Hold mathematical expressions involving ImageInterface objects. More...

#include <WCLELMask.h>

Inheritance diagram for casacore::ImageExpr< T >:

Public Member Functions
	ImageExpr ()
	The default constructor. More...

	ImageExpr (const LatticeExpr< T > &latticeExpr, const String &expr, const String &fileName=String())
	Construct an ImageExpr from a LatticeExpr. More...

	ImageExpr (const LatticeExpr< T > &latticeExpr, const String &expr, const String &fileName, const JsonKVMap &)

	ImageExpr (const LatticeExpr< T > &latticeExpr, const String &expr, const String &fileName, const LELImageCoord &imCoord)
	Same as previous constructor, but the coordinates are taken from the given LELImageCoord object. More...

	ImageExpr (const ImageExpr< T > &other)
	Copy constructor (reference semantics) More...

	~ImageExpr ()
	Destructor does nothing. More...

ImageExpr< T > &	operator= (const ImageExpr< T > &other)
	Assignment (reference semantics) More...

virtual ImageInterface< T > *	cloneII () const
	Make a copy of the object (reference semantics). More...

virtual void	save (const String &fileName) const
	Save the image in an AipsIO file with the given name. More...

void	setFileName (const String &name)
	Set the file name. More...

virtual Bool	setMiscInfo (const RecordInterface &newInfo)
	Replace the miscinfo in the ImageExpr, which writes the image.expr file. More...

virtual String	imageType () const
	Get the image type (returns name of derived class). More...

virtual Bool	isMasked () const
	Has the object really a mask? More...

virtual const LatticeRegion *	getRegionPtr () const
	Get the region used. More...

virtual IPosition	shape () const
	return the shape of the ImageExpr More...

virtual void	resize (const TiledShape &newShape)
	Function which changes the shape of the ImageExpr. More...

virtual Bool	doGetMaskSlice (Array< Bool > &buffer, const Slicer &section)
	Do the actual get of the mask data. More...

virtual Bool	doGetSlice (Array< T > &buffer, const Slicer &theSlice)
	Do the actual get of the data. More...

virtual void	doPutSlice (const Array< T > &sourceBuffer, const IPosition &where, const IPosition &stride)
	putSlice is not possible on an expression, so it throws an exception. More...

virtual String	name (Bool stripPath=False) const
	If the object is persistent, the file name is given. More...

virtual Bool	ok () const
	Check class invariants. More...

virtual LatticeIterInterface< T > *	makeIter (const LatticeNavigator &navigator, Bool useRef) const
	These are the implementations of the LatticeIterator letters. More...

virtual Bool	isWritable () const
	Returns False, as the ImageExpr is not writable. More...

virtual Bool	isPersistent () const
	Is the lattice persistent and can it be loaded by other processes as well? More...

virtual IPosition	doNiceCursorShape (uInt maxPixels) const
	Help the user pick a cursor for most efficient access if they only want pixel values and don't care about the order or dimension of the cursor. More...

virtual Bool	lock (FileLocker::LockType, uInt nattempts)
	Handle the (un)locking and syncing. More...

virtual void	unlock ()

virtual Bool	hasLock (FileLocker::LockType) const

virtual void	resync ()
	Resynchronize the Lattice object with the lattice file. More...

virtual void	tempClose ()
	Temporarily close the lattice. More...

virtual void	reopen ()
	Explicitly reopen the temporarily closed lattice. More...

const LatticeExpr< T > &	expression () const
	Get the lattice expression. More...

Public Member Functions inherited from casacore::ImageInterface< T >
	ImageInterface ()

	ImageInterface (const RegionHandler &regionHandler)
	Construct for a specific region handler object. More...

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

virtual	~ImageInterface ()

virtual MaskedLattice< T > *	cloneML () const
	Make a copy of the derived object (reference semantics). More...

virtual Bool	setUnits (const Unit &newUnits)
	Function which get and set the units associated with the image pixels (i.e. More...

virtual const Unit &	units () const

virtual Bool	setCoordinateInfo (const CoordinateSystem &coords)
	Functions to set or replace the coordinate information in the Image Returns False on failure, e.g. More...

const CoordinateSystem &	coordinates () const

virtual LELCoordinates	lelCoordinates () const
	Function to get a LELCoordinate object containing the coordinates. More...

LoggerHolder &	logger ()
	Get access to the LoggerHolder. More...

const LoggerHolder &	logger () const

LogIO &	logSink ()
	Allow messages to be logged to this ImageInterface. More...

const LogIO &	logSink () const

void	appendLog (const LoggerHolder &other)
	Add the messages from the other image logger to this one. More...

const TableRecord &	miscInfo () const
	Often we have miscellaneous information we want to attach to an image. More...

const ImageInfo &	imageInfo () const
	The ImageInfo object contains some miscellaneous information about the image which unlike that stored in MiscInfo, has a standard list of things, such as the restoring beam. More...

ImageInfo &	rwImageInfo ()
	Get non-const access to the ImageInfo. More...

virtual Bool	setImageInfo (const ImageInfo &info)

virtual ImageAttrHandler &	attrHandler (Bool createHandler=False)
	Get access to the attribute handler. More...

ImageAttrHandler &	roAttrHandler () const

Bool	canDefineRegion () const
	Can the image handle region definition? More...

virtual ImageRegion	makeMask (const String &name, Bool defineAsRegion=True, Bool setAsDefaultMask=True, Bool initialize=False, Bool value=True)
	Make a mask which is suitable for the type of image. More...

virtual void	defineRegion (const String &name, const ImageRegion &region, RegionHandler::GroupType, Bool overwrite=False)
	Define a region/mask belonging to the image. More...

virtual Bool	hasRegion (const String &regionName, RegionHandler::GroupType=RegionHandler::Any) const
	Does the image have a region with the given name? More...

virtual ImageRegion *	getImageRegionPtr (const String &name, RegionHandler::GroupType=RegionHandler::Any, Bool throwIfUnknown=True) const
	Get a region/mask belonging to the image from the given group (which can be Any). More...

virtual void	renameRegion (const String &newName, const String &oldName, RegionHandler::GroupType=RegionHandler::Any, Bool overwrite=False)
	Rename a region. More...

virtual void	removeRegion (const String &name, RegionHandler::GroupType=RegionHandler::Any, Bool throwIfUnknown=True)
	Remove a region/mask belonging to the image from the given group (which can be Any). More...

virtual Vector< String >	regionNames (RegionHandler::GroupType=RegionHandler::Any) const
	Get the names of all regions/masks. More...

virtual void	useMask (MaskSpecifier=MaskSpecifier())
	Use the mask as specified. More...

virtual void	setDefaultMask (const String &regionName)
	Set the default pixelmask to the mask with the given name (which has to exist in the "masks" group). More...

virtual String	getDefaultMask () const
	Get the name of the default pixelmask. More...

ImageRegion	getRegion (const String &regionName, RegionHandler::GroupType=RegionHandler::Any) const
	Get a region belonging to the image. More...

String	makeUniqueRegionName (const String &rootName, uInt startNumber=1) const
	Make a unique region name from the given root name, thus make it such that the name is not already in use for a region or mask. More...

Bool	toRecord (String &error, RecordInterface &outRec)
	Save and restore an ImageInterface object to or from a state Record. More...

Bool	fromRecord (String &error, const RecordInterface &inRec)

Public Member Functions inherited from casacore::MaskedLattice< T >
	MaskedLattice ()
	Default constructor. More...

	MaskedLattice (const MaskedLattice< T > &)
	Copy constructor. More...

virtual	~MaskedLattice ()
	a virtual destructor is needed so that it will use the actual destructor in the derived class More...

virtual Lattice< T > *	clone () const
	Make a copy of the derived object (reference semantics). More...

virtual Bool	hasPixelMask () const
	Does the lattice have a pixelmask? The default implementation returns False. More...

virtual const Lattice< Bool > &	pixelMask () const
	Get access to the pixelmask. More...

virtual Lattice< Bool > &	pixelMask ()

const LatticeRegion &	region () const
	Get the region used. More...

Bool	getMask (COWPtr< Array< Bool > > &buffer, Bool removeDegenerateAxes=False) const
	Get the mask or a slice from the mask. More...

Bool	getMaskSlice (COWPtr< Array< Bool > > &buffer, const Slicer &section, Bool removeDegenerateAxes=False) const

Bool	getMaskSlice (COWPtr< Array< Bool > > &buffer, const IPosition &start, const IPosition &shape, Bool removeDegenerateAxes=False) const

Bool	getMaskSlice (COWPtr< Array< Bool > > &buffer, const IPosition &start, const IPosition &shape, const IPosition &stride, Bool removeDegenerateAxes=False) const

Bool	getMask (Array< Bool > &buffer, Bool removeDegenerateAxes=False)

Bool	getMaskSlice (Array< Bool > &buffer, const Slicer &section, Bool removeDegenerateAxes=False)

Bool	getMaskSlice (Array< Bool > &buffer, const IPosition &start, const IPosition &shape, Bool removeDegenerateAxes=False)

Bool	getMaskSlice (Array< Bool > &buffer, const IPosition &start, const IPosition &shape, const IPosition &stride, Bool removeDegenerateAxes=False)

Array< Bool >	getMask (Bool removeDegenerateAxes=False) const

Array< Bool >	getMaskSlice (const Slicer &section, Bool removeDegenerateAxes=False) const

Array< Bool >	getMaskSlice (const IPosition &start, const IPosition &shape, Bool removeDegenerateAxes=False) const

Array< Bool >	getMaskSlice (const IPosition &start, const IPosition &shape, const IPosition &stride, Bool removeDegenerateAxes=False) const

Public Member Functions inherited from casacore::Lattice< T >
virtual	~Lattice ()
	a virtual destructor is needed so that it will use the actual destructor in the derived class More...

virtual DataType	dataType () const
	Get the data type of the lattice. More...

T	operator() (const IPosition &where) const
	Return the value of the single element located at the argument IPosition. More...

virtual T	getAt (const IPosition &where) const

virtual void	putAt (const T &value, const IPosition &where)
	Put the value of a single element. More...

Bool	get (COWPtr< Array< T > > &buffer, Bool removeDegenerateAxes=False) const
	Functions which extract an Array of values from a Lattice. More...

Bool	getSlice (COWPtr< Array< T > > &buffer, const Slicer &section, Bool removeDegenerateAxes=False) const

Bool	getSlice (COWPtr< Array< T > > &buffer, const IPosition &start, const IPosition &shape, Bool removeDegenerateAxes=False) const

Bool	getSlice (COWPtr< Array< T > > &buffer, const IPosition &start, const IPosition &shape, const IPosition &stride, Bool removeDegenerateAxes=False) const

Bool	get (Array< T > &buffer, Bool removeDegenerateAxes=False)

Bool	getSlice (Array< T > &buffer, const Slicer &section, Bool removeDegenerateAxes=False)

Bool	getSlice (Array< T > &buffer, const IPosition &start, const IPosition &shape, Bool removeDegenerateAxes=False)

Bool	getSlice (Array< T > &buffer, const IPosition &start, const IPosition &shape, const IPosition &stride, Bool removeDegenerateAxes=False)

Array< T >	get (Bool removeDegenerateAxes=False) const

Array< T >	getSlice (const Slicer &section, Bool removeDegenerateAxes=False) const

Array< T >	getSlice (const IPosition &start, const IPosition &shape, Bool removeDegenerateAxes=False) const

Array< T >	getSlice (const IPosition &start, const IPosition &shape, const IPosition &stride, Bool removeDegenerateAxes=False) const

void	putSlice (const Array< T > &sourceBuffer, const IPosition &where, const IPosition &stride)
	A function which places an Array of values within this instance of the Lattice at the location specified by the IPosition "where", incrementing by "stride". More...

void	putSlice (const Array< T > &sourceBuffer, const IPosition &where)

void	put (const Array< T > &sourceBuffer)

virtual void	set (const T &value)
	Set all elements in the Lattice to the given value. More...

virtual void	apply (T(*function)(T))
	Replace every element, x, of the Lattice with the result of f(x). More...

virtual void	apply (T(*function)(const T &))

virtual void	apply (const Functional< T, T > &function)

void	operator+= (const Lattice< T > &other)
	Add, subtract, multiple, or divide by another Lattice. More...

void	operator-= (const Lattice< T > &other)

void	operator*= (const Lattice< T > &other)

void	operator/= (const Lattice< T > &other)

virtual void	copyData (const Lattice< T > &from)
	Copy the data from the given lattice to this one. More...

virtual void	copyDataTo (Lattice< T > &to) const
	Copy the data from this lattice to the given lattice. More...

virtual uInt	advisedMaxPixels () const
	This function returns the advised maximum number of pixels to include in the cursor of an iterator. More...

Public Member Functions inherited from casacore::LatticeBase
virtual	~LatticeBase ()
	A virtual destructor is needed so that it will use the actual destructor in the derived class. More...

virtual Bool	isPaged () const
	Is the lattice paged to disk? The default implementation returns False. More...

virtual Bool	canReferenceArray () const
	Can the lattice data be referenced as an array section? That is the case for an ArrayLattice or a Temp/SubLattice using it. More...

virtual void	flush ()
	Flush the data (but do not unlock). More...

virtual uInt	ndim () const
	Return the number of axes in this Lattice. More...

virtual size_t	nelements () const
	Return the total number of elements in this Lattice. More...

size_t	size () const

Bool	conform (const LatticeBase &other) const
	Return a value of "True" if this instance of Lattice and 'other' have the same shape, otherwise returns a value of "False". More...

IPosition	niceCursorShape (uInt maxPixels) const
	Returns a recommended cursor shape for iterating through all the pixels in the Lattice. More...

IPosition	niceCursorShape () const

virtual uInt	maximumCacheSize () const
	Maximum cache size - not necessarily all used. More...

virtual void	setMaximumCacheSize (uInt howManyPixels)
	Set the maximum (allowed) cache size as indicated. More...

virtual void	setCacheSizeInTiles (uInt howManyTiles)
	Set the actual cache size for this Array to be big enough for the indicated number of tiles. More...

virtual void	setCacheSizeFromPath (const IPosition &sliceShape, const IPosition &windowStart, const IPosition &windowLength, const IPosition &axisPath)
	Set the cache size as to "fit" the indicated path. More...

virtual void	clearCache ()
	Clears and frees up the caches, but the maximum allowed cache size is unchanged from when setCacheSize was called. More...

virtual void	showCacheStatistics (ostream &os) const
	Report on cache success. More...

Private Member Functions
void	init (const LatticeExpr< T > &latticeExpr, const String &expr, const String &fileName, const JsonKVMap &)

Private Attributes
LatticeExpr< T >	latticeExpr_p

Unit	unit_p

String	exprString_p

String	fileName_p

Additional Inherited Members
Protected Member Functions inherited from casacore::ImageInterface< T >
ImageInterface &	operator= (const ImageInterface &other)
	Assignment (copy semantics) is only useful for derived classes. More...

Bool	restoreImageInfo (const RecordInterface &rec)
	Restore the image info from the record. More...

void	setLogMember (const LoggerHolder &logger)
	Set the image logger variable. More...

void	setImageInfoMember (const ImageInfo &imageInfo)
	Set the image info variable. More...

void	setCoordsMember (const CoordinateSystem &coords)
	Set the coordinate system variable. More...

void	setUnitMember (const Unit &unit)
	Set the unit variable. More...

void	setMiscInfoMember (const RecordInterface &rec)
	Set the miscinfo variable. More...

RegionHandler *	getRegionHandler ()
	Get access to the region handler. More...

Protected Member Functions inherited from casacore::MaskedLattice< T >
MaskedLattice< T > &	operator= (const MaskedLattice< T > &)
	Assignment can only be used by derived classes. More...

Protected Member Functions inherited from casacore::Lattice< T >
	Lattice ()
	Define default constructor to satisfy compiler. More...

virtual void	handleMath (const Lattice< T > &from, int oper)
	Handle the Math operators (+=, -=, *=, /=). More...

virtual void	handleMathTo (Lattice< T > &to, int oper) const

	Lattice (const Lattice< T > &)
	Copy constructor and assignment can only be used by derived classes. More...

Lattice< T > &	operator= (const Lattice< T > &)

template<>
void	handleMathTo (Lattice< Bool > &, int) const

Protected Member Functions inherited from casacore::LatticeBase
	LatticeBase ()
	Define default constructor to be used by derived classes. More...

	LatticeBase (const LatticeBase &)
	Copy constructor and assignment can only be used by derived classes. More...

LatticeBase &	operator= (const LatticeBase &)

void	throwBoolMath () const
	Throw an exception for arithmetic on a Bool Lattice. More...

Detailed Description

template<class T>
class casacore::ImageExpr< T >

Hold mathematical expressions involving ImageInterface objects.

Intended use:

Public interface

Review Status

Test programs:: tImageExpr

Prerequisite

Etymology

This class holds a LatticeExpr object but inherits from ImageInterface hence ImageExpr

Synopsis

An ImageExpr object holds a LatticeExpr object which can be used to evaluate mathematical expressions involving Lattices. ImageExpr exists so that direct manipulation of LatticeExpr objects by methods expecting an ImageInterface, rather than a Lattice can occur.

The ImageExpr object is constructed from a LatticeExpr object, but only if the latter has true Coordinates associated with it. The ImageExpr object is not writable, so the ImageExpr object functions like a read only ImageInterface.

Example

PagedImage<Float> a("imageB");                // Open PagedImages
PagedImage<Float> b("imageB");
LatticeExprNode node(a+b);                    // Create ImageExpr
LatticeExpr<Float> lExpr(node);
ImageExpr<Float> iExpr(lExpr);
LogOrigin or("imageImpl", "main()", WHERE);   // Create statistics object
LogIO logger(or);
ImageStatistics<Float> stats(iExpr, logger);
Bool ok = stats.display();                              // Display statistics

The ImageExpr object is evaluated during the call to stats.dislay(). Previously, the expression tree has been constructed, but not evaluated.

Motivation

This enables one to evaluate expressions but not to have to write them out to an output image.

Definition at line 46 of file WCLELMask.h.

Constructor & Destructor Documentation

template<class T>

casacore::ImageExpr< T >::ImageExpr ( )

The default constructor.

template<class T>

casacore::ImageExpr< T >::ImageExpr	(	const LatticeExpr< T > &	latticeExpr,
		const String &	expr,
		const String &	fileName = `String()`
	)

Construct an ImageExpr from a LatticeExpr.

The expr given should be the original expression string. The fileName argument is meant for ImageOpener. The coordinates are taken from the expression, usually the first image. An exception is thrown if the expression has no coordinates.

template<class T>

casacore::ImageExpr< T >::ImageExpr	(	const LatticeExpr< T > &	latticeExpr,
		const String &	expr,
		const String &	fileName,
		const JsonKVMap &
	)

template<class T>

casacore::ImageExpr< T >::ImageExpr	(	const LatticeExpr< T > &	latticeExpr,
		const String &	expr,
		const String &	fileName,
		const LELImageCoord &	imCoord
	)

Same as previous constructor, but the coordinates are taken from the given LELImageCoord object.

template<class T>

casacore::ImageExpr< T >::ImageExpr ( const ImageExpr< T > & other )

Copy constructor (reference semantics)

template<class T>

casacore::ImageExpr< T >::~ImageExpr ( )

Destructor does nothing.

Member Function Documentation

template<class T>

virtual ImageInterface<T>* casacore::ImageExpr< T >::cloneII ( ) const

virtual

Make a copy of the object (reference semantics).

Implements casacore::ImageInterface< T >.

template<class T>

virtual Bool casacore::ImageExpr< T >::doGetMaskSlice	(	Array< Bool > &	buffer,
		const Slicer &	section
	)

virtual

Do the actual get of the mask data.

The return value is always False, thus the buffer does not reference another array.

Reimplemented from casacore::MaskedLattice< T >.

template<class T>

virtual Bool casacore::ImageExpr< T >::doGetSlice	(	Array< T > &	buffer,
		const Slicer &	theSlice
	)

virtual

Do the actual get of the data.

Implements casacore::Lattice< T >.

template<class T>

virtual IPosition casacore::ImageExpr< T >::doNiceCursorShape ( uInt maxPixels ) const

virtual

Help the user pick a cursor for most efficient access if they only want pixel values and don't care about the order or dimension of the cursor.

Reimplemented from casacore::LatticeBase.

template<class T>

virtual void casacore::ImageExpr< T >::doPutSlice	(	const Array< T > &	sourceBuffer,
		const IPosition &	where,
		const IPosition &	stride
	)

virtual

putSlice is not possible on an expression, so it throws an exception.

Implements casacore::Lattice< T >.

template<class T>

const LatticeExpr<T>& casacore::ImageExpr< T >::expression ( ) const

inline

Get the lattice expression.

Definition at line 221 of file ImageExpr.h.

template<class T>

virtual const LatticeRegion* casacore::ImageExpr< T >::getRegionPtr ( ) const

virtual

Get the region used.

Implements casacore::MaskedLattice< T >.

template<class T>

virtual Bool casacore::ImageExpr< T >::hasLock ( FileLocker::LockType ) const

virtual

Reimplemented from casacore::LatticeBase.

template<class T>

virtual String casacore::ImageExpr< T >::imageType ( ) const

virtual

Get the image type (returns name of derived class).

Implements casacore::ImageInterface< T >.

template<class T>

void casacore::ImageExpr< T >::init	(	const LatticeExpr< T > &	latticeExpr,
		const String &	expr,
		const String &	fileName,
		const JsonKVMap &
	)

private

template<class T>

virtual Bool casacore::ImageExpr< T >::isMasked ( ) const

virtual

Has the object really a mask?

Reimplemented from casacore::MaskedLattice< T >.

template<class T>

virtual Bool casacore::ImageExpr< T >::isPersistent ( ) const

virtual

Is the lattice persistent and can it be loaded by other processes as well?

Reimplemented from casacore::LatticeBase.

template<class T>

virtual Bool casacore::ImageExpr< T >::isWritable ( ) const

virtual

Returns False, as the ImageExpr is not writable.

Reimplemented from casacore::LatticeBase.

template<class T>

virtual Bool casacore::ImageExpr< T >::lock	(	FileLocker::LockType	,
		uInt	nattempts
	)

virtual

Handle the (un)locking and syncing.

Reimplemented from casacore::LatticeBase.

template<class T>

virtual LatticeIterInterface<T>* casacore::ImageExpr< T >::makeIter	(	const LatticeNavigator &	navigator,
		Bool	useRef
	)		const

virtual

These are the implementations of the LatticeIterator letters.

Note: not for public use

Reimplemented from casacore::Lattice< T >.

template<class T>

virtual String casacore::ImageExpr< T >::name ( Bool stripPath = False ) const

virtual

If the object is persistent, the file name is given.

Otherwise it returns the expression string given in the constructor.

Implements casacore::ImageInterface< T >.

Referenced by casacore::ImageExpr< Bool >::setFileName().

template<class T>

virtual Bool casacore::ImageExpr< T >::ok ( ) const

virtual

Check class invariants.

Implements casacore::ImageInterface< T >.

template<class T>

ImageExpr<T>& casacore::ImageExpr< T >::operator= ( const ImageExpr< T > & other )

Assignment (reference semantics)

template<class T>

virtual void casacore::ImageExpr< T >::reopen ( )

virtual

Explicitly reopen the temporarily closed lattice.

By default the function does not do anything at all.

Reimplemented from casacore::LatticeBase.

template<class T>

virtual void casacore::ImageExpr< T >::resize ( const TiledShape & newShape )

virtual

Function which changes the shape of the ImageExpr.

Throws an exception as ImageExpr is not writable.

Implements casacore::ImageInterface< T >.

template<class T>

virtual void casacore::ImageExpr< T >::resync ( )

virtual

Resynchronize the Lattice object with the lattice file.

This function is only useful if no read-locking is used, ie. if the table lock option is UserNoReadLocking or AutoNoReadLocking. In that cases the table system does not acquire a read-lock, thus does not synchronize itself automatically.
By default the function does not do anything at all.

Reimplemented from casacore::LatticeBase.

template<class T>

virtual void casacore::ImageExpr< T >::save ( const String & fileName ) const

virtual

Save the image in an AipsIO file with the given name.

It can be opened by ImageOpener::openExpr.

Reimplemented from casacore::LatticeBase.

template<class T>

void casacore::ImageExpr< T >::setFileName ( const String & name )

inline

Set the file name.

Definition at line 150 of file ImageExpr.h.