A Psf class that maps an arbitrary Psf through a coordinate transformation. More...

#include <WarpedPsf.h>

Inheritance diagram for lsst::meas::algorithms::WarpedPsf:

Public Types
enum	ImageOwnerEnum

typedef math::Kernel::Pixel	Pixel

typedef image::Image< Pixel >	Image

Public Member Functions
	WarpedPsf (boost::shared_ptr< afw::detection::Psf const > undistortedPsf, boost::shared_ptr< afw::geom::TransformPoint2ToPoint2 const > distortion, boost::shared_ptr< afw::math::WarpingControl const > control)
	Construct WarpedPsf from unwarped psf and distortion. More...

	WarpedPsf (boost::shared_ptr< afw::detection::Psf const > undistortedPsf, boost::shared_ptr< afw::geom::TransformPoint2ToPoint2 const > distortion, std::string const &kernelName="lanczos3", unsigned int cache=10000)

virtual geom::Point2D	getAveragePosition () const
	Return the average of the positions of the stars that went into this Psf. More...

virtual boost::shared_ptr< afw::detection::Psf >	clone () const
	Polymorphic deep copy. Usually unnecessary, as Psfs are immutable. More...

virtual boost::shared_ptr< afw::detection::Psf >	resized (int width, int height) const
	Return a clone with specified kernel dimensions. More...

std::shared_ptr< typehandling::Storable >	cloneStorable () const override final

std::shared_ptr< Image >	computeImage (lsst::geom::Point2D position=makeNullPoint(), image::Color color=image::Color(), ImageOwnerEnum owner=COPY) const

std::shared_ptr< Image >	computeKernelImage (lsst::geom::Point2D position=makeNullPoint(), image::Color color=image::Color(), ImageOwnerEnum owner=COPY) const

double	computePeak (lsst::geom::Point2D position=makeNullPoint(), image::Color color=image::Color()) const

double	computeApertureFlux (double radius, lsst::geom::Point2D position=makeNullPoint(), image::Color color=image::Color()) const

geom::ellipses::Quadrupole	computeShape (lsst::geom::Point2D position=makeNullPoint(), image::Color color=image::Color()) const

std::shared_ptr< math::Kernel const >	getLocalKernel (lsst::geom::Point2D position=makeNullPoint(), image::Color color=image::Color()) const

image::Color	getAverageColor () const

lsst::geom::Box2I	computeBBox (lsst::geom::Point2D position=makeNullPoint(), image::Color color=image::Color()) const

std::size_t	getCacheCapacity () const

void	setCacheCapacity (std::size_t capacity)

virtual std::string	toString () const

virtual std::size_t	hash_value () const

virtual bool	equals (Storable const &other) const noexcept

virtual bool	equals (Storable const &other) const noexcept

void	writeFits (std::string const &fileName, std::string const &mode="w") const

void	writeFits (fits::MemFileManager &manager, std::string const &mode="w") const

void	writeFits (fits::Fits &fitsfile) const

virtual bool	isPersistable () const noexcept

std::ostream &	operator<< (std::ostream &os, Storable const &storable)

std::ostream &	operator<< (std::ostream &os, Storable const &storable)

Static Public Member Functions
static std::shared_ptr< ImagePsf >	readFits (fits::Fits &fitsfile)

static std::shared_ptr< ImagePsf >	readFits (std::string const &fileName, int hdu=fits::DEFAULT_HDU)

static std::shared_ptr< ImagePsf >	readFits (fits::MemFileManager &manager, int hdu=fits::DEFAULT_HDU)

static std::shared_ptr< Psf >	readFits (fits::Fits &fitsfile)

static std::shared_ptr< Psf >	readFits (std::string const &fileName, int hdu=fits::DEFAULT_HDU)

static std::shared_ptr< Psf >	readFits (fits::MemFileManager &manager, int hdu=fits::DEFAULT_HDU)

static std::shared_ptr< Psf >	readFits (fits::Fits &fitsfile)

static std::shared_ptr< Psf >	readFits (fits::MemFileManager &manager, int hdu=fits::DEFAULT_HDU)

static std::shared_ptr< ImagePsf >	dynamicCast (std::shared_ptr< Persistable > const &ptr)

static std::shared_ptr< Psf >	dynamicCast (std::shared_ptr< Persistable > const &ptr)

static std::shared_ptr< Image >	recenterKernelImage (std::shared_ptr< Image > im, lsst::geom::Point2D const &position, std::string const &warpAlgorithm="lanczos5", unsigned int warpBuffer=5)

Public Attributes
	COPY

	INTERNAL

Protected Types
typedef io::OutputArchiveHandle	OutputArchiveHandle

Protected Member Functions
virtual boost::shared_ptr< afw::detection::Psf::Image >	doComputeKernelImage (geom::Point2D const &position, afw::image::Color const &color) const

virtual double	doComputeApertureFlux (double radius, geom::Point2D const &position, afw::image::Color const &color) const

virtual afw::geom::ellipses::Quadrupole	doComputeShape (geom::Point2D const &position, afw::image::Color const &color) const

virtual std::string	getPersistenceName () const

virtual std::string	getPythonModule () const

virtual void	write (OutputArchiveHandle &handle) const

virtual void	write (OutputArchiveHandle &handle) const

Static Protected Member Functions
static bool	singleClassEquals (T const &lhs, Storable const &rhs)

static bool	singleClassEquals (T const &lhs, Storable const &rhs)

Protected Attributes
boost::shared_ptr< afw::detection::Psf const >	_undistortedPsf

boost::shared_ptr< afw::geom::TransformPoint2ToPoint2 const >	_distortion

Detailed Description

A Psf class that maps an arbitrary Psf through a coordinate transformation.

If K_0(x,x') is the unwarped PSF, and f is the coordinate transform, then the warped PSF is defined by

K(f(x),f(x')) = K_0(x,x') (*)

We linearize the coordinate transform in the vicinity of the point where the PSF is computed. The definition (*) does not include the Jacobian of the transformation, since the afw convention is that PSF's are normalized to have integral 1 anyway.

Definition at line 50 of file WarpedPsf.h.

Constructor & Destructor Documentation

◆ WarpedPsf() [1/2]

lsst::meas::algorithms::WarpedPsf::WarpedPsf	(	boost::shared_ptr< afw::detection::Psf const >	undistortedPsf,
		boost::shared_ptr< afw::geom::TransformPoint2ToPoint2 const >	distortion,
		boost::shared_ptr< afw::math::WarpingControl const >	control
	)

Construct WarpedPsf from unwarped psf and distortion.

If p is the nominal pixel position, and p' is the true position on the sky, then our convention for the transform is that p' = distortion.applyForward(p)

Definition at line 138 of file WarpedPsf.cc.

◆ WarpedPsf() [2/2]

lsst::meas::algorithms::WarpedPsf::WarpedPsf	(	boost::shared_ptr< afw::detection::Psf const >	undistortedPsf,
		boost::shared_ptr< afw::geom::TransformPoint2ToPoint2 const >	distortion,
		std::string const &	kernelName = `"lanczos3"`,
		unsigned int	cache = `10000`
	)

Definition at line 148 of file WarpedPsf.cc.

Member Function Documentation

◆ clone()

boost::shared_ptr< afw::detection::Psf > lsst::meas::algorithms::WarpedPsf::clone ( void ) const

virtual

Polymorphic deep copy. Usually unnecessary, as Psfs are immutable.

Implements lsst::afw::detection::Psf.

Definition at line 176 of file WarpedPsf.cc.

◆ doComputeApertureFlux()

double lsst::meas::algorithms::ImagePsf::doComputeApertureFlux	(	double	radius,
		geom::Point2D const &	position,
		afw::image::Color const &	color
	)		const

protectedvirtualinherited

Definition at line 45 of file ImagePsf.cc.

◆ doComputeKernelImage()

boost::shared_ptr< afw::detection::Psf::Image > lsst::meas::algorithms::WarpedPsf::doComputeKernelImage	(	geom::Point2D const &	position,
		afw::image::Color const &	color
	)		const

protectedvirtual

Definition at line 188 of file WarpedPsf.cc.

◆ doComputeShape()

afw::geom::ellipses::Quadrupole lsst::meas::algorithms::ImagePsf::doComputeShape	(	geom::Point2D const &	position,
		afw::image::Color const &	color
	)		const

protectedvirtualinherited

Definition at line 56 of file ImagePsf.cc.

◆ getAveragePosition()

geom::Point2D lsst::meas::algorithms::WarpedPsf::getAveragePosition ( ) const

virtual

Return the average of the positions of the stars that went into this Psf.

For WarpedPsf, this is just the transform of the undistorted Psf's average position.

Reimplemented from lsst::afw::detection::Psf.

Definition at line 172 of file WarpedPsf.cc.

◆ resized()

boost::shared_ptr< afw::detection::Psf > lsst::meas::algorithms::WarpedPsf::resized	(	int	width,
		int	height
	)		const

virtual

Return a clone with specified kernel dimensions.

Implements lsst::afw::detection::Psf.

Definition at line 180 of file WarpedPsf.cc.

Member Data Documentation

◆ _distortion

boost::shared_ptr< afw::geom::TransformPoint2ToPoint2 const > lsst::meas::algorithms::WarpedPsf::_distortion

protected

Definition at line 84 of file WarpedPsf.h.

◆ _undistortedPsf

boost::shared_ptr< afw::detection::Psf const > lsst::meas::algorithms::WarpedPsf::_undistortedPsf

protected

Definition at line 83 of file WarpedPsf.h.

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

include/lsst/meas/algorithms/WarpedPsf.h
src/WarpedPsf.cc

Public Types

Public Member Functions

Static Public Member Functions

Public Attributes

Protected Types

Protected Member Functions

Static Protected Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

◆ WarpedPsf() [1/2]

◆ WarpedPsf() [2/2]

Member Function Documentation

◆ clone()

◆ doComputeApertureFlux()

◆ doComputeKernelImage()

◆ doComputeShape()

◆ getAveragePosition()

◆ resized()

Member Data Documentation

◆ _distortion

◆ _undistortedPsf