#include <SkyComponentFactory.h>

Public Types
typedef casacore::GaussianBeam	Angular2DGaussian

Static Public Member Functions
static SkyComponent	encodeSkyComponent (casacore::LogIO &os, casacore::Double &facToJy, const casacore::CoordinateSystem &cSys, const casacore::Unit &brightnessUnit, ComponentType::Shape type, const casacore::Vector< casacore::Double > &parameters, casacore::Stokes::StokesTypes stokes, casacore::Bool xIsLong, const casacore::GaussianBeam &beam)
	These functions convert between a vector of doubles holding SkyComponent values (the output from SkyComponent::toPixel) and a SkyComponent. More...

template<class T >
static SkyComponent	encodeSkyComponent (casacore::LogIO &os, casacore::Double &fluxRatio, const casacore::ImageInterface< T > &im, casa::ComponentType::Shape modelType, const casacore::Vector< casacore::Double > &parameters, casacore::Stokes::StokesTypes stokes, casacore::Bool xIsLong, casacore::Bool deconvolveIt, const casacore::GaussianBeam &beam)
	for some reason, this method was in ImageAnalysis but also belongs here. More...

static SkyComponent	deconvolveSkyComponent (casacore::LogIO &os, const SkyComponent &skyIn, const casacore::GaussianBeam &beam)
	Deconvolve SkyComponent from beam moved from ImageAnalysis. More...

static casacore::Vector < casacore::Double >	decodeSkyComponent (const SkyComponent &sky, const casacore::ImageInfo &ii, const casacore::CoordinateSystem &cSys, const casacore::Unit &brightnessUnit, casacore::Stokes::StokesTypes stokes, casacore::Bool xIsLong)
	moved from ImageAnalysis. More...

static void	worldWidthsToPixel (casacore::Vector< casacore::Double > &dParameters, const casacore::Vector< casacore::Quantum< casacore::Double > > &parameters, const casacore::CoordinateSystem &cSys, const casacore::IPosition &pixelAxes, casacore::Bool doRef=false)
	Convert 2d shape from world (world parameters=x, y, major axis, minor axis, position angle) to pixel (major, minor, pa). More...

static casacore::Bool	pixelWidthsToWorld (casacore::GaussianBeam &wParameters, const casacore::Vector< casacore::Double > &pParameters, const casacore::CoordinateSystem &cSys, const casacore::IPosition &pixelAxes, casacore::Bool doRef=false)
	Convert 2d shape from pixels (parameters=x,y, major axis, minor axis, position angle) to world (major, minor, pa) at specified location. More...

Static Private Member Functions
static casacore::Bool	_skyPixelWidthsToWorld (Angular2DGaussian &gauss2d, const casacore::CoordinateSystem &cSys, const casacore::Vector< casacore::Double > &pParameters, const casacore::IPosition &pixelAxes, casacore::Bool doRef)
	Convert 2d sky shape (parameters=major axis, minor axis, position angle) from pixels to world at reference pixel. More...

static casacore::Double	_worldWidthToPixel (casacore::Double positionAngle, const casacore::Quantum< casacore::Double > &length, const casacore::CoordinateSystem &cSys, const casacore::IPosition &pixelAxes)
	Convert a length and position angle in world units (for a non-coupled coordinate) to pixels. More...

static casacore::Quantum < casacore::Double >	_pixelWidthToWorld (casacore::Double positionAngle, casacore::Double length, const casacore::CoordinateSystem &cSys, const casacore::IPosition &pixelAxes)

Detailed Description

Definition at line 42 of file SkyComponentFactory.h.

Member Typedef Documentation

typedef casacore::GaussianBeam casa::SkyComponentFactory::Angular2DGaussian

Definition at line 45 of file SkyComponentFactory.h.

Member Function Documentation

static casacore::Quantum<casacore::Double> casa::SkyComponentFactory::_pixelWidthToWorld	(	casacore::Double	positionAngle,
		casacore::Double	length,
		const casacore::CoordinateSystem &	cSys,
		const casacore::IPosition &	pixelAxes
	)

staticprivate

static casacore::Bool casa::SkyComponentFactory::_skyPixelWidthsToWorld	(	Angular2DGaussian &	gauss2d,
		const casacore::CoordinateSystem &	cSys,
		const casacore::Vector< casacore::Double > &	pParameters,
		const casacore::IPosition &	pixelAxes,
		casacore::Bool	doRef
	)

staticprivate

Convert 2d sky shape (parameters=major axis, minor axis, position angle) from pixels to world at reference pixel.

pixelAxes describes which 2 pixel axes of the coordinate system our 2D shape is in. On input pa is positive for +x -> +y in pixel frame On output pa is positive N->E Returns true if major/minor exchanged themselves on conversion to world.

static casacore::Double casa::SkyComponentFactory::_worldWidthToPixel	(	casacore::Double	positionAngle,
		const casacore::Quantum< casacore::Double > &	length,
		const casacore::CoordinateSystem &	cSys,
		const casacore::IPosition &	pixelAxes
	)

staticprivate

Convert a length and position angle in world units (for a non-coupled coordinate) to pixels.

The length is in some 2D plane in the casacore::CoordinateSystem specified by pixelAxes.

static casacore::Vector<casacore::Double> casa::SkyComponentFactory::decodeSkyComponent	(	const SkyComponent &	sky,
		const casacore::ImageInfo &	ii,
		const casacore::CoordinateSystem &	cSys,
		const casacore::Unit &	brightnessUnit,
		casacore::Stokes::StokesTypes	stokes,
		casacore::Bool	xIsLong
	)

static

moved from ImageAnalysis.

this needs to be moved to a more appropriate class at some point

static SkyComponent casa::SkyComponentFactory::deconvolveSkyComponent	(	casacore::LogIO &	os,
		const SkyComponent &	skyIn,
		const casacore::GaussianBeam &	beam
	)

static

Deconvolve SkyComponent from beam moved from ImageAnalysis.

this needs to be moved to a more appropriate class at some point

static SkyComponent casa::SkyComponentFactory::encodeSkyComponent	(	casacore::LogIO &	os,
		casacore::Double &	facToJy,
		const casacore::CoordinateSystem &	cSys,
		const casacore::Unit &	brightnessUnit,
		ComponentType::Shape	type,
		const casacore::Vector< casacore::Double > &	parameters,
		casacore::Stokes::StokesTypes	stokes,
		casacore::Bool	xIsLong,
		const casacore::GaussianBeam &	beam
	)

static

These functions convert between a vector of doubles holding SkyComponent values (the output from SkyComponent::toPixel) and a SkyComponent.

The coordinate values are in the 'x' and 'y' frames. It is possible that the x and y axes of the pixel array are lat/long (xIsLong=false) rather than long/lat. facToJy converts the brightness units from whatevers per whatever to Jy per whatever (e.g. mJy/beam to Jy/beam). It is unity if it can't be done and you get a warning. In the SkyComponent the flux is integral. In the parameters vector it is peak.

pars(0) = FLux image units (e.g. Jy/beam). pars(1) = x cen abs pix pars(2) = y cen abs pix pars(3) = major pix pars(4) = minor pix pars(5) = pa radians (pos +x -> +y)

5 values for ComponentType::Gaussian, CT::Disk. 3 values for CT::Point.

template<class T >

static SkyComponent casa::SkyComponentFactory::encodeSkyComponent	(	casacore::LogIO &	os,
		casacore::Double &	fluxRatio,
		const casacore::ImageInterface< T > &	im,
		casa::ComponentType::Shape	modelType,
		const casacore::Vector< casacore::Double > &	parameters,
		casacore::Stokes::StokesTypes	stokes,
		casacore::Bool	xIsLong,
		casacore::Bool	deconvolveIt,
		const casacore::GaussianBeam &	beam
	)

static

for some reason, this method was in ImageAnalysis but also belongs here.

Obviously hugely confusing to have to methods with the same name and which presumably are for the same thing in two different classes. I'm moving ImageAnalysis' method here and also moving that implamentation to here as well and also being consistent regarding callers (ie those that called the ImageAnalysis method will now call this method). I couldn't tell you which of the two implementations is the better one to use for new code, but this version does call the version that already existed in casacore::ImageUtilities, so this version seems to do a bit more. I also hate having a class with anything like Utilities in the name, but I needed to move this somewhere and can only tackle one issue at a time.

static casacore::Bool casa::SkyComponentFactory::pixelWidthsToWorld	(	casacore::GaussianBeam &	wParameters,
		const casacore::Vector< casacore::Double > &	pParameters,
		const casacore::CoordinateSystem &	cSys,
		const casacore::IPosition &	pixelAxes,
		casacore::Bool	doRef = `false`
	)

static

Convert 2d shape from pixels (parameters=x,y, major axis, minor axis, position angle) to world (major, minor, pa) at specified location.

pixelAxes describes which 2 pixel axes of the coordinate system our 2D shape is in. If doRef is true, then x and y are taken from the reference pixel rather than the paraneters vector.

On input pa is positive for +x -> +y in pixel frame On output pa is positive N->E Returns true if major/minor exchanged themselves on conversion to world.

static void casa::SkyComponentFactory::worldWidthsToPixel	(	casacore::Vector< casacore::Double > &	dParameters,
		const casacore::Vector< casacore::Quantum< casacore::Double > > &	parameters,
		const casacore::CoordinateSystem &	cSys,
		const casacore::IPosition &	pixelAxes,
		casacore::Bool	doRef = `false`
	)

static

Convert 2d shape from world (world parameters=x, y, major axis, minor axis, position angle) to pixel (major, minor, pa).

Can handle quantum units 'pix'. If one width is in pixel units both must be in pixel units. pixelAxes describes which 2 pixel axes of the coordinate system our 2D shape is in. If axes are not from the same coordinate type units must be pixels. If doRef is true, then x and y are taken from the reference value rather than the parameters vector.

On input, pa is N->E (at ref pix) for celestial planes. Otherwise pa is in pixel coordinate system +x -> +y On output, pa (radians) is positive +x -> +y in pixel frame

Referenced by casa::DisplayCoordinateSystem::worldWidthsToPixel().

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

casa/code/components/ComponentModels/SkyComponentFactory.h

Public Types

Static Public Member Functions

Static Private Member Functions

Detailed Description

Member Typedef Documentation

Member Function Documentation