lsst.afw  22.0.1-29-g184b6e44e+8b185d4e2d
Public Member Functions | List of all members
lsst::afw::image::ImageFitsReader Class Referencefinal

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

#include <ImageFitsReader.h>

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

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. More...
 
 ImageBaseFitsReader (std::string const &fileName, int hdu=fits::DEFAULT_HDU)
 Construct a FITS reader object. More...
 
 ImageBaseFitsReader (fits::MemFileManager &manager, int hdu=fits::DEFAULT_HDU)
 Construct a FITS reader object. More...
 
 ImageBaseFitsReader (fits::Fits *fitsFile)
 Construct a FITS reader object. More...
 
 ImageBaseFitsReader (ImageBaseFitsReader const &)=delete
 
 ImageBaseFitsReader (ImageBaseFitsReader &&)=delete
 
std::string readDType () const
 Read a string describing the pixel type of the on-disk image. More...
 
lsst::geom::Box2I readBBox (ImageOrigin origin=PARENT)
 Read the bounding box of the on-disk image. More...
 
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. More...
 
std::shared_ptr< daf::base::PropertyListreadMetadata ()
 Read the image's FITS header. More...
 
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. More...
 
int getHdu () const noexcept
 Return the HDU this reader targets. More...
 
std::string getFileName () const
 Return the name of the file this reader targets. More...
 

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
explicit

Construct a FITS reader object.

Parameters
fitsFilePointer 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
explicit

Construct a FITS reader object.

Parameters
managerMemory block containing a FITS file.
hduHDU 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
delete

◆ ImageBaseFitsReader() [4/5]

lsst::afw::image::ImageBaseFitsReader::ImageBaseFitsReader
delete

◆ ImageBaseFitsReader() [5/5]

lsst::afw::image::ImageBaseFitsReader::ImageBaseFitsReader
explicit

Construct a FITS reader object.

Parameters
fileNameName of a file to open.
hduHDU 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
bboxA bounding box used to defined a subimage, or an empty box (default) to read the whole image.
originCoordinate system convention for the given box.
allowUnsafePermit 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
bboxA bounding box used to defined a subimage, or an empty box (default) to read the whole image.
originCoordinate system convention for the given box.
allowUnsafePermit 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
originCoordinate 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
bboxA bounding box used to defined a subimage, or an empty box (default) to use the whole image.
originCoordinate 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: