Make the union of 2 or more image regions. More...

#include <WCUnion.h>

Inheritance diagram for casacore::WCUnion:

Public Member Functions
	WCUnion (const ImageRegion &region1, const ImageRegion &region2)
	Construct the union of one or more image regions. More...

	WCUnion (const ImageRegion region1, const ImageRegion region2=0, const ImageRegion region3=0, const ImageRegion region4=0, const ImageRegion region5=0, const ImageRegion region6=0, const ImageRegion region7=0, const ImageRegion region8=0, const ImageRegion region9=0, const ImageRegion region10=0)

	WCUnion (const PtrBlock< const ImageRegion * > &regions)

	WCUnion (Bool takeOver, const PtrBlock< const WCRegion * > &regions)
	Construct from multiple regions given as a Block. More...

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

virtual	~WCUnion ()

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

virtual Bool	operator== (const WCRegion &other) const
	Comparison. More...

virtual WCRegion *	cloneRegion () const
	Make a copy of the derived object. More...

virtual String	type () const
	Get the region type. More...

virtual TableRecord	toRecord (const String &tableName) const
	Convert the (derived) object to a record. More...

Public Member Functions inherited from casacore::WCCompound
	WCCompound (const ImageRegion &region1, const ImageRegion &region2)
	Construct from one or more image regions. More...

	WCCompound (const ImageRegion region1, const ImageRegion region2=0, const ImageRegion region3=0, const ImageRegion region4=0, const ImageRegion region5=0, const ImageRegion region6=0, const ImageRegion region7=0, const ImageRegion region8=0, const ImageRegion region9=0, const ImageRegion region10=0)

	WCCompound (const PtrBlock< const ImageRegion * > &regions)

	WCCompound (Bool takeOver, const PtrBlock< const WCRegion * > &regions)
	Construct from multiple regions given as a Block. More...

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

virtual	~WCCompound ()

const PtrBlock< const WCRegion * > &	regions () const
	Get the contributing regions. More...

Public Member Functions inherited from casacore::WCRegion
	WCRegion ()

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

virtual	~WCRegion ()
	Destructor. More...

Bool	operator!= (const WCRegion &other) const

virtual uInt	ndim () const
	Get the dimensionality (i.e. More...

const Record &	getAxesDesc () const
	Get the description of all axes. More...

const Record &	getAxisDesc (uInt axis) const
	Get the description of the given axis. More...

Int	axisNr (const Record &desc, const Record &axesDesc) const
	Return the axis number of the description of an axis in the full axes description. More...

Bool	isAxisDescEqual (const Record &desc1, const Record &desc2) const
	Are both axis descriptions equal? More...

virtual Bool	canExtend () const
	Can the region extend itself? By default it cannot. More...

const String &	comment () const
	Get or set the comment. More...

void	setComment (const String &comment)

virtual LCRegion *	toLCRegion (const CoordinateSystem &cSys, const IPosition &shape) const
	Convert to an LCRegion using the given new coordinate system and shape. More...

LCRegion *	toLCRegionAxes (const CoordinateSystem &cSys, const IPosition &shape, const IPosition &pixelAxesMap, const IPosition &outOrder) const
	Convert to an LCRegion using the given coordinate system and shape. More...

void	defineRecordFields (RecordInterface &record, const String &className) const
	Define the type and class name in the record. More...

Static Public Member Functions
static String	className ()
	Get the class name (to store in the record). More...

static WCUnion *	fromRecord (const TableRecord &, const String &tableName)
	Convert correct object from a record. More...

Static Public Member Functions inherited from casacore::WCRegion
static WCRegion *	fromRecord (const TableRecord &rec, const String &tableName)
	Convert correct object from a record. More...

Protected Member Functions
virtual LCRegion *	doToLCRegion (const CoordinateSystem &cSys, const IPosition &shape, const IPosition &pixelAxesMap, const IPosition &outOrder) const
	Convert to an LCRegion using the given coordinate system and shape. More...

Protected Member Functions inherited from casacore::WCCompound
WCCompound &	operator= (const WCCompound &other)
	Assignment (copy semantics) makes only sense for a derived class. More...

void	multiToLCRegion (PtrBlock< const LCRegion * > &regions, const CoordinateSystem &cSys, const IPosition &shape, const IPosition &pixelAxesMap, const IPosition &extendAxes) const
	Convert each WCRegion to an LCRegion. More...

TableRecord	makeRecord (const String &tableName) const
	Store the contributing regions in a record. More...

Protected Member Functions inherited from casacore::WCRegion
WCRegion &	operator= (const WCRegion &other)
	Assignment (copy semantics) makes only sense for a derived class. More...

void	addAxisDesc (const Record &axisDesc)
	Add an axis with its description. More...

Record	makeAxisDesc (const CoordinateSystem &cSys, uInt pixelAxis) const
	Make a description of a pixel axis in the coordinate system. More...

Record	makeAxesDesc (const CoordinateSystem &cSys) const
	Make a description of all pixel axes in the coordinate system (in pixel axes order). More...

void	makeWorldAbsolute (Vector< Double > &world, const Vector< Int > &absRel, const CoordinateSystem &cSys, const IPosition &shape) const
	Convert relative to absolute world as needed. More...

void	checkAxes (const IPosition &pixelAxes, const CoordinateSystem &cSys, const Vector< String > &quantityUnits) const

Additional Inherited Members
Static Protected Member Functions inherited from casacore::WCCompound
static void	unmakeRecord (PtrBlock< const WCRegion * > &, const TableRecord &, const String &tableName)
	Retrieve the contributing objects from the record. More...

Static Protected Member Functions inherited from casacore::WCRegion
static void	unitInit ()

static void	convertPixel (Double &pixel, const Double &value, const String &unit, const Int absRel, const Double refPix, const Int shape)

Detailed Description

Make the union of 2 or more image regions.

Intended use:

Public interface

Prerequisite

WCCompound

Synopsis

The WCUnion class is a specialization of class WCCompound. It makes it possible to take the union of 2 or more image regions. Note that only world coordinate regions can be used in a compound, thus an LCSlicer object is not allowed in a union.

The union of regions is the collection of the pixels masked-on in any region. Note that the bounding box of a union is determined by the outermost pixels. It means that if regions are very far apart, the bounding box of the union is very large and therefore inefficient.

The regions in a union can have different axes and dimensionalities. The axes and dimensionality of a union are determined by the collection of all different axes in its regions. Each individual region will be auto-extended along the axes not being part of the region. E.g. one can define a WCBox with axis RA and another WCBox with axis DEC. The union will be 2-dim with axes RA and DEC. The first box will be auto-extended to cover the DEC axis, which results in a 2-dim box with its DEC axis the length of the image's DEC axis. Similarly the second box will be auto-extended to cover the RA axis.

Example

Definition at line 85 of file WCUnion.h.

Constructor & Destructor Documentation

casacore::WCUnion::WCUnion	(	const ImageRegion &	region1,
		const ImageRegion &	region2
	)

Construct the union of one or more image regions.

The image regions have to contain WCRegion objects, otherwise an exception is thrown.

casacore::WCUnion::WCUnion	(	const ImageRegion *	region1,
		const ImageRegion *	region2 = `0`,
		const ImageRegion *	region3 = `0`,
		const ImageRegion *	region4 = `0`,
		const ImageRegion *	region5 = `0`,
		const ImageRegion *	region6 = `0`,
		const ImageRegion *	region7 = `0`,
		const ImageRegion *	region8 = `0`,
		const ImageRegion *	region9 = `0`,
		const ImageRegion *	region10 = `0`
	)

casacore::WCUnion::WCUnion ( const PtrBlock< const ImageRegion * > & regions )

casacore::WCUnion::WCUnion	(	Bool	takeOver,
		const PtrBlock< const WCRegion * > &	regions
	)

Construct from multiple regions given as a Block.

When takeOver is True, the destructor will delete the given regions. Otherwise a copy of the regions is made.

casacore::WCUnion::WCUnion ( const WCUnion & other )

Copy constructor (copy semantics).

virtual casacore::WCUnion::~WCUnion ( )

virtual

Member Function Documentation

static String casacore::WCUnion::className ( )

static

Get the class name (to store in the record).

virtual WCRegion* casacore::WCUnion::cloneRegion ( ) const

virtual

Make a copy of the derived object.

Implements casacore::WCRegion.

virtual LCRegion* casacore::WCUnion::doToLCRegion	(	const CoordinateSystem &	cSys,
		const IPosition &	shape,
		const IPosition &	pixelAxesMap,
		const IPosition &	outOrder
	)		const