Make the difference of 2 image regions. More...

#include <WCDifference.h>

Inheritance diagram for casa::WCDifference:

Public Member Functions
	WCDifference (const ImageRegion &region1, const ImageRegion &region2)
	Construct the difference of one or more image regions.
	WCDifference (const PtrBlock< const ImageRegion * > &regions)
	WCDifference (Bool takeOver, const PtrBlock< const WCRegion * > &regions)
	Construct from multiple regions given as a Block.
	WCDifference (const WCDifference &other)
	Copy constructor (copy semantics).
virtual	~WCDifference ()
WCDifference &	operator= (const WCDifference &other)
	Assignment (copy semantics).
virtual Bool	operator== (const WCRegion &other) const
	Comparison.
virtual WCRegion *	cloneRegion () const
	Make a copy of the derived object.
virtual String	type () const
	Get the region type.
virtual TableRecord	toRecord (const String &tableName) const
	Convert the (derived) object to a record.
Static Public Member Functions
static String	className ()
	Get the class name (to store in the record).
static WCDifference *	fromRecord (const TableRecord &, const String &tableName)
	Convert correct object from a record.
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.

Detailed Description

Make the difference of 2 image regions.

Intended use:

Public interface

Prerequisite

WCCompound

Synopsis

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

The difference consists of all pixels masked-on in the first region and not masked-on in the second region.

The regions in a difference can have different axes and dimensionalities. The axes and dimensionality of a difference 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 difference 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 81 of file WCDifference.h.

Constructor & Destructor Documentation

casa::WCDifference::WCDifference	(	const ImageRegion &	region1,
		const ImageRegion &	region2
	)

Construct the difference of one or more image regions.

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

casa::WCDifference::WCDifference ( const PtrBlock< const ImageRegion * > & regions )

casa::WCDifference::WCDifference	(	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.

casa::WCDifference::WCDifference ( const WCDifference & other )

Copy constructor (copy semantics).

virtual casa::WCDifference::~WCDifference ( ) [virtual]

Member Function Documentation

static String casa::WCDifference::className ( ) [static]

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

virtual WCRegion* casa::WCDifference::cloneRegion ( ) const [virtual]

Make a copy of the derived object.

Implements casa::WCRegion.

virtual LCRegion* casa::WCDifference::doToLCRegion	(	const CoordinateSystem &	cSys,
		const IPosition &	shape,
		const IPosition &	pixelAxesMap,
		const IPosition &	outOrder
	)		const `[protected, virtual]`