

Parameters

query_points	Query points. Must be 2D, with shape {n, d}, same dtype with dataset_points.
radii	list of radius. Must be 1D, with shape {n, }.

Returns

Tuple of Tensors: (indices, distances, num_neighbors):

• indices: Tensor of shape {total_num_neighbors,}, dtype Int32.
• distances: Tensor of shape {total_num_neighbors,}, same dtype with dataset_points.
• num_neighbors: Tensor of shape {n,}, dtype Int32.

Implemented in open3d::core::nns::FixedRadiusIndex, open3d::core::nns::KnnIndex, and open3d::core::nns::NanoFlannIndex.

SearchRadius() [2/2]

virtual std::tuple< Tensor, Tensor, Tensor > open3d::core::nns::NNSIndex::SearchRadius ( const Tensor & query_points, double radius, bool sort ) const

pure virtual

Perform radius search.

Parameters

query_points	Query points. Must be 2D, with shape {n, d}, same dtype with dataset_points.
radius	Radius.

Returns

Tuple of Tensors, (indices, distances, num_neighbors):

• indices: Tensor of shape {total_num_neighbors,}, dtype Int32.
• distances: Tensor of shape {total_num_neighbors,}, same dtype with dataset_points.
• num_neighbors: Tensor of shape {n}, dtype Int32.

Implemented in open3d::core::nns::FixedRadiusIndex, open3d::core::nns::KnnIndex, and open3d::core::nns::NanoFlannIndex.

SetTensorData() [1/2]

virtual bool open3d::core::nns::NNSIndex::SetTensorData ( const Tensor & dataset_points, const Dtype & index_dtype )

pure virtual

Set the data for the nearest neighbor search.

Parameters

dataset_points

Dataset points for KDTree construction. Must be 2D, with shape {n, d}.

Returns

Returns true if the construction success, otherwise false.

Implemented in open3d::core::nns::FixedRadiusIndex, open3d::core::nns::KnnIndex, and open3d::core::nns::NanoFlannIndex.

SetTensorData() [2/2]

virtual bool open3d::core::nns::NNSIndex::SetTensorData ( const Tensor & dataset_points, double radius, const Dtype & index_dtype )

pure virtual

Set the data for the nearest neighbor search.

Parameters

dataset_points

Dataset points for KDTree construction. Must be 2D, with shape {n, d}.

Returns

Returns true if the construction success, otherwise false.

Implemented in open3d::core::nns::FixedRadiusIndex, open3d::core::nns::KnnIndex, and open3d::core::nns::NanoFlannIndex.

Field Documentation

dataset_points_

Tensor open3d::core::nns::NNSIndex::dataset_points_

protected

index_dtype_

Dtype open3d::core::nns::NNSIndex::index_dtype_

protected

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

• cpp/open3d/core/nns/NNSIndex.h
• cpp/open3d/core/nns/NNSIndex.cpp