OpenCV: cv::HausdorffDistanceExtractor Class Reference

| OpenCV 3.4.2 Open Source Computer Vision

Public Member Functions | List of all members
cv::HausdorffDistanceExtractor Class Referenceabstract
Shape Distance and Matching

A simple Hausdorff distance measure between shapes defined by contours. More...

`#include "shape_distance.hpp"`

Inheritance diagram for cv::HausdorffDistanceExtractor:

## Public Member Functions
virtual int | getDistanceFlag () const =0
virtual float | getRankProportion () const =0
virtual void | setDistanceFlag (int distanceFlag)=0
| Set the norm used to compute the Hausdorff value between two shapes. It can be L1 or L2 norm. More...
virtual void | setRankProportion (float rankProportion)=0
| This method sets the rank proportion (or fractional value) that establish the Kth ranked value of the partial Hausdorff distance. Experimentally had been shown that 0.6 is a good value to compare shapes. More...
Public Member Functions inherited from cv::ShapeDistanceExtractor
virtual float | computeDistance (InputArray contour1, InputArray contour2)=0
| Compute the shape distance between two shapes defined by its contours. More...
Public Member Functions inherited from cv::Algorithm
| Algorithm ()
virtual | ~Algorithm ()
virtual void | clear ()
| Clears the algorithm state. More...
virtual bool | empty () const
| Returns true if the Algorithm is empty (e.g. in the very beginning or after unsuccessful read. More...
virtual String | getDefaultName () const
virtual void | read (const FileNode &fn)
| Reads algorithm parameters from a file storage. More...
virtual void | save (const String &filename) const
virtual void | write (FileStorage &fs) const
| Stores algorithm parameters in a file storage. More...
void | write (const Ptr< FileStorage > &fs, const String &name=String()) const
| simplified API for language bindings This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...

## Additional Inherited Members
Static Public Member Functions inherited from cv::Algorithm
template<typename _Tp >
static Ptr< _Tp > | load (const String &filename, const String &objname=String())
| Loads algorithm from the file. More...
template<typename _Tp >
static Ptr< _Tp > | loadFromString (const String &strModel, const String &objname=String())
| Loads algorithm from a String. More...
template<typename _Tp >
static Ptr< _Tp > | read (const FileNode &fn)
| Reads algorithm from the file node. More...
Protected Member Functions inherited from cv::Algorithm
void | writeFormat (FileStorage &fs) const

## Detailed Description

A simple Hausdorff distance measure between shapes defined by contours.

according to the paper "Comparing Images using the Hausdorff distance." by D.P. Huttenlocher, G.A. Klanderman, and W.J. Rucklidge. (PAMI 1993). :

## Member Function Documentation

## ◆ getDistanceFlag()

virtual int cv::HausdorffDistanceExtractor::getDistanceFlag | ( |  | ) | const
| pure virtual

## ◆ getRankProportion()

virtual float cv::HausdorffDistanceExtractor::getRankProportion | ( |  | ) | const
| pure virtual

## ◆ setDistanceFlag()

virtual void cv::HausdorffDistanceExtractor::setDistanceFlag | ( | int | distanceFlag | ) |
| pure virtual

Set the norm used to compute the Hausdorff value between two shapes. It can be L1 or L2 norm.

Parameters

  distanceFlag | Flag indicating which norm is used to compute the Hausdorff distance (NORM_L1, NORM_L2).

## ◆ setRankProportion()

virtual void cv::HausdorffDistanceExtractor::setRankProportion | ( | float | rankProportion | ) |
| pure virtual

This method sets the rank proportion (or fractional value) that establish the Kth ranked value of the partial Hausdorff distance. Experimentally had been shown that 0.6 is a good value to compare shapes.

Parameters

  rankProportion | fractional value (between 0 and 1).

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

- shape/include/opencv2/shape/shape_distance.hpp