A FITS reader class for regular Images. More...

#include <ImageFitsReader.h>

Inheritance diagram for lsst::afw::image::ImageFitsReader:

Public Member Functions
template<typename PixelT>
Image< PixelT >	read (lsst::geom::Box2I const &bbox=lsst::geom::Box2I(), ImageOrigin origin=PARENT, bool allowUnsafe=false)
	Read the Image.
	ImageBaseFitsReader (std::string const &fileName, int hdu=fits::DEFAULT_HDU)
	Construct a FITS reader object.
	ImageBaseFitsReader (fits::MemFileManager &manager, int hdu=fits::DEFAULT_HDU)
	Construct a FITS reader object.
	ImageBaseFitsReader (fits::Fits *fitsFile)
	Construct a FITS reader object.
	ImageBaseFitsReader (ImageBaseFitsReader const &)=delete
	ImageBaseFitsReader (ImageBaseFitsReader &&)=delete
std::string	readDType () const
	Read a string describing the pixel type of the on-disk image.
lsst::geom::Box2I	readBBox (ImageOrigin origin=PARENT)
	Read the bounding box of the on-disk image.
lsst::geom::Point2I	readXY0 (lsst::geom::Box2I const &bbox=lsst::geom::Box2I(), ImageOrigin origin=PARENT)
	Read the image origin from the on-disk image or a subimage thereof.
std::shared_ptr< daf::base::PropertyList >	readMetadata ()
	Read the image's FITS header.
template<typename T>
ndarray::Array< T, 2, 2 >	readArray (lsst::geom::Box2I const &bbox, ImageOrigin origin=PARENT, bool allowUnsafe=false)
	Read the image's data array.
int	getHdu () const noexcept
	Return the HDU this reader targets.
std::string	getFileName () const
	Return the name of the file this reader targets.

Detailed Description

A FITS reader class for regular Images.

Exception Safety: All ImageFitsReader methods provide strong exception safety, but exceptions thrown by the internal fits::Fits object itself may change its status variable or HDU pointer; ImageFitsReader guards against this by resetting those before any use of the Fits object.

Definition at line 39 of file ImageFitsReader.h.

Member Function Documentation

◆ getFileName()

std::string lsst::afw::image::ImageBaseFitsReader::getFileName ( ) const

inlineinherited

Return the name of the file this reader targets.

Definition at line 141 of file ImageBaseFitsReader.h.

◆ getHdu()

int lsst::afw::image::ImageBaseFitsReader::getHdu ( ) const

inlinenoexceptinherited

Return the HDU this reader targets.

Definition at line 136 of file ImageBaseFitsReader.h.

◆ ImageBaseFitsReader() [1/5]

lsst::afw::image::ImageBaseFitsReader::ImageBaseFitsReader ( fits::Fits * fitsFile )

explicit

Construct a FITS reader object.

Parameters

fitsFile Pointer to a CFITSIO file object. Lifetime will not be managed by the Reader object.

Definition at line 74 of file ImageBaseFitsReader.cc.

◆ ImageBaseFitsReader() [2/5]

lsst::afw::image::ImageBaseFitsReader::ImageBaseFitsReader	(	fits::MemFileManager &	manager,
		int	hdu = fits::DEFAULT_HDU )

explicit

Construct a FITS reader object.

Parameters

manager	Memory block containing a FITS file.
hdu	HDU index, where 0 is the primary HDU and DEFAULT_HDU is the first non-empty HDU.

Definition at line 66 of file ImageBaseFitsReader.cc.

◆ ImageBaseFitsReader() [3/5]

lsst::afw::image::ImageBaseFitsReader::ImageBaseFitsReader ( ImageBaseFitsReader && )

delete

◆ ImageBaseFitsReader() [4/5]

lsst::afw::image::ImageBaseFitsReader::ImageBaseFitsReader ( ImageBaseFitsReader const & )

delete

◆ ImageBaseFitsReader() [5/5]

lsst::afw::image::ImageBaseFitsReader::ImageBaseFitsReader	(	std::string const &	fileName,
		int	hdu = fits::DEFAULT_HDU )

explicit

Construct a FITS reader object.

Parameters

fileName	Name of a file to open.
hdu	HDU index, where 0 is the primary HDU and DEFAULT_HDU is the first non-empty HDU.

Definition at line 57 of file ImageBaseFitsReader.cc.

◆ read()

template<typename PixelT>

template Image< std::uint64_t > lsst::afw::image::ImageFitsReader::read	(	lsst::geom::Box2I const &	bbox = lsst::geom::Box2I(),
		ImageOrigin	origin = PARENT,
		bool	allowUnsafe = false )

Read the Image.

Parameters

bbox	A bounding box used to defined a subimage, or an empty box (default) to read the whole image.
origin	Coordinate system convention for the given box.
allowUnsafe	Permit reading into the requested pixel type even when on-disk values may overflow or truncate.

In Python, this templated method is wrapped with an additional dtype argument to provide the type to read. This defaults to the type of the on-disk image.

Definition at line 27 of file ImageFitsReader.cc.

◆ readArray()

template<typename T>

template ndarray::Array< std::uint64_t, 2, 2 > lsst::afw::image::ImageBaseFitsReader::readArray	(	lsst::geom::Box2I const &	bbox,
		ImageOrigin	origin = PARENT,
		bool	allowUnsafe = false )

inherited

Read the image's data array.

Parameters

bbox	A bounding box used to defined a subimage, or an empty box (default) to read the whole image.
origin	Coordinate system convention for the given box.
allowUnsafe	Permit reading into the requested pixel type even when on-disk values may overflow or truncate.

Definition at line 171 of file ImageBaseFitsReader.cc.

◆ readBBox()

lsst::geom::Box2I lsst::afw::image::ImageBaseFitsReader::readBBox ( ImageOrigin origin = PARENT )

inherited

Read the bounding box of the on-disk image.

Parameters

origin Coordinate system convention for the returned box. If LOCAL, the returned box will always have a minimum of (0, 0).

Definition at line 86 of file ImageBaseFitsReader.cc.

◆ readDType()

std::string lsst::afw::image::ImageBaseFitsReader::readDType ( ) const

inherited

Read a string describing the pixel type of the on-disk image.

Returns: A string of the form [u](int|float)<bits> (e.g. "uint16", "float64").

Definition at line 80 of file ImageBaseFitsReader.cc.

◆ readMetadata()

std::shared_ptr< daf::base::PropertyList > lsst::afw::image::ImageBaseFitsReader::readMetadata ( )

inherited

Read the image's FITS header.

Definition at line 105 of file ImageBaseFitsReader.cc.

◆ readXY0()

lsst::geom::Point2I lsst::afw::image::ImageBaseFitsReader::readXY0	(	lsst::geom::Box2I const &	bbox = lsst::geom::Box2I(),
		ImageOrigin	origin = PARENT )

inherited

Read the image origin from the on-disk image or a subimage thereof.

Parameters

bbox	A bounding box used to defined a subimage, or an empty box (default) to use the whole image.
origin	Coordinate system convention for the given box. Ignored if bbox is empty.

Definition at line 94 of file ImageBaseFitsReader.cc.

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

include/lsst/afw/image/ImageFitsReader.h
src/image/ImageFitsReader.cc

Public Member Functions

Detailed Description

Member Function Documentation

◆ getFileName()

◆ getHdu()

◆ ImageBaseFitsReader() [1/5]

◆ ImageBaseFitsReader() [2/5]

◆ ImageBaseFitsReader() [3/5]

◆ ImageBaseFitsReader() [4/5]

◆ ImageBaseFitsReader() [5/5]

◆ read()

◆ readArray()

◆ readBBox()

◆ readDType()

◆ readMetadata()

◆ readXY0()