casa::MomentCalcBase< T > Class Template Reference

Abstract base class for moment calculator classes. More...

#include <MomentCalcBase.h>

Inheritance diagram for casa::MomentCalcBase< T >:

Public Types
using	AccumType = typename casacore::NumericTraits< T >::PrecisionType
using	DataIterator = typename casacore::Vector< T >::const_iterator
using	MaskIterator = casacore::Vector< casacore::Bool >::const_iterator

Public Member Functions
virtual	~MomentCalcBase ()
virtual casacore::uInt	nFailedFits () const
	Returns the number of failed fits if doing fitting. More...
Public Member Functions inherited from casacore::LineCollapser< T, T >
virtual	~LineCollapser ()
	Destructor. More...
virtual Bool	canHandleNullMask () const
	Can the process function in the derived class handle a null mask? If not, LatticeApply ensures that it'll always pass a filled mask vector, even if the lattice does not have a mask (in that case that mask contains all True values). More...
virtual void	process (T &result, Bool &resultMask, const Vector< T > &line, const Vector< Bool > &mask, const IPosition &pos)=0
	Collapse the given line and return one value from that operation. More...
virtual void	multiProcess (Vector< T > &result, Vector< Bool > &resultMask, const Vector< T > &line, const Vector< Bool > &mask, const IPosition &pos)=0
	Collapse the given line and return a line of values from that operation. More...

Protected Member Functions
void	accumSums (typename casacore::NumericTraits< T >::PrecisionType &s0, typename casacore::NumericTraits< T >::PrecisionType &s0Sq, typename casacore::NumericTraits< T >::PrecisionType &s1, typename casacore::NumericTraits< T >::PrecisionType &s2, casacore::Int &iMin, casacore::Int &iMax, T &dMin, T &dMax, casacore::Int i, T datum, casacore::Double coord) const
	Accumulate statistical sums from a vector. More...
casacore::uInt	allNoise (T &dMean, const casacore::Vector< T > &data, const casacore::Vector< casacore::Bool > &mask, T peakSNR, T stdDeviation) const
	Determine if the spectrum is pure noise. More...
void	constructorCheck (casacore::Vector< T > &calcMoments, casacore::Vector< casacore::Bool > &calcMomentsMask, const casacore::Vector< casacore::Int > &selectMoments, casacore::uInt nLatticeOut) const
	Check validity of constructor inputs. More...
void	costlyMoments (MomentsBase< T > &iMom, casacore::Bool &doMedianI, casacore::Bool &doMedianV, casacore::Bool &doAbsDev) const
	Find out from the selectMoments array whether we want to compute the more expensive moments. More...
void	doCoordCalc (casacore::Bool &doCoordProfile, casacore::Bool &doCoordRandom, const MomentsBase< T > &iMom) const
	Return the casacore::Bool saying whether we need to compute coordinates or not for the requested moments. More...
casacore::Bool	doFit (const MomentsBase< T > &iMom) const
	Return the casacore::Bool from the ImageMoments or MSMoments object saying whether we are going to fit Gaussians to the profiles or not. More...
casacore::Bool	findNextDatum (casacore::uInt &iFound, const casacore::uInt &n, const casacore::Vector< casacore::Bool > &mask, const casacore::uInt &iStart, const casacore::Bool &findGood) const
	Find the next masked or unmasked point in a vector. More...
casacore::Bool	fitGaussian (casacore::uInt &nFailed, T &peak, T &pos, T &width, T &level, const casacore::Vector< T > &x, const casacore::Vector< T > &y, const casacore::Vector< casacore::Bool > &mask, T peakGuess, T posGuess, T widthGuess, T levelGuess) const
	Fit a Gaussian to x and y arrays given guesses for the gaussian parameters. More...
casacore::Bool	getAutoGaussianFit (casacore::uInt &nFailed, casacore::Vector< T > &gaussPars, const casacore::Vector< T > &x, const casacore::Vector< T > &y, const casacore::Vector< casacore::Bool > &mask, T peakSNR, T stdDeviation) const
	Automatically fit a Gaussian to a spectrum, including finding the starting guesses. More...
casacore::Bool	getAutoGaussianGuess (T &peakGuess, T &posGuess, T &widthGuess, T &levelGuess, const casacore::Vector< T > &x, const casacore::Vector< T > &y, const casacore::Vector< casacore::Bool > &mask) const
	Automatically work out a guess for the Gaussian parameters Returns false if all pixels masked. More...
casacore::Double	getMomentCoord (const MomentsBase< T > &iMom, casacore::Vector< casacore::Double > &pixelIn, casacore::Vector< casacore::Double > &worldOut, casacore::Double momentPixel, casacore::Bool asVelocity=false) const
	Compute the world coordinate for the given moment axis pixel. More...
void	lineSegments (casacore::uInt &nSeg, casacore::Vector< casacore::uInt > &start, casacore::Vector< casacore::uInt > &nPts, const casacore::Vector< casacore::Bool > &mask) const
	Examine a mask and determine how many segments of unmasked points it consists of. More...
casacore::Int &	momentAxis (MomentsBase< T > &iMom) const
	Return the moment axis from the ImageMoments object. More...
casacore::String	momentAxisName (const casacore::CoordinateSystem &, const MomentsBase< T > &iMom) const
	Return the name of the moment/profile axis. More...
T &	peakSNR (MomentsBase< T > &iMom) const
	Return the peak SNR for determination of all noise spectra from the ImageMoments or MSMoments object. More...
void	selectRange (casacore::Vector< T > &pixelRange, casacore::Bool &doInclude, casacore::Bool &doExlude, MomentsBase< T > &iMom) const
	Return the selected pixel intensity range from the ImageMoments or MSMoments object and the Bools describing whether it is inclusion or exclusion. More...
casacore::Vector< casacore::Int >	selectMoments (MomentsBase< T > &iMom) const
	The MomentCalculators compute a vector of all possible moments. More...
void	setCalcMoments (const MomentsBase< T > &iMom, casacore::Vector< T > &calcMoments, casacore::Vector< casacore::Bool > &calcMomentsMask, casacore::Vector< casacore::Double > &pixelIn, casacore::Vector< casacore::Double > &worldOut, casacore::Bool doCoord, casacore::Double integratedScaleFactor, T dMedian, T vMedian, casacore::Int nPts, typename casacore::NumericTraits< T >::PrecisionType s0, typename casacore::NumericTraits< T >::PrecisionType s1, typename casacore::NumericTraits< T >::PrecisionType s2, typename casacore::NumericTraits< T >::PrecisionType s0Sq, typename casacore::NumericTraits< T >::PrecisionType sumAbsDev, T dMin, T dMax, casacore::Int iMin, casacore::Int iMax) const
	Fill the ouput moments array. More...
void	setPosLabel (casacore::String &title, const casacore::IPosition &pos) const
	Fill a string with the position of the cursor. More...
void	setCoordinateSystem (casacore::CoordinateSystem &cSys, MomentsBase< T > &iMom)
	Install casacore::CoordinateSystem and SpectralCoordinate in protected data members. More...
void	setUpCoords (const MomentsBase< T > &iMom, casacore::Vector< casacore::Double > &pixelIn, casacore::Vector< casacore::Double > &worldOut, casacore::Vector< casacore::Double > &sepWorldCoord, casacore::LogIO &os, casacore::Double &integratedScaleFactor, const casacore::CoordinateSystem &cSys, casacore::Bool doCoordProfile, casacore::Bool doCoordRandom) const
	Set up separable moment axis coordinate vector and conversion vectors if not separable. More...
T &	stdDeviation (MomentsBase< T > &iMom) const
	Return standard deviation of image from ImageMoments or MSMoments object. More...
virtual void	init (casacore::uInt nOutPixelsPerCollapse)
	Check if #pixels is indeed 1. More...

Protected Attributes
casacore::CoordinateSystem	cSys_p
	A number of private data members are kept here in the base class as they are common to the derived classes. More...
casacore::Vector< T >	calcMoments_p
	This vector is a container for all the possible moments that can be calculated. More...
casacore::Vector< casacore::Bool >	calcMomentsMask_p
casacore::Vector< casacore::Int >	selectMoments_p
	This vector tells us which elements of the calcMoments_p vector we wish to select. More...
casacore::Bool	doMedianI_p
	Although the general philosophy of these classes is to compute all the posisble moments and then select the ones we want, some of them are too expensive to calculate unless they are really wanted. More...
casacore::Bool	doMedianV_p
casacore::Bool	doAbsDev_p
casacore::Vector < casacore::Double >	pixelIn_p
	These vectors are used to transform coordinates between pixel and world. More...
casacore::Vector < casacore::Double >	worldOut_p
casacore::Bool	doCoordProfile_p
	All computations involving casacore::Coordinate conversions are relatively expensive These Bools signifies whether we need coordinate calculations or not for the full profile, and for some occaisional calculations. More...
casacore::Bool	doCoordRandom_p
casacore::Vector < casacore::Double >	sepWorldCoord_p
	This vector houses the world coordinate values for the profile if it was from a separable axis. More...
casacore::Vector< T >	abcissa_p
	This vector is used to hold the abscissa values. More...
casacore::String	momAxisType_p
	This string tells us the name of the moment axis (VELO or FREQ etc) More...
casacore::uInt	nFailed_p
	This is the number of Gaussian fits that failed. More...
casacore::Double	integratedScaleFactor_p
	This scale factor is the increment along the moment axis applied so that units for the Integrated moment are like Jy/beam.km/s (or whatever is needed for the moment axis units) For non-linear velocities (e.g. More...

Detailed Description

template<class T>
class casa::MomentCalcBase< T >

Abstract base class for moment calculator classes.

Intended use:

Public interface

Review Status

Date Reviewed:

yyyy/mm/dd

Prerequisite

• MomentsBase
• ImageMoments
• casacore::LatticeApply
• casacore::LineCollapser

Synopsis

This class, its concrete derived classes, and the classes casacore::LineCollapser, ImageMoments, MSMoments, and casacore::LatticeApply are connected as follows. casacore::LatticeApply offers functions so that the application programmer does not need to worry about how to optimally iterate through a casacore::Lattice; it deals with tiling and to a lesser extent memory. casacore::LatticeApply functions are used by offering a class object to them that has a member function with a name and signature specified by an abstract base class that casacore::LatticeApply uses and the offered class inherits from. Specifically, in this case, MomentCalcBase inherits from casacore::LineCollapser and casacore::LatticeApply uses objects and methods of this class (but does not inherit from it). This defines the functions collapse and multiProcess which operate on a vector extracted from a Lattice. The former returns one number, the latter a vector of numbers from that profile. MomentCalcBase is a base class for for moment calculation and the multiProcess functions are used to compute moments (e.g., mean, sum, sum squared, intensity weighted velocity etc).

It is actually the concrete classes derived from MomentCalcBase (call them, as a group, the MomentCalculator classes) that implement the multiProcess functions. These derived classes allow different algorithms to be written with which moments of the vector can be computed.

Now, so far, we have a casacore::LatticeApply function which iterates through Lattices, extracts vectors, and offers them up to functions implemented in the derived MomentCalculator classes to compute the moments. As well as that, we need some class to actually construct the MomentCalculator classes and to feed them to LatticeApply. This is the role of the ImageMoments or MSMoments classes. They are a high level class which takes control information from users specifying which moments they would like to calculate and how. They also provide the ancilliary masking lattice to the MomentCalculator constructors. The actual computational work is done by the MomentCalculator classes. So MomentsBase, MomentCalcBase and their derived MomentCalculator classes are really one unit; none of them are useful without the others. The separation of functionality is caused by having the casacore::LatticeApply class that knows all about optimally iterating through Lattices.

The coupling between these classes is done partly by the "friendship". MomentsBase and its inheritances grant friendship to MomentCalcBase so that the latter has access to the private data and private functions of the formers. MomentCalcBase then operates as an interface between its derived MomentCalculator classes and ImageMoments or MSMoments. It retrieves private data from these classes, and also activates private functions in these classes, on behalf of the MomentCalculator classes. The rest of the coupling is done via the constructors of the derived MomentCalculator classes.

Finally, MomentCalcBase also has a number of protected functions that are common to its derived classes (e.g. fitting, accumulating sums etc). It also has protected data that is common to all the MomentCalculator classes. This protected data is accessed directly by name rather than with interface functions as there is too much of it. Of course, since MomentCalcBase is an abstract base class, it is up to the MomentCalculator classes to give the MomentCalcBase protected data objects values.

For discussion about different moments and algorithms to compute them see the discussion in MomentsBase, ImageMoments, MSMoments and also in the derived classes documentation.

Example

Since MomentCalcBase is an abstract class, we defer code examples to the derived classes.

Motivation

We were desirous of writing functions to optimally iterate through Lattices so that the application programmer did not have to know anything about tiling or memory if possible. These are the casacore::LatticeApply functions. To incorporate MomentsBase and its inheritances into this scheme required some of it to be shifted into MomentCalcBase and its derived classes.

Tip: Note that there are is assignment operator or copy constructor; Do not use the ones the system would generate either;

To Do

• Derive more classes !

Definition at line 132 of file MomentCalcBase.h.

Member Typedef Documentation

template<class T >

using casa::MomentCalcBase< T >::AccumType = typename casacore::NumericTraits<T>::PrecisionType

Definition at line 135 of file MomentCalcBase.h.

template<class T >

using casa::MomentCalcBase< T >::DataIterator = typename casacore::Vector<T>::const_iterator

Definition at line 136 of file MomentCalcBase.h.

template<class T >

using casa::MomentCalcBase< T >::MaskIterator = casacore::Vector<casacore::Bool>::const_iterator

Definition at line 137 of file MomentCalcBase.h.

Constructor & Destructor Documentation

template<class T >

virtual casa::MomentCalcBase< T >::~MomentCalcBase ( )

virtual

Member Function Documentation

template<class T >

void casa::MomentCalcBase< T >::accumSums ( typename casacore::NumericTraits< T >::PrecisionType &  s0, typename casacore::NumericTraits< T >::PrecisionType &  s0Sq, typename casacore::NumericTraits< T >::PrecisionType &  s1, typename casacore::NumericTraits< T >::PrecisionType &  s2, casacore::Int &  iMin, casacore::Int &  iMax, T &  dMin, T &  dMax, casacore::Int  i, T  datum, casacore::Double  coord  ) const

inlineprotected

Accumulate statistical sums from a vector.

Accumulate statistical sums from this datum

casacore::Input: i Index datum Pixel value coord casacore::Coordinate value on moment axis casacore::Input/output: iMin,max index of dMin and dMax dMin,dMax minimum and maximum value Output: s0 sum (I) s0Sq sum (I*I) s1 sum (I*v) s2 sum (I*v*v)

Definition at line 202 of file MomentCalcBase.h.

template<class T >

casacore::uInt casa::MomentCalcBase< T >::allNoise ( T &  dMean, const casacore::Vector< T > &  data, const casacore::Vector< casacore::Bool > &  mask, T  peakSNR, T  stdDeviation  ) const

protected

Determine if the spectrum is pure noise.

template<class T >

void casa::MomentCalcBase< T >::constructorCheck ( casacore::Vector< T > &  calcMoments, casacore::Vector< casacore::Bool > &  calcMomentsMask, const casacore::Vector< casacore::Int > &  selectMoments, casacore::uInt  nLatticeOut  ) const

protected

Check validity of constructor inputs.

template<class T >

void casa::MomentCalcBase< T >::costlyMoments ( MomentsBase< T > &  iMom, casacore::Bool &  doMedianI, casacore::Bool &  doMedianV, casacore::Bool &  doAbsDev  ) const

protected

Find out from the selectMoments array whether we want to compute the more expensive moments.

template<class T >

void casa::MomentCalcBase< T >::doCoordCalc ( casacore::Bool &  doCoordProfile, casacore::Bool &  doCoordRandom, const MomentsBase< T > &  iMom  ) const

protected

Return the casacore::Bool saying whether we need to compute coordinates or not for the requested moments.

template<class T >

casacore::Bool casa::MomentCalcBase< T >::doFit ( const MomentsBase< T > &  iMom ) const

protected

Return the casacore::Bool from the ImageMoments or MSMoments object saying whether we are going to fit Gaussians to the profiles or not.

template<class T >

casacore::Bool casa::MomentCalcBase< T >::findNextDatum ( casacore::uInt &  iFound, const casacore::uInt &  n, const casacore::Vector< casacore::Bool > &  mask, const casacore::uInt &  iStart, const casacore::Bool &  findGood  ) const

protected

Find the next masked or unmasked point in a vector.

template<class T >

casacore::Bool casa::MomentCalcBase< T >::fitGaussian ( casacore::uInt &  nFailed, T &  peak, T &  pos, T &  width, T &  level, const casacore::Vector< T > &  x, const casacore::Vector< T > &  y, const casacore::Vector< casacore::Bool > &  mask, T  peakGuess, T  posGuess, T  widthGuess, T  levelGuess  ) const

protected

Fit a Gaussian to x and y arrays given guesses for the gaussian parameters.

template<class T >

casacore::Bool casa::MomentCalcBase< T >::getAutoGaussianFit ( casacore::uInt &  nFailed, casacore::Vector< T > &  gaussPars, const casacore::Vector< T > &  x, const casacore::Vector< T > &  y, const casacore::Vector< casacore::Bool > &  mask, T  peakSNR, T  stdDeviation  ) const

protected

Automatically fit a Gaussian to a spectrum, including finding the starting guesses.

template<class T >

casacore::Bool casa::MomentCalcBase< T >::getAutoGaussianGuess ( T &  peakGuess, T &  posGuess, T &  widthGuess, T &  levelGuess, const casacore::Vector< T > &  x, const casacore::Vector< T > &  y, const casacore::Vector< casacore::Bool > &  mask  ) const

protected

Automatically work out a guess for the Gaussian parameters Returns false if all pixels masked.

template<class T >

casacore::Double casa::MomentCalcBase< T >::getMomentCoord ( const MomentsBase< T > &  iMom, casacore::Vector< casacore::Double > &  pixelIn, casacore::Vector< casacore::Double > &  worldOut, casacore::Double  momentPixel, casacore::Bool  asVelocity = false  ) const

inlineprotected

Compute the world coordinate for the given moment axis pixel.

Find the value of the world coordinate on the moment axis for the given moment axis pixel value.

Input momentPixel is the index in the profile extracted from the data casacore::Input/output pixelIn Pixels to convert. Must all be filled in except for pixelIn(momentPixel). worldOut casacore::Vector to hold result

Should really return a casacore::Fallible as I don't check and see if the coordinate transformation fails or not

Should really check the result is true, but for speed...

Definition at line 309 of file MomentCalcBase.h.

References casa::MomentCalcBase< T >::cSys_p, casacore::SpectralCoordinate::frequencyToVelocity(), casa::MomentsBase< T >::momentAxis_p, casacore::CoordinateSystem::spectralCoordinate(), casacore::CoordinateSystem::toWorld(), and casa::MomentsBase< T >::worldMomentAxis_p.

template<class T >

virtual void casa::MomentCalcBase< T >::init ( casacore::uInt  nOutPixelsPerCollapse )

protectedvirtual

Check if #pixels is indeed 1.

Implements casacore::LineCollapser< T, T >.

template<class T >

void casa::MomentCalcBase< T >::lineSegments ( casacore::uInt &  nSeg, casacore::Vector< casacore::uInt > &  start, casacore::Vector< casacore::uInt > &  nPts, const casacore::Vector< casacore::Bool > &  mask  ) const

protected

Examine a mask and determine how many segments of unmasked points it consists of.

template<class T >

casacore::Int& casa::MomentCalcBase< T >::momentAxis ( MomentsBase< T > &  iMom ) const

protected

Return the moment axis from the ImageMoments object.

template<class T >

casacore::String casa::MomentCalcBase< T >::momentAxisName ( const casacore::CoordinateSystem &  , const MomentsBase< T > &  iMom  ) const

protected

Return the name of the moment/profile axis.

template<class T >

virtual casacore::uInt casa::MomentCalcBase< T >::nFailedFits ( ) const

inlinevirtual

Returns the number of failed fits if doing fitting.

Definition at line 142 of file MomentCalcBase.h.

References casa::MomentCalcBase< T >::nFailed_p.

template<class T >

T& casa::MomentCalcBase< T >::peakSNR ( MomentsBase< T > &  iMom ) const

protected

Return the peak SNR for determination of all noise spectra from the ImageMoments or MSMoments object.

template<class T >

casacore::Vector<casacore::Int> casa::MomentCalcBase< T >::selectMoments ( MomentsBase< T > &  iMom ) const

protected

The MomentCalculators compute a vector of all possible moments.

This function returns a vector which selects the desired moments from that "all moment" vector.

template<class T >

void casa::MomentCalcBase< T >::selectRange ( casacore::Vector< T > &  pixelRange, casacore::Bool &  doInclude, casacore::Bool &  doExlude, MomentsBase< T > &  iMom  ) const

protected

Return the selected pixel intensity range from the ImageMoments or MSMoments object and the Bools describing whether it is inclusion or exclusion.

template<class T >

void casa::MomentCalcBase< T >::setCalcMoments ( const MomentsBase< T > &  iMom, casacore::Vector< T > &  calcMoments, casacore::Vector< casacore::Bool > &  calcMomentsMask, casacore::Vector< casacore::Double > &  pixelIn, casacore::Vector< casacore::Double > &  worldOut, casacore::Bool  doCoord, casacore::Double  integratedScaleFactor, T  dMedian, T  vMedian, casacore::Int  nPts, typename casacore::NumericTraits< T >::PrecisionType  s0, typename casacore::NumericTraits< T >::PrecisionType  s1, typename casacore::NumericTraits< T >::PrecisionType  s2, typename casacore::NumericTraits< T >::PrecisionType  s0Sq, typename casacore::NumericTraits< T >::PrecisionType  sumAbsDev, T  dMin, T  dMax, casacore::Int  iMin, casacore::Int  iMax  ) const

protected

Fill the ouput moments array.

template<class T >

void casa::MomentCalcBase< T >::setCoordinateSystem ( casacore::CoordinateSystem &  cSys, MomentsBase< T > &  iMom  )

protected

Install casacore::CoordinateSystem and SpectralCoordinate in protected data members.

template<class T >

void casa::MomentCalcBase< T >::setPosLabel ( casacore::String &  title, const casacore::IPosition &  pos  ) const

protected

Fill a string with the position of the cursor.

template<class T >

void casa::MomentCalcBase< T >::setUpCoords ( const MomentsBase< T > &  iMom, casacore::Vector< casacore::Double > &  pixelIn, casacore::Vector< casacore::Double > &  worldOut, casacore::Vector< casacore::Double > &  sepWorldCoord, casacore::LogIO &  os, casacore::Double &  integratedScaleFactor, const casacore::CoordinateSystem &  cSys, casacore::Bool  doCoordProfile, casacore::Bool  doCoordRandom  ) const

protected

Set up separable moment axis coordinate vector and conversion vectors if not separable.

template<class T >

T& casa::MomentCalcBase< T >::stdDeviation ( MomentsBase< T > &  iMom ) const

protected

Return standard deviation of image from ImageMoments or MSMoments object.

Member Data Documentation

template<class T >

casacore::Vector<T> casa::MomentCalcBase< T >::abcissa_p

protected

This vector is used to hold the abscissa values.

Definition at line 186 of file MomentCalcBase.h.

template<class T >

casacore::Vector<T> casa::MomentCalcBase< T >::calcMoments_p

protected

This vector is a container for all the possible moments that can be calculated.

They are in the order given by the MomentsBase enum MomentTypes

Definition at line 156 of file MomentCalcBase.h.

template<class T >

casacore::Vector<casacore::Bool> casa::MomentCalcBase< T >::calcMomentsMask_p

protected

Definition at line 157 of file MomentCalcBase.h.

template<class T >

casacore::CoordinateSystem casa::MomentCalcBase< T >::cSys_p

protected

A number of private data members are kept here in the base class as they are common to the derived classes.

Since this class is abstract, they have to be filled by the derived classes.

CoordinateSystem

Definition at line 151 of file MomentCalcBase.h.

Referenced by casa::MomentCalcBase< T >::getMomentCoord().

template<class T >

casacore::Bool casa::MomentCalcBase< T >::doAbsDev_p

protected

Definition at line 169 of file MomentCalcBase.h.

template<class T >

casacore::Bool casa::MomentCalcBase< T >::doCoordProfile_p

protected

All computations involving casacore::Coordinate conversions are relatively expensive These Bools signifies whether we need coordinate calculations or not for the full profile, and for some occaisional calculations.

Definition at line 177 of file MomentCalcBase.h.

template<class T >

casacore::Bool casa::MomentCalcBase< T >::doCoordRandom_p

protected

Definition at line 177 of file MomentCalcBase.h.

template<class T >

casacore::Bool casa::MomentCalcBase< T >::doMedianI_p

protected

Although the general philosophy of these classes is to compute all the posisble moments and then select the ones we want, some of them are too expensive to calculate unless they are really wanted.

These are the median moments and those that require a second pass. These control Bools tell us whether we really want to compute the expensive ones.

Definition at line 169 of file MomentCalcBase.h.

template<class T >

casacore::Bool casa::MomentCalcBase< T >::doMedianV_p

protected

Definition at line 169 of file MomentCalcBase.h.

template<class T >

casacore::Double casa::MomentCalcBase< T >::integratedScaleFactor_p

protected

This scale factor is the increment along the moment axis applied so that units for the Integrated moment are like Jy/beam.km/s (or whatever is needed for the moment axis units) For non-linear velocities (e.g.

optical) this is approximate only and is computed at the reference pixel

Definition at line 199 of file MomentCalcBase.h.

template<class T >

casacore::String casa::MomentCalcBase< T >::momAxisType_p

protected

This string tells us the name of the moment axis (VELO or FREQ etc)

Definition at line 189 of file MomentCalcBase.h.

template<class T >

casacore::uInt casa::MomentCalcBase< T >::nFailed_p

protected

This is the number of Gaussian fits that failed.

Definition at line 192 of file MomentCalcBase.h.

Referenced by casa::MomentCalcBase< T >::nFailedFits().

template<class T >

casacore::Vector<casacore::Double> casa::MomentCalcBase< T >::pixelIn_p

protected

These vectors are used to transform coordinates between pixel and world.

Definition at line 172 of file MomentCalcBase.h.

template<class T >

casacore::Vector<casacore::Int> casa::MomentCalcBase< T >::selectMoments_p

protected

This vector tells us which elements of the calcMoments_p vector we wish to select.

Definition at line 161 of file MomentCalcBase.h.

template<class T >

casacore::Vector<casacore::Double> casa::MomentCalcBase< T >::sepWorldCoord_p

protected

This vector houses the world coordinate values for the profile if it was from a separable axis.

This means this vector can be pre computed just once, instead of working out the coordinates for each profile (expensive). It should only be filled if doCoordCalc_p is true

Definition at line 183 of file MomentCalcBase.h.

template<class T >

casacore::Vector<casacore::Double> casa::MomentCalcBase< T >::worldOut_p

protected

Definition at line 172 of file MomentCalcBase.h.

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

• casa/code/imageanalysis/ImageAnalysis/MomentCalcBase.h