Miscellaneous information related to an image. More...

#include <ImageInfo.h>

Inheritance diagram for casacore::ImageInfo:

Public Types
enum	ImageTypes { Undefined, Intensity, Beam, ColumnDensity, DepolarizationRatio, KineticTemperature, MagneticField, OpticalDepth, RotationMeasure, RotationalTemperature, SpectralIndex, Velocity, VelocityDispersion, nTypes }
	This enum defines the actual quantity being held in an image It's really only used for descriptive information. More...

Public Member Functions
	ImageInfo ()
	Default constructor. More...

	~ImageInfo ()
	Destructor. More...

	ImageInfo (const ImageInfo &other)
	Copy constructor (copy semantics) More...

ImageInfo &	operator= (const ImageInfo &other)
	Assignment (copy semantics) More...

ImageInfo::ImageTypes	imageType () const
	Set and get the Image Type. More...

ImageInfo &	setImageType (ImageTypes type)

String	objectName () const
	Set and get the Image object name. More...

ImageInfo &	setObjectName (const String &object)

virtual Bool	toRecord (String &error, RecordInterface &outRecord) const
	Functions to interconvert between an ImageInfo and a record. More...

virtual Bool	fromRecord (String &error, const RecordInterface &inRecord)
	Initialise the class from a Record representation. More...

Bool	toFITS (String &error, RecordInterface &outRecord) const
	Functions to interconvert between an ImageInfo and FITS keywords (converted to a Record). More...

Bool	fromFITS (Vector< String > &error, const RecordInterface &inRecord)

GaussianBeam	restoringBeam (Int channel=-1, Int stokes=-1) const
	Set and get the beam. More...

void	setRestoringBeam (const GaussianBeam &beam)
	Set the single global restoring beam. More...

void	setRestoringBeam (const Quantum< Double > &major, const Quantum< Double > &minor, const Quantum< Double > &pa)

void	removeRestoringBeam ()
	Remove all beams (global or per plane) associated with this object. More...

const ImageBeamSet &	getBeamSet () const
	Get the beam set associated with this object. More...

void	setBeam (Int channel, Int stokes, const Quantity &major, const Quantity &minor, const Quantity &pa)
	Set the beam for a specific plane. More...

void	setBeam (Int channel, Int stokes, const GaussianBeam &beam)

Bool	hasMultipleBeams () const
	does this object contain multiple beams? More...

Bool	hasSingleBeam () const
	does this object contain a single beam More...

Bool	hasBeam () const
	Does this object contain one or more beams? More...

uInt	nChannels () const
	Number of channels and stokes in per hyper-plane beam array. More...

uInt	nStokes () const

void	setAllBeams (const uInt nChannels, const uInt nStokes, const GaussianBeam &beam)
	Initialize all per-plane beams to the same value. More...

void	setBeams (const ImageBeamSet &beams)
	Set the per plane beams array directly. More...

Bool	getRestoringBeam (LoggerHolder &logger)
	This method is not meant for common use. More...

Record	beamToRecord (Int channel, Int stokes) const
	Convert the given beam to a Record. More...

void	checkBeamSet (const CoordinateSystem &coords, const IPosition &shape, const String &imageName) const
	Check if the beam set matches the coordinate axes sizes. More...

void	appendBeams (ImageInfo &infoThat, Int axis, Bool relax, LogIO &os, const CoordinateSystem &csysThis, const CoordinateSystem &csysThat, const IPosition &shapeThis, const IPosition &shapeThat)
	Append the other beamset to this one. More...

void	combineBeams (const ImageInfo &infoThat, const IPosition &shapeThis, const IPosition &shapeThat, const CoordinateSystem &csysThis, const CoordinateSystem &csysThat, Int axis, Bool relax, LogIO &os)
	Combine beam sets for the concatenation of images and replace the beamset in this object by the result. More...

uInt	setInfoSplitBeamSet (uInt ndone, const ImageInfo &concatInfo, const IPosition &shape, const CoordinateSystem &csys, Int concatAxis)
	Reset the info and beamset of this image with the appropriate part of the beam set of the concat image it is part of. More...

void	concatFreqBeams (ImageBeamSet &beamsOut, const ImageInfo &infoThat, Int nchanThis, Int nchanThat, Bool relax, LogIO &os) const
	Concatenate the beam sets along the frequency axis. More...

void	concatPolBeams (ImageBeamSet &beamsOut, const ImageInfo &infoThat, Int npolThis, Int npolThat, Bool relax, LogIO &os) const
	Concatenate the beam sets along the stokes axis. More...

void	mergeBeams (ImageBeamSet &beamsOut, const ImageInfo &infoThat, Bool relax, LogIO &os) const
	Merge the beam sets and check if they match. More...

Double	getBeamAreaInPixels (Int channel, Int stokes, const DirectionCoordinate &) const
	Get the beam area in terms of pixel size of the specified DirectionCoordinate. More...

Public Member Functions inherited from casacore::RecordTransformable
virtual	~RecordTransformable ()
	The destructor must be virtual so that the destructor of derived classes is actually used. More...

virtual Bool	fromString (String &error, const String &inString)
	Initialise the class from a String representation. More...

virtual const String &	ident () const
	Specify the identification of the record (e.g. More...

Static Public Member Functions
static String	imageType (ImageInfo::ImageTypes type)

static ImageInfo::ImageTypes	imageType (String type)

static ImageTypes	defaultImageType ()
	In some circumstances it might be useful to know what the defaults for the various values are so you can check if they have been set. More...

static String	defaultObjectName ()

static GaussianBeam	defaultRestoringBeam ()

static ImageInfo::ImageTypes	imageTypeFromFITS (Int fitsValue)
	This function takes an unofficial fitsValue found on the Stokes axis and returns the appropriate ImageType. More...

static Vector< String >	keywordNamesFITS ()
	It might be useful to know what FITS keyword names are used in to/from FITS so we can remove them so they won't be used more than once. More...

static ImageInfo::ImageTypes	MiriadImageType (const String &type)
	Convert the Miriad 'btype' strings to the ImageType. More...

static void	logMessage (Bool &warn, LogIO &os, Bool relax, const String &msg1, const String msg2=String())
	If relax=True, give a warning message if warn=True and set to False. More...

static Double	getBeamAreaInPixels (const GaussianBeam &beam, const DirectionCoordinate &dc)

Private Member Functions
void	copy_other (const ImageInfo &other)
	Common copy ctor/assignment operator code. More...

void	_setRestoringBeam (const Record &inRecord)
	Set the restoring beam from the record. More...

void	_checkBeamShape (uInt &nchan, uInt &npol, const IPosition &shape, const CoordinateSystem &csys) const
	Check if the beam shape matches the coordinates. More...

Private Attributes
ImageBeamSet	_beams

Bool	_warnBeam

ImageTypes	itsImageType

String	itsObjectName

Detailed Description

Miscellaneous information related to an image.

Intended use:

Public interface

Review Status

Date Reviewed:: yyyy/mm/dd

Prerequisite

RecordTransformable

Synopsis

This class is used to record information about an image. At present it contains the following:

The restoring beam(s)
A parameter describing what quantity the image holds.
The image object name.

Support for per plane (eg channel) dependent beams have been added.

Example

The interface is a simple get/set interface. Note that the "set" methods can be chained together since each set method returns a reference to its object (rather like cout).

 ImageInfo ii;
 ii.setRestoringBeam(Quantity(30,"arcsec"), Quantity(10,"arcsec"),
 Quantity(-18,"deg"));
..\.
 cout << "The restoring beam is : " << oi.restoringBeam() << endl;

Motivation

This sort of information needed a standard place to go with a standard interface so it could be moved out of MiscInfo.

Definition at line 92 of file ImageInfo.h.

Member Enumeration Documentation

enum casacore::ImageInfo::ImageTypes

This enum defines the actual quantity being held in an image It's really only used for descriptive information.

Enumerator
Undefined
Intensity
Beam
ColumnDensity
DepolarizationRatio
KineticTemperature
MagneticField
OpticalDepth
RotationMeasure
RotationalTemperature
SpectralIndex
Velocity
VelocityDispersion
nTypes

Definition at line 98 of file ImageInfo.h.

Constructor & Destructor Documentation

casacore::ImageInfo::ImageInfo ( )

Default constructor.

casacore::ImageInfo::~ImageInfo ( )

Destructor.

casacore::ImageInfo::ImageInfo ( const ImageInfo & other )

Copy constructor (copy semantics)

Member Function Documentation

void casacore::ImageInfo::_checkBeamShape	(	uInt &	nchan,
		uInt &	npol,
		const IPosition &	shape,
		const CoordinateSystem &	csys
	)		const

private

Check if the beam shape matches the coordinates.

It sets nchan and npol to the values in the image shape.

void casacore::ImageInfo::_setRestoringBeam ( const Record & inRecord )

private

Set the restoring beam from the record.

void casacore::ImageInfo::appendBeams	(	ImageInfo &	infoThat,
		Int	axis,
		Bool	relax,
		LogIO &	os,
		const CoordinateSystem &	csysThis,
		const CoordinateSystem &	csysThat,
		const IPosition &	shapeThis,
		const IPosition &	shapeThat
	)

Append the other beamset to this one.

Record casacore::ImageInfo::beamToRecord	(	Int	channel,
		Int	stokes
	)		const

Convert the given beam to a Record.

void casacore::ImageInfo::checkBeamSet	(	const CoordinateSystem &	coords,
		const IPosition &	shape,
		const String &	imageName
	)		const

Check if the beam set matches the coordinate axes sizes.

void casacore::ImageInfo::combineBeams	(	const ImageInfo &	infoThat,
		const IPosition &	shapeThis,
		const IPosition &	shapeThat,
		const CoordinateSystem &	csysThis,
		const CoordinateSystem &	csysThat,
		Int	axis,
		Bool	relax,
		LogIO &	os
	)

Combine beam sets for the concatenation of images and replace the beamset in this object by the result.

If channel or stokes is the concatenation axis, that beam axis is concatenated. Otherwise it is checked if both beam sets match and are merged. If relax=False, an exception is thrown if mismatching.

void casacore::ImageInfo::concatFreqBeams	(	ImageBeamSet &	beamsOut,
		const ImageInfo &	infoThat,
		Int	nchanThis,
		Int	nchanThat,
		Bool	relax,
		LogIO &	os
	)		const

Concatenate the beam sets along the frequency axis.

void casacore::ImageInfo::concatPolBeams	(	ImageBeamSet &	beamsOut,
		const ImageInfo &	infoThat,
		Int	npolThis,
		Int	npolThat,
		Bool	relax,
		LogIO &	os
	)		const

Concatenate the beam sets along the stokes axis.

void casacore::ImageInfo::copy_other ( const ImageInfo & other )

private

Common copy ctor/assignment operator code.

static ImageTypes casacore::ImageInfo::defaultImageType ( )

static

In some circumstances it might be useful to know what the defaults for the various values are so you can check if they have been set.

The default restoring beam is a null vector.

static String casacore::ImageInfo::defaultObjectName ( )

static

static GaussianBeam casacore::ImageInfo::defaultRestoringBeam ( )

static

Bool casacore::ImageInfo::fromFITS	(	Vector< String > &	error,
		const RecordInterface &	inRecord
	)

virtual Bool casacore::ImageInfo::fromRecord	(	String &	error,
		const RecordInterface &	inRecord
	)

virtual

Initialise the class from a Record representation.

The input record should contain the fields that are required by the class. Other fields will be ignored. If the transformation succeeds then the error String is unchanged and the function returns True. Otherwise the function returns False and appends an error message to the supplied String giving the reason why the conversion failed.

Implements casacore::RecordTransformable.

Double casacore::ImageInfo::getBeamAreaInPixels	(	Int	channel,
		Int	stokes,
		const DirectionCoordinate &
	)		const

Get the beam area in terms of pixel size of the specified DirectionCoordinate.

static Double casacore::ImageInfo::getBeamAreaInPixels	(	const GaussianBeam &	beam,
		const DirectionCoordinate &	dc
	)

static

const ImageBeamSet& casacore::ImageInfo::getBeamSet ( ) const

Get the beam set associated with this object.

Bool casacore::ImageInfo::getRestoringBeam ( LoggerHolder & logger )

This method is not meant for common use.

New code should not use it. Get the restoring beam from a LoggerHolder (where the history is stored) as AIPS writes the beam in the FITS history rather than the header keywords. If there is no beam, False is returned, and the internal state of the object is unchanged.

Bool casacore::ImageInfo::hasBeam ( ) const

inline

Does this object contain one or more beams?

Definition at line 245 of file ImageInfo.h.

References _beams, and casacore::ImageBeamSet::empty().

Bool casacore::ImageInfo::hasMultipleBeams ( ) const

inline

does this object contain multiple beams?

Definition at line 237 of file ImageInfo.h.

References _beams, and casacore::ImageBeamSet::hasMultiBeam().

Bool casacore::ImageInfo::hasSingleBeam ( ) const

inline

does this object contain a single beam

Definition at line 241 of file ImageInfo.h.

References _beams, and casacore::ImageBeamSet::hasSingleBeam().

ImageInfo::ImageTypes casacore::ImageInfo::imageType ( ) const

Set and get the Image Type.

static String casacore::ImageInfo::imageType ( ImageInfo::ImageTypes type )

static

static ImageInfo::ImageTypes casacore::ImageInfo::imageType ( String type )

static

static ImageInfo::ImageTypes casacore::ImageInfo::imageTypeFromFITS ( Int fitsValue )

static

This function takes an unofficial fitsValue found on the Stokes axis and returns the appropriate ImageType.

The idea is that you detect the unofficial value, drop the Stokes axis, and store the value as an ImageType in ImageInfo. Only values pertaining to beam, optical depth and spectral index are handled here. All others give back Undefined. See usage in Image FITS conversion classes.

static Vector<String> casacore::ImageInfo::keywordNamesFITS ( )

static

It might be useful to know what FITS keyword names are used in to/from FITS so we can remove them so they won't be used more than once.

The names are in lower case.

static void casacore::ImageInfo::logMessage	(	Bool &	warn,
		LogIO &	os,
		Bool	relax,
		const String &	msg1,
		const String	msg2 = `String()`
	)

static

If relax=True, give a warning message if warn=True and set to False.

Otherwise give an error showing msg1 only.

void casacore::ImageInfo::mergeBeams	(	ImageBeamSet &	beamsOut,
		const ImageInfo &	infoThat,
		Bool	relax,
		LogIO &	os
	)		const

Merge the beam sets and check if they match.

static ImageInfo::ImageTypes casacore::ImageInfo::MiriadImageType ( const String & type )

static

Convert the Miriad 'btype' strings to the ImageType.

Some Miriad 'btype's are dealt with in Casacore via the Stokes axis (fractional_polarization, polarized_intensity, position_angle) and so these will return Undefined.

uInt casacore::ImageInfo::nChannels ( ) const

inline

Number of channels and stokes in per hyper-plane beam array.

Definition at line 250 of file ImageInfo.h.

References _beams, and casacore::ImageBeamSet::nchan().

uInt casacore::ImageInfo::nStokes ( ) const

inline

Definition at line 252 of file ImageInfo.h.

References _beams, and casacore::ImageBeamSet::nstokes().

String casacore::ImageInfo::objectName ( ) const

Set and get the Image object name.

ImageInfo& casacore::ImageInfo::operator= ( const ImageInfo & other )

Assignment (copy semantics)

void casacore::ImageInfo::removeRestoringBeam ( )

Remove all beams (global or per plane) associated with this object.

GaussianBeam casacore::ImageInfo::restoringBeam	(	Int	channel = `-1`,
		Int	stokes = `-1`
	)		const

Set and get the beam.

Zero-based channel and stokes are necessary and used if and only if the ImageBeamSet has multiple beams for such an axis. If just a single beam, that beam is returned. If no (or a null) beam, a null beam is returned.

void casacore::ImageInfo::setAllBeams	(	const uInt	nChannels,
		const uInt	nStokes,
		const GaussianBeam &	beam
	)

Initialize all per-plane beams to the same value.

void casacore::ImageInfo::setBeam	(	Int	channel,
		Int	stokes,
		const Quantity &	major,
		const Quantity &	minor,
		const Quantity &	pa
	)

Set the beam for a specific plane.

A value of channel or stokes of less than 0 means that particular coordinate does not exist. Obviously, at least one of these must be zero or greater. The only consistency checking that is done is to ensure the values of channel and stokes are consistent with the size of the beam array. Additional consistency checks are done when this object is added via ImageInterface<T>::setImageInfo().
This function cannot be used if no beams have been set via set(All)Beams.

void casacore::ImageInfo::setBeam	(	Int	channel,
		Int	stokes,
		const GaussianBeam &	beam
	)

void casacore::ImageInfo::setBeams ( const ImageBeamSet & beams )

Set the per plane beams array directly.

ImageInfo& casacore::ImageInfo::setImageType ( ImageTypes type )

uInt casacore::ImageInfo::setInfoSplitBeamSet	(	uInt	ndone,
		const ImageInfo &	concatInfo,
		const IPosition &	shape,
		const CoordinateSystem &	csys,
		Int	concatAxis
	)

Reset the info and beamset of this image with the appropriate part of the beam set of the concat image it is part of.

It returns the number of channels or polarizations handled.

ImageInfo& casacore::ImageInfo::setObjectName ( const String & object )

void casacore::ImageInfo::setRestoringBeam ( const GaussianBeam & beam )

Set the single global restoring beam.

An exception will be thrown if this object already has multiple beams. In that case, the caller must call removeRestoringBeam() first.

Referenced by setRestoringBeam().

void casacore::ImageInfo::setRestoringBeam	(	const Quantum< Double > &	major,
		const Quantum< Double > &	minor,
		const Quantum< Double > &	pa
	)

inline

Definition at line 209 of file ImageInfo.h.

References setRestoringBeam().

Bool casacore::ImageInfo::toFITS	(	String &	error,
		RecordInterface &	outRecord
	)		const

Functions to interconvert between an ImageInfo and FITS keywords (converted to a Record).

Failure of <tt>fromFITS</tt>

should probably not be regarded as fatal as the default ImageInfo values are viable. For each item contained in the ImageInfo, an attempt to decode it from FITS is made. If any of them fail, False is returned, but it attempts to decode them all. For those that fail an error message is held in error in the order restoring beam, and image type. error will be returned of length 0 if the return value is True, else it will be length 2.

virtual Bool casacore::ImageInfo::toRecord	(	String &	error,
		RecordInterface &	outRecord
	)		const

virtual

Functions to interconvert between an ImageInfo and a record.

These functions are inherited from class RecordTransformable. As new fields get added to ImageInfo these functions should be augmented. Missing fields should not generate an error to in fromRecord to allow for backwards compatibility - null values should be supplied instead. The record field names are: "restoringbeam, imagetype, objectname".

Implements casacore::RecordTransformable.

Member Data Documentation

ImageBeamSet casacore::ImageInfo::_beams

private

Definition at line 362 of file ImageInfo.h.

Referenced by hasBeam(), hasMultipleBeams(), hasSingleBeam(), nChannels(), and nStokes().

Bool casacore::ImageInfo::_warnBeam

mutableprivate

Definition at line 363 of file ImageInfo.h.

ImageTypes casacore::ImageInfo::itsImageType

private

Definition at line 364 of file ImageInfo.h.

String casacore::ImageInfo::itsObjectName

private

Definition at line 365 of file ImageInfo.h.

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

casa/casacore/images/Images/ImageInfo.h

Public Types

Public Member Functions

Static Public Member Functions

Private Member Functions

Private Attributes

Detailed Description

Intended use:

Review Status

Prerequisite

Synopsis

Example

Motivation

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation