SharpnessEstimator Concept Reference

Definition

The concept Sharpness_estimator describes a functor that extracts the sharpness value for a surface element.

Has models

CGAL::Feature_graph::AmbrosioTortorelli_on_image::Sharpness_functor

CGAL::Feature_graph::Sharpness_estimator::Sharpness_estimator_on_surface

Types
typedef unspecified_type	Sharpness_value_type
	The type of the sharpness value.

Functor
template<typename DimensionTag , typename Index >
Sharpness_value_type	operator() (const Index &element_index) const
	returns the sharpness value of the surface element described by a type and an index.

Member Typedef Documentation

Sharpness_value_type

typedef unspecified_type SharpnessEstimator::Sharpness_value_type

The type of the sharpness value.

It is a scalar constructible from the integer 0.

Is model of

RealEmbeddable

Member Function Documentation

operator()()

template<typename DimensionTag , typename Index >

Sharpness_value_type SharpnessEstimator::operator()

(

const Index &

element_index

)

const

returns the sharpness value of the surface element described by a type and an index.

A low sharpness value should represent a flat area, while a high value implies a sharp feature. For two sharpness values A and B, the value A is has a higher sharpness value iff B < A. Negative values represent smooth areas that should be erased in the selection step of the feature graph extraction method.

Template Parameters

DimensionTag	a tag that represent the element type. Can be CGAL::Dimension_tag<0>, CGAL::Dimension_tag<1> or CGAL::Dimension_tag<2>
Index	the type of index used to identify the element to evaluate, which can be a vertex, an edge, or a facet according to the DimesionTag.

Parameters

element_index

the index of the element to evaluate.