viennals::CompareChamfer< T, D > Class Template Reference

Calculate Chamfer distance between two level sets by comparing their zero-level-set surfaces. The Chamfer distance is a bidirectional metric that measures the average nearest-neighbor distance between two point sets. More...

#include <lsCompareChamfer.hpp>

Public Member Functions
	CompareChamfer ()
	CompareChamfer (SmartPointer< Domain< T, D > > passedLevelSetTarget, SmartPointer< Domain< T, D > > passedLevelSetSample)
void	setLevelSetTarget (SmartPointer< Domain< T, D > > passedLevelSet)
	Set the target level set.
void	setLevelSetSample (SmartPointer< Domain< T, D > > passedLevelSet)
	Set the sample level set.
void	setOutputMeshTarget (SmartPointer< Mesh< T > > passedMesh)
	Set output mesh for target surface points with distance data.
void	setOutputMeshSample (SmartPointer< Mesh< T > > passedMesh)
	Set output mesh for sample surface points with distance data.
void	apply ()
	Apply the Chamfer distance calculation.
T	getForwardDistance () const
	Get the forward distance (average distance from target to sample).
T	getBackwardDistance () const
	Get the backward distance (average distance from sample to target).
T	getChamferDistance () const
	Get the Chamfer distance (average of forward and backward).
T	getRMSChamferDistance () const
	Get the RMS Chamfer distance.
T	getMaxDistance () const
	Get the maximum nearest-neighbor distance.
unsigned	getNumTargetPoints () const
	Get the number of target surface points.
unsigned	getNumSamplePoints () const
	Get the number of sample surface points.

Detailed Description

template<class T, int D = 2>
class viennals::CompareChamfer< T, D >

Calculate Chamfer distance between two level sets by comparing their zero-level-set surfaces. The Chamfer distance is a bidirectional metric that measures the average nearest-neighbor distance between two point sets.

This class extracts the surface representations of both level sets and computes:

• Forward distance: average distance from target surface to sample surface
• Backward distance: average distance from sample surface to target surface
• Chamfer distance: average of forward and backward distances
• RMS Chamfer distance: root mean square of nearest-neighbor distances
• Maximum distance: maximum nearest-neighbor distance across both directions

The code is currently intended for 2D level sets only, where surfaces are represented as line segments.

Both level sets must have a width of at least 2 to extract surfaces. If not, they will be automatically expanded.

Note for the future: lsToDiskMesh could be used instead of lsToSurfaceMesh, which is probably more efficient but slightly less accurate.

Constructor & Destructor Documentation

CompareChamfer() [1/2]

template<class T, int D = 2>

viennals::CompareChamfer< T, D >::CompareChamfer ( )

inline

CompareChamfer() [2/2]

template<class T, int D = 2>

viennals::CompareChamfer< T, D >::CompareChamfer ( SmartPointer< Domain< T, D > > passedLevelSetTarget, SmartPointer< Domain< T, D > > passedLevelSetSample )

inline

Member Function Documentation

apply()

template<class T, int D = 2>

void viennals::CompareChamfer< T, D >::apply ( )

inline

Apply the Chamfer distance calculation.

getBackwardDistance()

template<class T, int D = 2>

T viennals::CompareChamfer< T, D >::getBackwardDistance ( ) const

inline

Get the backward distance (average distance from sample to target).

getChamferDistance()

template<class T, int D = 2>

T viennals::CompareChamfer< T, D >::getChamferDistance ( ) const

inline

Get the Chamfer distance (average of forward and backward).

getForwardDistance()

template<class T, int D = 2>

T viennals::CompareChamfer< T, D >::getForwardDistance ( ) const

inline

Get the forward distance (average distance from target to sample).

getMaxDistance()

template<class T, int D = 2>

T viennals::CompareChamfer< T, D >::getMaxDistance ( ) const

inline

Get the maximum nearest-neighbor distance.

getNumSamplePoints()

template<class T, int D = 2>

unsigned viennals::CompareChamfer< T, D >::getNumSamplePoints ( ) const

inline

Get the number of sample surface points.

getNumTargetPoints()

template<class T, int D = 2>

unsigned viennals::CompareChamfer< T, D >::getNumTargetPoints ( ) const

inline

Get the number of target surface points.

getRMSChamferDistance()

template<class T, int D = 2>

T viennals::CompareChamfer< T, D >::getRMSChamferDistance ( ) const

inline

Get the RMS Chamfer distance.

setLevelSetSample()

template<class T, int D = 2>

void viennals::CompareChamfer< T, D >::setLevelSetSample ( SmartPointer< Domain< T, D > > passedLevelSet )

inline

Set the sample level set.

setLevelSetTarget()

template<class T, int D = 2>

void viennals::CompareChamfer< T, D >::setLevelSetTarget ( SmartPointer< Domain< T, D > > passedLevelSet )

inline

Set the target level set.

setOutputMeshSample()

template<class T, int D = 2>

void viennals::CompareChamfer< T, D >::setOutputMeshSample ( SmartPointer< Mesh< T > > passedMesh )

inline

Set output mesh for sample surface points with distance data.

setOutputMeshTarget()

template<class T, int D = 2>

void viennals::CompareChamfer< T, D >::setOutputMeshTarget ( SmartPointer< Mesh< T > > passedMesh )

inline

Set output mesh for target surface points with distance data.

---

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

• include/viennals/lsCompareChamfer.hpp