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Support FITS files with distortion maps when given as file name #477

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Support FITS files with distortion maps when given as file name #477

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Binary file added reproject/tests/data/image_with_distortion_map.fits
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7 changes: 7 additions & 0 deletions reproject/tests/test_utils.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@
import numpy as np
import pytest
from astropy.io import fits
from astropy.utils.data import get_pkg_data_filename
from astropy.wcs import WCS

from reproject.conftest import set_wcs_array_shape
Expand Down Expand Up @@ -41,6 +42,12 @@ def test_parse_input_data_missing_hdu_in():
parse_input_data(hdulist)


def test_parse_input_data_distortion_map():
# Verify that the file can be successfully loaded and parsed
fname = get_pkg_data_filename("data/image_with_distortion_map.fits", package="reproject.tests")
parse_input_data(fname, hdu_in=0)


@pytest.mark.filterwarnings("ignore:unclosed file:ResourceWarning")
def test_parse_input_shape(tmpdir, valid_celestial_input_shapes):
"""
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6 changes: 3 additions & 3 deletions reproject/utils.py
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Original file line number Diff line number Diff line change
Expand Up @@ -92,7 +92,7 @@ def hdu_to_numpy_memmap(hdu):
)


def parse_input_data(input_data, hdu_in=None):
def parse_input_data(input_data, hdu_in=None, source_hdul=None):
"""
Parse input data to return a Numpy array and WCS object.
"""
Expand All @@ -109,9 +109,9 @@ def parse_input_data(input_data, hdu_in=None):
)
else:
hdu_in = 0
return parse_input_data(input_data[hdu_in])
return parse_input_data(input_data[hdu_in], source_hdul=input_data)
elif isinstance(input_data, PrimaryHDU | ImageHDU | CompImageHDU):
return hdu_to_numpy_memmap(input_data), WCS(input_data.header)
return (hdu_to_numpy_memmap(input_data), WCS(input_data.header, fobj=source_hdul))
elif isinstance(input_data, tuple) and isinstance(input_data[0], np.ndarray | da.core.Array):
if isinstance(input_data[1], Header):
return input_data[0], WCS(input_data[1])
Expand Down
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