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details DiffusivityFunctor Class Template Reference VIGRA

Diffusivity functor for non-linear diffusion. More...

#include "vigra/nonlineardiffusion.hxx"


Public Types

typedef Value first_argument_type
typedef Value second_argument_type
typedef NumericTraits< Value
>::RealPromote 		result_type
typedef Value value_type

Public Methods

 DiffusivityFunctor (Value const &thresh)
result_type operator() (first_argument_type const &gx, second_argument_type const &gy) const
result_type operator() (RGBValue< Value > const &gx, RGBValue< Value > const &gy) const


Detailed Description


template<class Value>
class vigra::DiffusivityFunctor< Value >

Diffusivity functor for non-linear diffusion.

This functor implements the diffusivity recommended by Weickert:

where thresh is a threshold that determines whether a specific gradient magnitude is interpreted as a significant edge (above the threshold) or as noise. It is meant to be used with nonlinearDiffusion().

Examples:

smooth.cxx.

Member Typedef Documentation


typedef Value first_argument_type

 

the functors first argument type (must be an algebraic field with exp() defined). However, the functor also works with RGBValue<first_argument_type> (this hack is necessary since Microsoft C++ doesn't support partial specialization).


typedef NumericTraits<Value>::RealPromote result_type

 

the functors result type


typedef Value second_argument_type

 

the functors second argument type (same as first). However, the functor also works with RGBValue<second_argument_type> (this hack is necessary since Microsoft C++ doesn't support partial specialization).


typedef Value value_type

 

Deprecated:
use first_argument_type, second_argument_type, result_type

Constructor & Destructor Documentation


DiffusivityFunctor (  Value const &    thresh )  [inline]

 

init functor with given edge threshold

Member Function Documentation


result_type operator() (  RGBValue< Value > const &    gx,
RGBValue< Value > const &    gy
)  const [inline]

 

calculate diffusivity from RGB arguments


result_type operator() (  first_argument_type const &    gx,
second_argument_type const &    gy
)  const [inline]

 

calculate diffusivity from scalar arguments

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

© Ullrich Köthe (koethe@informatik.uni-hamburg.de)
Cognitive Systems Group, University of Hamburg, Germany

html generated using doxygen and Python
VIGRA 1.5.0 (7 Dec 2006)