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CGAL 4.12 - Classification
List of all members | Public Member Functions
CGAL::Classification::Feature::Surface_variation Class Reference
Classification Reference » Predefined Features

#include <CGAL/Classification/Feature/Eigen.h>

Inherits from

CGAL::Classification::Feature_base.

Definition

Feature based on the eigenvalues of the covariance matrix of a local neighborhood.

Surface variation is defined, for the 3 eigenvalues \(\lambda_1 \ge \lambda_2 \ge \lambda_3 \ge 0\), as:

\[ \frac{\lambda_3}{\lambda_1 + \lambda_2 + \lambda_3} \]

Its default name is "surface_variation".

Public Member Functions

template<typename InputRange >
 Surface_variation (const InputRange &input, const Local_eigen_analysis &eigen)
 Constructs the feature. More...
 
- Public Member Functions inherited from CGAL::Classification::Feature_base
const std::string & name () const
 Returns the name of the feature (initialized to abstract_feature for Feature_base).
 
void set_name (const std::string &name)
 Changes the name of the feature.
 
virtual float value (std::size_t index)=0
 Returns the value taken by the feature for at the item for the item at position index. More...
 

Constructor & Destructor Documentation

◆ Surface_variation()

template<typename InputRange >
CGAL::Classification::Feature::Surface_variation::Surface_variation ( const InputRange &  input,
const Local_eigen_analysis &  eigen 
)

Constructs the feature.

Parameters
inputpoint range.
eigenclass with precomputed eigenvectors and eigenvalues.