SharpnessEstimator Concept Reference Definition The concept SharpnessEstimator describes an estimator that extracts the sharpness value for a surface element. Has models CGAL::Feature_graph::Image_AmbrosioTortorelli::Sharpness_estimator CGAL::Feature_graph::Surface_sharpness_estimator Types typedef unspecified_type Sharpness_number_type The type of the sharpness value. Estimator template<typename DimensionTag, typename Descriptor, typename Domain> Sharpness_number_type operator() (const Descriptor &element_descriptor, const Domain &domain) const returns the sharpness value of the surface element described by a type and a descriptor. Member Typedef Documentation Sharpness_number_type typedef unspecified_type SharpnessEstimator::Sharpness_number_type The type of the sharpness value. The sharpness value is a positive or negative number that is embeddable on the real axis. Is model of RealEmbeddable Member Function Documentation operator()() template<typename DimensionTag, typename Descriptor, typename Domain> Sharpness_number_type SharpnessEstimator::operator() ( const Descriptor & element_descriptor, const Domain & domain ) const returns the sharpness value of the surface element described by a type and a descriptor. 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 told to have 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 DimensionTaga tag that represent the element type. Can be CGAL::Dimension_tag<0>, CGAL::Dimension_tag<1> or CGAL::Dimension_tag<2> Descriptorthe type of descriptor used to identify the element to evaluate, which can be a vertex, an edge, or a facet according to the DimensionTag. If the domain is of type CGAL::Image_3, then it is a std::size_t for element with dimension 0, 1 and 2. If the domain is a model of FaceListGraph, then it is a vertex_descriptor (resp. halfedge_descriptor; face_descriptor ) for element with dimension 0 (resp. 1 ; 2). Domainthe type of the surface where the element is embedded. Can be a CGAL::Image_3, or a model of FaceListGraph that represents a surface mesh. Parameters element_descriptorthe descriptor of the element on the surface. domainthe domain that contains the elements. SharpnessEstimator Generated by 1.17.0

Definition

The concept SharpnessEstimator describes an estimator that extracts the sharpness value for a surface element.

Has models

CGAL::Feature_graph::Image_AmbrosioTortorelli::Sharpness_estimator

CGAL::Feature_graph::Surface_sharpness_estimator

Types
typedef unspecified_type	Sharpness_number_type
	The type of the sharpness value.

Estimator
template<typename DimensionTag, typename Descriptor, typename Domain>
Sharpness_number_type	operator() (const Descriptor &element_descriptor, const Domain &domain) const
	returns the sharpness value of the surface element described by a type and a descriptor.

Member Typedef Documentation

Sharpness_number_type

typedef unspecified_type SharpnessEstimator::Sharpness_number_type

The type of the sharpness value.

The sharpness value is a positive or negative number that is embeddable on the real axis.

Is model of

RealEmbeddable

Member Function Documentation

operator()()

template<typename DimensionTag, typename Descriptor, typename Domain>

Sharpness_number_type SharpnessEstimator::operator()	(	const Descriptor &	element_descriptor,
		const Domain &	domain ) const

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

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 told to have 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>
Descriptor	the type of descriptor used to identify the element to evaluate, which can be a vertex, an edge, or a facet according to the DimensionTag. If the domain is of type CGAL::Image_3, then it is a std::size_t for element with dimension 0, 1 and 2. If the domain is a model of FaceListGraph, then it is a vertex_descriptor (resp. halfedge_descriptor; face_descriptor ) for element with dimension 0 (resp. 1 ; 2).
Domain	the type of the surface where the element is embedded. Can be a CGAL::Image_3, or a model of FaceListGraph that represents a surface mesh.

Parameters

element_descriptor	the descriptor of the element on the surface.
domain	the domain that contains the elements.