casacore::LatticeAddNoise Class Reference

Add noise from specified distribution to a lattice. More...

#include <LatticeAddNoise.h>

Public Member Functions
	LatticeAddNoise ()
	Default constructor. More...
	LatticeAddNoise (Random::Types type, const Vector< Double > &parameters, Int seed1=0, Int seed2=1)
	Constructor. More...
	LatticeAddNoise (const LatticeAddNoise &other)
	Copy constructor (copy semantics) More...
LatticeAddNoise &	operator= (const LatticeAddNoise &other)
	Assignment (copy semantics) More...
	~LatticeAddNoise ()
	Destructor. More...
void	set (Random::Types type, const Vector< Double > &parameters)
	Set a new distribution. More...
template<class T >
void	add (Lattice< T > &lattice)
	Add noise of given type to lattice. More...
template<class T >
void	add (MaskedLattice< T > &lattice)

Private Member Functions
void	addNoiseToArray (Array< Float > &data)
	Add noise to array. More...
void	addNoiseToArray (Array< Complex > &data)
void	addNoiseToArray (Array< Double > &data)
void	addNoiseToArray (Array< DComplex > &data)
void	makeDistribution ()
	Make noise generator. More...

Private Attributes
Random::Types	itsType
Vector< Double >	itsParameters
MLCG	itsGen
Random *	itsNoise

Detailed Description

Add noise from specified distribution to a lattice.

Intended use:

Public interface

Review Status

Date Reviewed:

yyyy/mm/dd

Prerequisite

• Lattice
• Random

Synopsis

This class allows you to add noise from one of many enumerated types to a Lattice. If the Lattice is Complex, then the noise is added to real and imaginary separately.

Example

Vector<Double> pars(2):
pars(0) = 0.5;          // Mean
pars(1) = 0.2;          // Variance
LatticeAddNoise lan(Random::NORMAL, pars);
ArrayLattice<Float> lat(IPosition(2,100,100));
lan.add(lat);

Definition at line 82 of file LatticeAddNoise.h.

Constructor & Destructor Documentation

casacore::LatticeAddNoise::LatticeAddNoise

(

)

Default constructor.

casacore::LatticeAddNoise::LatticeAddNoise	(	Random::Types	type,
		const Vector< Double > &	parameters,
		Int	seed1 = 0,
		Int	seed2 = 1
	)

Constructor.

An exception will occur if we cannot generate the distribution (e.g. illegal parameters). seed1 and seed2 are used to seed the MLCG object.

casacore::LatticeAddNoise::LatticeAddNoise

(

const LatticeAddNoise &

other

)

Copy constructor (copy semantics)

casacore::LatticeAddNoise::~LatticeAddNoise

(

)

Destructor.

Member Function Documentation

template<class T >

void casacore::LatticeAddNoise::add

(

Lattice< T > &

lattice

)

Add noise of given type to lattice.

For complex types, the noise is added to real and imaginary separately. Any mask is ignored when adding the noise. I.e. noise is added to masked pixels.

template<class T >

void casacore::LatticeAddNoise::add

(

MaskedLattice< T > &

lattice

)

void casacore::LatticeAddNoise::addNoiseToArray ( Array< Float > &  data )

private

Add noise to array.

For Complex, noise is added to real and imaginary separately.

void casacore::LatticeAddNoise::addNoiseToArray ( Array< Complex > &  data )

private

void casacore::LatticeAddNoise::addNoiseToArray ( Array< Double > &  data )

private

void casacore::LatticeAddNoise::addNoiseToArray ( Array< DComplex > &  data )

private

void casacore::LatticeAddNoise::makeDistribution ( )

private

Make noise generator.

LatticeAddNoise& casacore::LatticeAddNoise::operator=

(

const LatticeAddNoise &

other

)

Assignment (copy semantics)

void casacore::LatticeAddNoise::set	(	Random::Types	type,
		const Vector< Double > &	parameters
	)

Set a new distribution.

An exception will occur if we cannot generate the distribution (e.g. illegal parameters).

Member Data Documentation

MLCG casacore::LatticeAddNoise::itsGen

private

Definition at line 123 of file LatticeAddNoise.h.

Random* casacore::LatticeAddNoise::itsNoise

private

Definition at line 124 of file LatticeAddNoise.h.

Vector<Double> casacore::LatticeAddNoise::itsParameters

private

Definition at line 122 of file LatticeAddNoise.h.

Random::Types casacore::LatticeAddNoise::itsType

private

Definition at line 121 of file LatticeAddNoise.h.

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

• casa/casacore/lattices/LatticeMath/LatticeAddNoise.h