ITK
6.0.0
Insight Toolkit
|
#include <itkKdTree.h>
This class provides methods for k-nearest neighbor search and related data structures for a k-d tree.
An object of this class stores instance identifiers in a k-d tree that is a binary tree with children split along a dimension among k-dimensions. The dimension of the split (or partition) is determined for each nonterminal node that has two children. The split process is terminated when the node has no children (when the number of measurement vectors is less than or equal to the size set by the SetBucketSize. That is The split process is a recursive process in nature and in implementation. This implementation doesn't support dynamic insert and delete operations for the tree. Instead, we can use the KdTreeGenerator or WeightedCentroidKdTreeGenerator to generate a static KdTree object.
To search k-nearest neighbor, call the Search method with the query point in a k-d space and the number of nearest neighbors. The GetSearchResult method returns a pointer to a NearestNeighbors object with k-nearest neighbors.
Recent API changes: The static const macro to get the length of a measurement vector, 'MeasurementVectorSize' has been removed to allow the length of a measurement vector to be specified at run time. Please use the function GetMeasurementVectorSize() instead.
Definition at line 527 of file itkKdTree.h.
Classes | |
class | NearestNeighbors |
Public Types | |
using | AbsoluteFrequencyType = typename TSample::AbsoluteFrequencyType |
using | ConstIterator = typename TSample::ConstIterator |
using | ConstPointer = SmartPointer< const Self > |
using | DistanceMetricType = EuclideanDistanceMetric< MeasurementVectorType > |
using | InstanceIdentifier = typename TSample::InstanceIdentifier |
using | InstanceIdentifierVectorType = std::vector< InstanceIdentifier > |
using | Iterator = typename TSample::Iterator |
using | KdTreeNodeType = KdTreeNode< TSample > |
using | MeasurementType = typename TSample::MeasurementType |
using | MeasurementVectorSizeType = unsigned int |
using | MeasurementVectorType = typename TSample::MeasurementVectorType |
using | NeighborType = std::pair< InstanceIdentifier, double > |
using | Pointer = SmartPointer< Self > |
using | SampleType = TSample |
using | Self = KdTree |
using | Superclass = Object |
Public Types inherited from itk::Object | |
using | ConstPointer = SmartPointer< const Self > |
using | Pointer = SmartPointer< Self > |
using | Self = Object |
using | Superclass = LightObject |
Public Types inherited from itk::LightObject | |
using | ConstPointer = SmartPointer< const Self > |
using | Pointer = SmartPointer< Self > |
using | Self = LightObject |
Public Member Functions | |
bool | BallWithinBounds (const MeasurementVectorType &, MeasurementVectorType &, MeasurementVectorType &, double) const |
bool | BoundsOverlapBall (const MeasurementVectorType &, MeasurementVectorType &, MeasurementVectorType &, double) const |
void | DeleteNode (KdTreeNodeType *) |
DistanceMetricType * | GetDistanceMetric () |
KdTreeNodeType * | GetEmptyTerminalNode () |
AbsoluteFrequencyType | GetFrequency (InstanceIdentifier id) const |
const MeasurementVectorType & | GetMeasurementVector (InstanceIdentifier id) const |
virtual MeasurementVectorSizeType | GetMeasurementVectorSize () const |
const char * | GetNameOfClass () const override |
KdTreeNodeType * | GetRoot () |
const TSample * | GetSample () const |
void | PlotTree (KdTreeNodeType *node, std::ostream &os=std::cout) const |
void | PlotTree (std::ostream &os) const |
void | PrintTree (KdTreeNodeType *, unsigned int, unsigned int, std::ostream &os=std::cout) const |
void | PrintTree (std::ostream &) const |
void | Search (const MeasurementVectorType &, double, InstanceIdentifierVectorType &) const |
void | Search (const MeasurementVectorType &, unsigned int, InstanceIdentifierVectorType &) const |
void | Search (const MeasurementVectorType &, unsigned int, InstanceIdentifierVectorType &, std::vector< double > &) const |
void | SetBucketSize (unsigned int) |
void | SetSample (const TSample *) |
SizeValueType | Size () const |
void | SetRoot (KdTreeNodeType *root) |
Public Member Functions inherited from itk::Object | |
unsigned long | AddObserver (const EventObject &event, Command *cmd) const |
unsigned long | AddObserver (const EventObject &event, std::function< void(const EventObject &)> function) const |
LightObject::Pointer | CreateAnother () const override |
virtual void | DebugOff () const |
virtual void | DebugOn () const |
Command * | GetCommand (unsigned long tag) |
bool | GetDebug () const |
MetaDataDictionary & | GetMetaDataDictionary () |
const MetaDataDictionary & | GetMetaDataDictionary () const |
virtual ModifiedTimeType | GetMTime () const |
const char * | GetNameOfClass () const override |
virtual const TimeStamp & | GetTimeStamp () const |
bool | HasObserver (const EventObject &event) const |
void | InvokeEvent (const EventObject &) |
void | InvokeEvent (const EventObject &) const |
virtual void | Modified () const |
void | Register () const override |
void | RemoveAllObservers () |
void | RemoveObserver (unsigned long tag) const |
void | SetDebug (bool debugFlag) const |
void | SetReferenceCount (int) override |
void | UnRegister () const noexcept override |
void | SetMetaDataDictionary (const MetaDataDictionary &rhs) |
void | SetMetaDataDictionary (MetaDataDictionary &&rrhs) |
virtual void | SetObjectName (std::string _arg) |
virtual const std::string & | GetObjectName () const |
Public Member Functions inherited from itk::LightObject | |
Pointer | Clone () const |
virtual Pointer | CreateAnother () const |
virtual void | Delete () |
virtual const char * | GetNameOfClass () const |
virtual int | GetReferenceCount () const |
void | Print (std::ostream &os, Indent indent=0) const |
virtual void | Register () const |
virtual void | SetReferenceCount (int) |
virtual void | UnRegister () const noexcept |
Static Public Member Functions | |
static Pointer | New () |
Static Public Member Functions inherited from itk::Object | |
static bool | GetGlobalWarningDisplay () |
static void | GlobalWarningDisplayOff () |
static void | GlobalWarningDisplayOn () |
static Pointer | New () |
static void | SetGlobalWarningDisplay (bool val) |
Static Public Member Functions inherited from itk::LightObject | |
static void | BreakOnError () |
static Pointer | New () |
Protected Member Functions | |
KdTree () | |
int | NearestNeighborSearchLoop (const KdTreeNodeType *, const MeasurementVectorType &, MeasurementVectorType &, MeasurementVectorType &, NearestNeighbors &) const |
void | PrintSelf (std::ostream &os, Indent indent) const override |
int | SearchLoop (const KdTreeNodeType *, const MeasurementVectorType &, double, MeasurementVectorType &, MeasurementVectorType &, InstanceIdentifierVectorType &) const |
~KdTree () override | |
Protected Member Functions inherited from itk::Object | |
Object () | |
bool | PrintObservers (std::ostream &os, Indent indent) const |
void | PrintSelf (std::ostream &os, Indent indent) const override |
virtual void | SetTimeStamp (const TimeStamp &timeStamp) |
~Object () override | |
Protected Member Functions inherited from itk::LightObject | |
virtual LightObject::Pointer | InternalClone () const |
LightObject () | |
virtual void | PrintHeader (std::ostream &os, Indent indent) const |
virtual void | PrintSelf (std::ostream &os, Indent indent) const |
virtual void | PrintTrailer (std::ostream &os, Indent indent) const |
virtual | ~LightObject () |
Private Attributes | |
int | m_BucketSize {} |
DistanceMetricType::Pointer | m_DistanceMetric {} |
KdTreeNodeType * | m_EmptyTerminalNode {} |
MeasurementVectorSizeType | m_MeasurementVectorSize {} |
KdTreeNodeType * | m_Root {} |
const TSample * | m_Sample {} |
Additional Inherited Members | |
Protected Attributes inherited from itk::LightObject | |
std::atomic< int > | m_ReferenceCount {} |
using itk::Statistics::KdTree< TSample >::AbsoluteFrequencyType = typename TSample::AbsoluteFrequencyType |
Definition at line 549 of file itkKdTree.h.
using itk::Statistics::KdTree< TSample >::ConstIterator = typename TSample::ConstIterator |
Definition at line 789 of file itkKdTree.h.
using itk::Statistics::KdTree< TSample >::ConstPointer = SmartPointer<const Self> |
Definition at line 536 of file itkKdTree.h.
using itk::Statistics::KdTree< TSample >::DistanceMetricType = EuclideanDistanceMetric<MeasurementVectorType> |
DistanceMetric type for the distance calculation and comparison
Definition at line 558 of file itkKdTree.h.
using itk::Statistics::KdTree< TSample >::InstanceIdentifier = typename TSample::InstanceIdentifier |
Definition at line 548 of file itkKdTree.h.
using itk::Statistics::KdTree< TSample >::InstanceIdentifierVectorType = std::vector<InstanceIdentifier> |
Definition at line 568 of file itkKdTree.h.
using itk::Statistics::KdTree< TSample >::Iterator = typename TSample::Iterator |
Definition at line 788 of file itkKdTree.h.
using itk::Statistics::KdTree< TSample >::KdTreeNodeType = KdTreeNode<TSample> |
Node type of the KdTree
Definition at line 561 of file itkKdTree.h.
using itk::Statistics::KdTree< TSample >::MeasurementType = typename TSample::MeasurementType |
Definition at line 547 of file itkKdTree.h.
using itk::Statistics::KdTree< TSample >::MeasurementVectorSizeType = unsigned int |
Definition at line 551 of file itkKdTree.h.
using itk::Statistics::KdTree< TSample >::MeasurementVectorType = typename TSample::MeasurementVectorType |
Definition at line 546 of file itkKdTree.h.
using itk::Statistics::KdTree< TSample >::NeighborType = std::pair<InstanceIdentifier, double> |
Neighbor type. The first element of the std::pair is the instance identifier and the second one is the distance between the measurement vector identified by the first element and the query point.
Definition at line 566 of file itkKdTree.h.
using itk::Statistics::KdTree< TSample >::Pointer = SmartPointer<Self> |
Definition at line 535 of file itkKdTree.h.
using itk::Statistics::KdTree< TSample >::SampleType = TSample |
type alias alias for the source data container
Definition at line 545 of file itkKdTree.h.
using itk::Statistics::KdTree< TSample >::Self = KdTree |
Standard class type aliases
Definition at line 533 of file itkKdTree.h.
using itk::Statistics::KdTree< TSample >::Superclass = Object |
Definition at line 534 of file itkKdTree.h.
|
protected |
Constructor
|
overrideprotected |
Destructor: deletes the root node and the empty terminal node.
bool itk::Statistics::KdTree< TSample >::BallWithinBounds | ( | const MeasurementVectorType & | , |
MeasurementVectorType & | , | ||
MeasurementVectorType & | , | ||
double | |||
) | const |
Returns true if the intermediate k-nearest neighbors exist within the bounding box defined by the lowerBound and the upperBound. Otherwise returns false. Returns false if the ball defined by the distance between the query point and the farthest neighbor touch the surface of the bounding box.
bool itk::Statistics::KdTree< TSample >::BoundsOverlapBall | ( | const MeasurementVectorType & | , |
MeasurementVectorType & | , | ||
MeasurementVectorType & | , | ||
double | |||
) | const |
Returns true if the ball defined by the distance between the query point and the farthest neighbor overlaps with the bounding box defined by the lower and the upper bounds.
void itk::Statistics::KdTree< TSample >::DeleteNode | ( | KdTreeNodeType * | ) |
Deletes the node recursively
|
inline |
Get the pointer to the distance metric.
Definition at line 734 of file itkKdTree.h.
|
inline |
Returns the pointer to the empty terminal node. A KdTree object has a single empty terminal node in memory. when the split process has to create an empty terminal node, the single instance is reused for this case
Definition at line 691 of file itkKdTree.h.
|
inline |
Returns the frequency of the measurement vector identified by the instance identifier
Definition at line 727 of file itkKdTree.h.
|
inline |
Returns the measurement vector identified by the instance identifier that is an identifier defined for the input sample
Definition at line 719 of file itkKdTree.h.
|
virtual |
Get Macro to get the length of a measurement vector in the KdTree. The length is obtained from the input sample.
|
overridevirtual |
Reimplemented from itk::Object.
|
inline |
Returns the pointer to the root node.
Definition at line 711 of file itkKdTree.h.
|
inline |
Returns the pointer to the input sample
Definition at line 675 of file itkKdTree.h.
|
protected |
search loop
|
static |
Method for creation through the object factory.
void itk::Statistics::KdTree< TSample >::PlotTree | ( | KdTreeNodeType * | node, |
std::ostream & | os = std::cout |
||
) | const |
Prints out the tree information
void itk::Statistics::KdTree< TSample >::PlotTree | ( | std::ostream & | os | ) | const |
Draw out the tree information to a ostream using the format of the Graphviz dot tool.
|
overrideprotectedvirtual |
Methods invoked by Print() to print information about the object including superclasses. Typically not called by the user (use Print() instead) but used in the hierarchical print process to combine the output of several classes.
Reimplemented from itk::Object.
void itk::Statistics::KdTree< TSample >::PrintTree | ( | KdTreeNodeType * | , |
unsigned int | , | ||
unsigned int | , | ||
std::ostream & | os = std::cout |
||
) | const |
Prints out the tree information
void itk::Statistics::KdTree< TSample >::PrintTree | ( | std::ostream & | ) | const |
Prints out the tree information
void itk::Statistics::KdTree< TSample >::Search | ( | const MeasurementVectorType & | , |
double | , | ||
InstanceIdentifierVectorType & | |||
) | const |
Searches the neighbors fallen into a hypersphere
void itk::Statistics::KdTree< TSample >::Search | ( | const MeasurementVectorType & | , |
unsigned int | , | ||
InstanceIdentifierVectorType & | |||
) | const |
Searches the k-nearest neighbors
void itk::Statistics::KdTree< TSample >::Search | ( | const MeasurementVectorType & | , |
unsigned int | , | ||
InstanceIdentifierVectorType & | , | ||
std::vector< double > & | |||
) | const |
Searches the k-nearest neighbors and returns the distance vector along with the distance measures.
|
protected |
search loop
void itk::Statistics::KdTree< TSample >::SetBucketSize | ( | unsigned int | ) |
Sets the number of measurement vectors that can be stored in a terminal node
|
inline |
Sets the root node of the KdTree that is a result of KdTreeGenerator or WeightedCentroidKdTreeGenerator.
Definition at line 699 of file itkKdTree.h.
void itk::Statistics::KdTree< TSample >::SetSample | ( | const TSample * | ) |
Sets the input sample that provides the measurement vectors to the k-d tree
|
inline |
Definition at line 681 of file itkKdTree.h.
|
private |
Number of measurement vectors can be stored in a terminal node.
Definition at line 823 of file itkKdTree.h.
|
private |
Distance metric smart pointer
Definition at line 832 of file itkKdTree.h.
|
private |
Pointer to the empty terminal node
Definition at line 829 of file itkKdTree.h.
|
private |
Measurement vector size
Definition at line 835 of file itkKdTree.h.
|
private |
Pointer to the root node
Definition at line 826 of file itkKdTree.h.
|
private |
Pointer to the input sample
Definition at line 820 of file itkKdTree.h.