A base class for fuzzy functions; also an unary functor. More...

#include <Fuzzy.h>

Inheritance diagram for Fuzzifier< T >:

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Collaboration diagram for Fuzzifier< T >:

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Public Member Functions
	Fuzzifier (const std::string &name, const std::string &description="", double scale=1.0, double bias=0.0)

bool	isInversed ()
	Updates internal variables. Should be called after modifying public members.

Public Member Functions inherited from UnaryFunctor
	UnaryFunctor (const std::string &name, const std::string &description="", double scale=1.0, double bias=0.0)

virtual double	operator() (double s) const =0

Public Member Functions inherited from Functor
void	setScale (double scale, double bias=0.0)

virtual void	updateBean () const override
	Called after setParameters()

Public Member Functions inherited from BeanLike
	BeanLike (const BeanLike &b)
	Copy constructor. Re-links `parameters` to the member variables of this (new) instance.

	BeanLike (const std::string &name, const std::string &description="")
	Constructor.

virtual const std::string &	getName () const
	Return the name of an instance.

virtual const std::string &	getDescription () const
	Return a brief description.

bool	hasParameters () const
	Tells if any parameters have been linked (registered) for this bean.

template<class F >
F	getParameter (const std::string &p) const
	Gets a single parameter.

const map_t &	getParameters () const
	Returns the parameter map (const access).

map_t &	getParameters ()
	Returns the parameter map.

template<class F >
void	setParametersFromEntries (const F &args)
	Sets several parameters at once from a sequence of key-value pairs.

void	setParameters (std::initializer_list< Variable::init_pair_t > args)
	Grants access to (if above hidden)

virtual void	setParameters (const std::string &p, char assignmentSymbol='=', char separatorSymbol=0)
	Sets comma-separated parameters in a predetermined order "a,b,c" or by specifing them "b=2".

template<class T >
void	setParameters (const std::map< std::string, T > &args)
	Set parameters.

template<class T >
void	setParameters (const SmartMap< T > &args)
	Set parameters.

void	setParameter (const std::string &p, const Castable &value)
	Sets a single parameter.

template<class T >
void	setParameter (const std::string &p, const VariableT< T > &value)

template<class F >
void	setParameter (const std::string &p, const F &value)
	Sets a single parameter.

template<class F >
void	setParameter (const std::string &p, std::initializer_list< F > value)
	Sets a single parameter.

BeanLike &	operator= (const BeanLike &b)
	Assigns the parameter values of another bean (by key) to this one's own parameters.

virtual std::ostream &	toStream (std::ostream &ostr, bool compact=true) const
	Prints the name, description and current parameter values.

Protected Member Functions
virtual void	updateScale () const

Protected Member Functions inherited from Functor
	Functor (const std::string &name, const std::string &description="", double scale=1.0, double bias=0.0)

	Functor (const Functor &fct)

Protected Member Functions inherited from BeanLike
virtual void	storeLastArguments (const std::string &p)
	Called after setParameters()

Protected Attributes
bool	INVERSE

Protected Attributes inherited from Functor
double	scale
	Relative scale, typically 1. Optional.

double	bias
	"Relative" bias, typically 0. Optional.

double	scaleFinal
	Scaling factor after encodings of src and dst images are known.

double	biasFinal
	Scaling factor after encodings of src and dst images are known.

Protected Attributes inherited from BeanLike
const std::string	name
	Name of this bean, typically also the name of the (derived) class.

const std::string	description
	Brief, human-readable description of this bean.

map_t	parameters
	Parameters (name -> linked variable), typically linked to member variables of the derived class.

Additional Inherited Members
Public Types inherited from BeanLike
typedef ReferenceMap	map_t
	Reference map type used to store this bean's parameters (name -> linked variable).

Detailed Description

template<class T>
class drain::Fuzzifier< T >

A base class for fuzzy functions; also an unary functor.

These operators can be used, for example, as template arguments for drain::Image::FunctorOp.

Template Parameters

T	- storage type

A simple linear transition from 0 to 1 .

Template Parameters

T	- input storage type
T2	- output storage type

Examples with and without physical scaling to (0.0,1.0), setting step at 50% intensity (128 and 0.5):

drainage image-gray.png --iFuzzyStep 64:192 -o fuzzyStep.png

drainage image-gray.png -R 0:1 --iFuzzyStep 0.25:0.75 -o fuzzyStep-phys.png

When changing storage type, scaling must be given explicitly (here 256, from C to S ) or physically with -R :

drainage image-gray.png -T S --iFuzzyStep 64:192 -o fuzzyStep-16bit.png

drainage image-gray.png -R 0:1 -T S --iFuzzyStep 0.25:0.5 -o fuzzyStep-16bit-phys.png

Fuzzy Step.

A smooth step function between 0.0 and 1.0. Increasing (decreasing) with positive (negative) width. Otherwise like FuzzySigmoid.

Template Parameters

T	- input storage type
T2	- output storage type

Fuzzy 'stepsoid'.

A smooth symmetric peak function that resembles the Gaussian bell curve.

Template Parameters

T	- input type (typically double)
T2	- output type (typically double)

Parameters

location	- center of the peak
width	- half-width of the peak; if negative, the peak will be upside down
scale	- multiplication in scaling (scale*x + bias); default=1.0
bias	- offset in scaling (scale*x + bias); default=0.0

The approximation applies

drainage image-gray.png        --iFuzzyBell 128,16   -o fuzzyBell.png
drainage image-gray.png -R 0:1 --iFuzzyBell 0.5,0.2  -o fuzzyBell-phys.png
drainage image-gray.png -T S   --iFuzzyBell 128,16   -o fuzzyBell-16bit.png

Fuzzy Bell.

A smooth symmetric peak function that resembles the Gaussian bell curve. Diminishes quicker than FuzzyPeak.

Template Parameters

T	- input storage type
T2	- output storage type

drainage image-gray.png        --iFuzzyBell2 128,16   -o fuzzyBell2.png
drainage image-gray.png -R 0:1 --iFuzzyBell2 0.5,0.2  -o fuzzyBell2-phys.png
drainage image-gray.png -T S   --iFuzzyBell2 128,16   -o fuzzyBell2-16bit.png

Fuzzy bell(2).

A basic triangular peak function with linear around the peak.

Template Parameters

T	- input storage type
T2	- output storage type

drainage image-gray.png        --iFuzzyTriangle 64:192,128     -o fuzzyTriangle.png
drainage image-gray.png -R 0:1 --iFuzzyTriangle 0.25:0.75,0.5  -o fuzzyTriangle-phys.png
drainage image-gray.png -T S   --iFuzzyTriangle 64:192,128     -o fuzzyTriangle-16bit.png

Fuzzy Triangle.

A function taking shape of two peaks, with a zero in the middle .

Template Parameters

T	- input storage type
T2	- output storage type

Fuzzy 'twin peaks'.

Member Function Documentation

◆ updateScale()

template<class T >

virtual void updateScale ( ) const

inlineprotectedvirtual

Reimplemented from Functor.

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

src/drain/util/Fuzzy.h

Public Member Functions

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Member Function Documentation

◆ updateScale()