NDData Adapters¶
Astroimtools provides some very basic tools for interfacing
NDData
objects with FITS files.
Getting Started¶
basic_nddata_to_fits¶
The basic_nddata_to_fits()
function writes a NDData
object to a FITS file.
The NDData
data values will be saved in an FITS
extension called ‘SCI’. This simple writer will also attempt to save
the NDData
uncertainty and mask to a FITS ‘ERROR’
and ‘MASK’ extension, respectively.
If present, the NDData
meta dictionary will be
stored as the FITS header.
Here’s a simple example:
>>> from astroimtools import basic_nddata_to_fits
>>> from astropy.nddata import NDData
>>> nd = NDData(np.random.random((500, 500)
>>> basic_nddata_to_fits(nd, 'example_data.fits')
Set the clobber
keyword to True
to overwrite any existing files:
>>> basic_nddata_to_fits(nd, 'example_data.fits', clobber=True)
basic_fits_to_nddata¶
The basic_fits_to_nddata()
function reads a single FITS extension into a NDData
object. The extension to read is set via the exten
keyword, which
defaults to 0.
Here’s a simple example:
>>> from astroimtools import basic_fits_to_nddata
>>> nddata = basic_fits_to_nddata('example_data.fits', exten=0)
The data from the FITS extension are in nddata.data
and the header
values are in nddata.meta
. Note that the primary FITS header is
always included in resulting NDData
meta dict
,
regardless of the value of exten
.
Reference/API¶
NDData tools for interfacing with FITS files.
Functions¶
|
Read a single FITS extension into a |
|
Write a |