Class providing native access to MIRIAD images. More...

#include <MIRIADImage.h>

Inheritance diagram for casa::MIRIADImage:

Public Member Functions
	MIRIADImage (const String &name)
	Construct a MIRIADImage from the disk MIRIAD dataset name and apply mask.
	MIRIADImage (const String &name, const MaskSpecifier &)
	Construct a MIRIADImage from the disk MIRIAD file name and apply mask or not.
	MIRIADImage (const MIRIADImage &other)
	Copy constructor (reference semantics)
	~MIRIADImage ()
	Destructor does nothing.
MIRIADImage &	operator= (const MIRIADImage &other)
	Assignment (reference semantics)
virtual ImageInterface< Float > *	cloneII () const
	Make a copy of the object with new (reference semantics).
virtual String	imageType () const
	Get the image type (returns MIRIADImage).
virtual void	resize (const TiledShape &newShape)
	Function which changes the shape of the MIRIADImage.
virtual const RecordInterface &	miscInfo () const
	Functions which get and set the units associated with the image pixels (i.e.
virtual Bool	setMiscInfo (const RecordInterface &newInfo)
virtual Bool	isMasked () const
	Has the object really a mask? The MIRIADImage always has a pixel mask and never has a region mask so this should always return True.
virtual Bool	hasPixelMask () const
	MIRIADimage always has a pixel mask so should return True.
virtual const Lattice< Bool > &	pixelMask () const
	Get access to the pixelmask.
virtual Lattice< Bool > &	pixelMask ()
virtual Bool	doGetMaskSlice (Array< Bool > &buffer, const Slicer &section)
	Do the actual get of the mask data.
virtual const LatticeRegion *	getRegionPtr () const
	Get the region used.
virtual Bool	doGetSlice (Array< Float > &buffer, const Slicer &theSlice)
	Do the actual get of the data.
virtual void	doPutSlice (const Array< Float > &sourceBuffer, const IPosition &where, const IPosition &stride)
	The MIRIADImage is not writable, so this throws an exception.
virtual Bool	isPaged () const
	The lattice is paged to disk.
virtual Bool	isPersistent () const
	The lattice is persistent.
virtual Bool	isWritable () const
	The MIRIADImage is not writable.
virtual String	name (Bool stripPath=False) const
	Returns the name of the disk file.
virtual IPosition	shape () const
	return the shape of the MIRIADImage
virtual uInt	advisedMaxPixels () const
	Returns the maximum recommended number of pixels for a cursor.
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.
virtual void	tempClose ()
	Temporarily close the image.
virtual void	reopen ()
	Reopen a temporarily closed image.
virtual Bool	ok () const
	Check class invariants.
DataType	dataType () const
	Return the (internal) data type (TpFloat or TpShort).
virtual uInt	maximumCacheSize () const
	Maximum size - not necessarily all used.
virtual void	setMaximumCacheSize (uInt howManyPixels)
	Set the maximum (allowed) cache size as indicated.
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.
virtual void	setCacheSizeInTiles (uInt howManyTiles)
	Set the actual cache size for this Array to be be big enough for the indicated number of tiles.
virtual void	clearCache ()
	Clears and frees up the caches, but the maximum allowed cache size is unchanged from when setCacheSize was called.
virtual void	showCacheStatistics (ostream &os) const
	Report on cache success.
Static Public Member Functions
static LatticeBase *	openMIRIADImage (const String &name, const MaskSpecifier &)
	Function to open a MIRIAD image.
static void	registerOpenFunction ()
	Register the open function.
Private Member Functions
void	reopenIfNeeded () const
	Reopen the image if needed.
void	setup ()
	Setup the object (used by constructors).
void	open ()
	Open the image (used by setup and reopen).
void	getImageAttributes (CoordinateSystem &cSys, IPosition &shape, ImageInfo &info, Unit &brightnessUnit, Record &miscInfo, Bool &hasBlanks, const String &name)
	Fish things out of the MIRIAD file.
void	crackHeader (CoordinateSystem &cSys, IPosition &shape, ImageInfo &imageInfo, Unit &brightnessUnit, Record &miscInfo, LogIO &os)
Private Attributes
String	name_p
Int	tno_p
MaskSpecifier	maskSpec_p
Unit	unit_p
Record	rec_p
CountedPtr< TiledFileAccess >	pTiledFile_p
Lattice< Bool > *	pPixelMask_p
TiledShape	shape_p
	Float scale_p; Float offset_p; Short magic_p;.
Bool	hasBlanks_p
DataType	dataType_p
Int64	fileOffset_p
Bool	isClosed_p

Detailed Description

Class providing native access to MIRIAD images.

Intended use:

Public interface

Review Status

Test programs:: tMIRIADImage

Prerequisite

Etymology

This class provides native access to MIRIAD images.

Synopsis

A MIRIADImage provides native access to MIRIAD images by accessing them with the TiledFileAccess class. -- or -- the native miriad I/O routines. The MIRIADImage is read only. -- really -- ??

Example

       MIRIADImage im("cube1"); 
       LogIO logger(or);
       ImageStatistics<Float> stats(im, logger);
       Bool ok = stats.display();                              // Display statistics

Motivation

This provides native access to MIRIAD images.

Definition at line 98 of file MIRIADImage.h.

Constructor & Destructor Documentation

casa::MIRIADImage::MIRIADImage ( const String & name ) [explicit]

Construct a MIRIADImage from the disk MIRIAD dataset name and apply mask.

casa::MIRIADImage::MIRIADImage	(	const String &	name,
		const MaskSpecifier &
	)

Construct a MIRIADImage from the disk MIRIAD file name and apply mask or not.

casa::MIRIADImage::MIRIADImage ( const MIRIADImage & other )

Copy constructor (reference semantics)

casa::MIRIADImage::~MIRIADImage ( )

Destructor does nothing.

Member Function Documentation

virtual uInt casa::MIRIADImage::advisedMaxPixels ( ) const [virtual]

Returns the maximum recommended number of pixels for a cursor.

This is the number of pixels in a tile.

Reimplemented from casa::Lattice< Float >.

virtual void casa::MIRIADImage::clearCache ( ) [virtual]

Clears and frees up the caches, but the maximum allowed cache size is unchanged from when setCacheSize was called.

Reimplemented from casa::LatticeBase.

virtual ImageInterface<Float>* casa::MIRIADImage::cloneII ( ) const [virtual]

Make a copy of the object with new (reference semantics).

Implements casa::ImageInterface< Float >.

void casa::MIRIADImage::crackHeader	(	CoordinateSystem &	cSys,
		IPosition &	shape,
		ImageInfo &	imageInfo,
		Unit &	brightnessUnit,
		Record &	miscInfo,
		LogIO &	os
	)		`[private]`

DataType casa::MIRIADImage::dataType ( ) const [inline, virtual]

Return the (internal) data type (TpFloat or TpShort).

Reimplemented from casa::Lattice< Float >.

Definition at line 227 of file MIRIADImage.h.

References dataType_p.

virtual Bool casa::MIRIADImage::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 casa::MaskedLattice< Float >.

virtual Bool casa::MIRIADImage::doGetSlice	(	Array< Float > &	buffer,
		const Slicer &	theSlice
	)		`[virtual]`

Do the actual get of the data.

Returns False as the data do not reference another Array

Implements casa::Lattice< Float >.

virtual IPosition casa::MIRIADImage::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 casa::LatticeBase.

virtual void casa::MIRIADImage::doPutSlice	(	const Array< Float > &	sourceBuffer,
		const IPosition &	where,
		const IPosition &	stride
	)		`[virtual]`

The MIRIADImage is not writable, so this throws an exception.

Implements casa::Lattice< Float >.

void casa::MIRIADImage::getImageAttributes	(	CoordinateSystem &	cSys,
		IPosition &	shape,
		ImageInfo &	info,
		Unit &	brightnessUnit,
		Record &	miscInfo,
		Bool &	hasBlanks,
		const String &	name
	)		`[private]`

Fish things out of the MIRIAD file.

virtual const LatticeRegion* casa::MIRIADImage::getRegionPtr ( ) const [virtual]

Get the region used.

There is no region. Always returns 0.

Implements casa::MaskedLattice< Float >.

virtual Bool casa::MIRIADImage::hasPixelMask ( ) const [virtual]

MIRIADimage always has a pixel mask so should return True.

Reimplemented from casa::MaskedLattice< Float >.

virtual String casa::MIRIADImage::imageType ( ) const [virtual]

Get the image type (returns MIRIADImage).

Implements casa::ImageInterface< Float >.

virtual Bool casa::MIRIADImage::isMasked ( ) const [virtual]

Has the object really a mask? The MIRIADImage always has a pixel mask and never has a region mask so this should always return True.

Reimplemented from casa::MaskedLattice< Float >.

virtual Bool casa::MIRIADImage::isPaged ( ) const [virtual]

The lattice is paged to disk.

Reimplemented from casa::LatticeBase.

virtual Bool casa::MIRIADImage::isPersistent ( ) const [virtual]

The lattice is persistent.

Reimplemented from casa::LatticeBase.

virtual Bool casa::MIRIADImage::isWritable ( ) const [virtual]

The MIRIADImage is not writable.

Reimplemented from casa::LatticeBase.

virtual uInt casa::MIRIADImage::maximumCacheSize ( ) const [virtual]

Maximum size - not necessarily all used.

In pixels.

Reimplemented from casa::LatticeBase.

virtual const RecordInterface& casa::MIRIADImage::miscInfo ( ) const [virtual]

Functions which get and set the units associated with the image pixels (i.e.

the "brightness" unit). Initially the unit is empty. Although the MIRIADimage is not writable, you can change the unit in the MIRIADImage object, but it will not be changed in the MIRIAD disk file.

Often we have miscellaneous information we want to attach to an image. Although MIRIADImage is not writable, you can set a new MiscInfo record, but it will not be stored with the MIRIAD file

Reimplemented from casa::ImageInterface< Float >.

virtual String casa::MIRIADImage::name ( Bool stripPath = False ) const [virtual]

Returns the name of the disk file.

Implements casa::ImageInterface< Float >.

virtual Bool casa::MIRIADImage::ok ( ) const [virtual]

Check class invariants.

Implements casa::ImageInterface< Float >.

void casa::MIRIADImage::open ( ) [private]

Open the image (used by setup and reopen).

static LatticeBase* casa::MIRIADImage::openMIRIADImage	(	const String &	name,
		const MaskSpecifier &
	)		`[static]`

Function to open a MIRIAD image.

MIRIADImage& casa::MIRIADImage::operator= ( const MIRIADImage & other )

Assignment (reference semantics)

virtual const Lattice<Bool>& casa::MIRIADImage::pixelMask ( ) const [virtual]

Get access to the pixelmask.

MIRIADImage always has a pixel mask.

Reimplemented from casa::MaskedLattice< Float >.

virtual Lattice<Bool>& casa::MIRIADImage::pixelMask ( ) [virtual]

Reimplemented from casa::MaskedLattice< Float >.

static void casa::MIRIADImage::registerOpenFunction ( ) [static]

Register the open function.

virtual void casa::MIRIADImage::reopen ( ) [virtual]

Reopen a temporarily closed image.

Reimplemented from casa::LatticeBase.

Referenced by reopenIfNeeded().

void casa::MIRIADImage::reopenIfNeeded ( ) const [inline, private]

Reopen the image if needed.

Definition at line 274 of file MIRIADImage.h.

References isClosed_p, and reopen().

virtual void casa::MIRIADImage::resize ( const TiledShape & newShape ) [virtual]

Function which changes the shape of the MIRIADImage.

Throws an exception as MIRIADImage is not writable.

Implements casa::ImageInterface< Float >.

virtual void casa::MIRIADImage::setCacheSizeFromPath	(	const IPosition &	sliceShape,
		const IPosition &	windowStart,
		const IPosition &	windowLength,
		const IPosition &	axisPath
	)		`[virtual]`

Set the cache size as to "fit" the indicated path.

Reimplemented from casa::LatticeBase.

virtual void casa::MIRIADImage::setCacheSizeInTiles ( uInt howManyTiles ) [virtual]

Set the actual cache size for this Array to be be big enough for the indicated number of tiles.

This cache is not shared with PagedArrays in other rows and is always clipped to be less than the maximum value set using the setMaximumCacheSize member function. tiles. Tiles are cached using a first in first out algorithm.

Reimplemented from casa::LatticeBase.

virtual void casa::MIRIADImage::setMaximumCacheSize ( uInt howManyPixels ) [virtual]

Set the maximum (allowed) cache size as indicated.

Reimplemented from casa::LatticeBase.

virtual Bool casa::MIRIADImage::setMiscInfo ( const RecordInterface & newInfo ) [virtual]