/usr/lib/python3/dist-packages/photutils/detection/tests/test_findstars.py is in python3-photutils 0.3-3.
This file is owned by root:root, with mode 0o644.
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from __future__ import (absolute_import, division, print_function,
unicode_literals)
import os.path as op
import itertools
import warnings
import numpy as np
from numpy.testing import assert_allclose
from astropy.tests.helper import pytest, catch_warnings
from astropy.table import Table
from astropy.utils.exceptions import AstropyUserWarning
from astropy.utils.exceptions import AstropyDeprecationWarning
from ..findstars import daofind, irafstarfind
from ..findstars import DAOStarFinder, IRAFStarFinder
from ...datasets import make_100gaussians_image
try:
import scipy
HAS_SCIPY = True
except ImportError:
HAS_SCIPY = False
try:
import skimage
HAS_SKIMAGE = True
except ImportError:
HAS_SKIMAGE = False
DATA = make_100gaussians_image()
THRESHOLDS = [8.0, 10.0]
FWHMS = [1.0, 1.5, 2.0]
warnings.simplefilter('always', AstropyUserWarning)
@pytest.mark.skipif('not HAS_SCIPY')
@pytest.mark.skipif('not HAS_SKIMAGE')
class TestDAOStarFinder(object):
@pytest.mark.parametrize(('threshold', 'fwhm'),
list(itertools.product(THRESHOLDS, FWHMS)))
def test_daofind(self, threshold, fwhm):
starfinder = DAOStarFinder(threshold, fwhm, sigma_radius=1.5)
t = starfinder(DATA)
datafn = ('daofind_test_thresh{0:04.1f}_fwhm{1:04.1f}'
'.txt'.format(threshold, fwhm))
datafn = op.join(op.dirname(op.abspath(__file__)), 'data', datafn)
t_ref = Table.read(datafn, format='ascii')
assert_allclose(np.array(t).astype(np.float),
np.array(t_ref).astype(np.float))
# test for the deprecated daofind
@pytest.mark.parametrize(('threshold', 'fwhm'),
list(itertools.product(THRESHOLDS, FWHMS)))
def test_dep_daofind(self, threshold, fwhm):
with catch_warnings(AstropyDeprecationWarning):
t = daofind(DATA, threshold, fwhm, sigma_radius=1.5)
datafn = ('daofind_test_thresh{0:04.1f}_fwhm{1:04.1f}'
'.txt'.format(threshold, fwhm))
datafn = op.join(op.dirname(op.abspath(__file__)), 'data', datafn)
t_ref = Table.read(datafn, format='ascii')
assert_allclose(np.array(t).astype(np.float),
np.array(t_ref).astype(np.float))
def test_daofind_include_border(self):
starfinder = DAOStarFinder(threshold=10, fwhm=2, sigma_radius=1.5,
exclude_border=False)
t = starfinder(DATA)
assert len(t) == 20
# test for the deprecated daofind
def test_dep_daofind_include_border(self):
with catch_warnings(AstropyDeprecationWarning):
t = daofind(DATA, threshold=10, fwhm=2, sigma_radius=1.5,
exclude_border=False)
assert len(t) == 20
def test_daofind_exclude_border(self):
starfinder = DAOStarFinder(threshold=10, fwhm=2, sigma_radius=1.5,
exclude_border=True)
t = starfinder(DATA)
assert len(t) == 19
# test for the deprecated daofind
def test_dep_daofind_exclude_border(self):
with catch_warnings(AstropyDeprecationWarning):
t = daofind(DATA, threshold=10, fwhm=2, sigma_radius=1.5,
exclude_border=True)
assert len(t) == 19
def test_daofind_nosources(self):
data = np.ones((3, 3))
starfinder = DAOStarFinder(threshold=10, fwhm=1)
t = starfinder(data)
assert len(t) == 0
# test for the deprecated daofind
def test_dep_daofind_nosources(self):
data = np.ones((3, 3))
with catch_warnings(AstropyDeprecationWarning):
t = daofind(data, threshold=10, fwhm=1)
assert len(t) == 0
def test_daofind_sharpness(self):
"""Sources found, but none pass the sharpness criteria."""
starfinder = DAOStarFinder(threshold=50, fwhm=1.0, sharplo=1.)
t = starfinder(DATA)
assert len(t) == 0
# test for the deprecated daofind
def test_dep_daofind_sharpness(self):
"""Sources found, but none pass the sharpness criteria."""
with catch_warnings(AstropyDeprecationWarning):
t = daofind(DATA, threshold=50, fwhm=1.0, sharplo=1.)
assert len(t) == 0
def test_daofind_roundness(self):
"""Sources found, but none pass the roundness criteria."""
starfinder = DAOStarFinder(threshold=50, fwhm=1.0, roundlo=1.)
t = starfinder(DATA)
assert len(t) == 0
# test for the deprecated daofind
def test_dep_daofind_roundness(self):
"""Sources found, but none pass the roundness criteria."""
with catch_warnings(AstropyDeprecationWarning):
t = daofind(DATA, threshold=50, fwhm=1.0, roundlo=1.)
assert len(t) == 0
def test_daofind_flux_negative(self):
"""Test handling of negative flux (here created by large sky)."""
data = np.ones((5, 5))
data[2, 2] = 10.
starfinder = DAOStarFinder(threshold=0.1, fwhm=1.0, sky=10)
t = starfinder(data)
assert not np.isfinite(t['mag'])
# test for the deprecated daofind
def test_dep_daofind_flux_negative(self):
"""Test handling of negative flux (here created by large sky)."""
data = np.ones((5, 5))
data[2, 2] = 10.
with catch_warnings(AstropyDeprecationWarning):
t = daofind(data, threshold=0.1, fwhm=1.0, sky=10)
assert not np.isfinite(t['mag'])
@pytest.mark.skipif('not HAS_SCIPY')
@pytest.mark.skipif('not HAS_SKIMAGE')
class TestIRAFStarFinder(object):
@pytest.mark.parametrize(('threshold', 'fwhm'),
list(itertools.product(THRESHOLDS, FWHMS)))
def test_irafstarfind(self, threshold, fwhm):
starfinder = IRAFStarFinder(threshold, fwhm, sigma_radius=1.5)
t = starfinder(DATA)
datafn = ('irafstarfind_test_thresh{0:04.1f}_fwhm{1:04.1f}'
'.txt'.format(threshold, fwhm))
datafn = op.join(op.dirname(op.abspath(__file__)), 'data', datafn)
t_ref = Table.read(datafn, format='ascii')
assert_allclose(np.array(t).astype(np.float),
np.array(t_ref).astype(np.float))
# test for the deprecated irafstarfind
@pytest.mark.parametrize(('threshold', 'fwhm'),
list(itertools.product(THRESHOLDS, FWHMS)))
def test_dep_irafstarfind(self, threshold, fwhm):
with catch_warnings(AstropyDeprecationWarning):
t = irafstarfind(DATA, threshold, fwhm, sigma_radius=1.5)
datafn = ('irafstarfind_test_thresh{0:04.1f}_fwhm{1:04.1f}'
'.txt'.format(threshold, fwhm))
datafn = op.join(op.dirname(op.abspath(__file__)), 'data', datafn)
t_ref = Table.read(datafn, format='ascii')
assert_allclose(np.array(t).astype(np.float),
np.array(t_ref).astype(np.float))
def test_irafstarfind_nosources(self):
data = np.ones((3, 3))
starfinder = IRAFStarFinder(threshold=10, fwhm=1)
t = starfinder(data)
assert len(t) == 0
# test for the deprecated irafstarfind
def test_dep_irafstarfind_nosources(self):
data = np.ones((3, 3))
with catch_warnings(AstropyDeprecationWarning):
t = irafstarfind(data, threshold=10, fwhm=1)
assert len(t) == 0
def test_irafstarfind_sharpness(self):
"""Sources found, but none pass the sharpness criteria."""
starfinder = IRAFStarFinder(threshold=50, fwhm=1.0, sharplo=2.)
t = starfinder(DATA)
assert len(t) == 0
# test for the deprecated irafstarfind
def test_dep_irafstarfind_sharpness(self):
"""Sources found, but none pass the sharpness criteria."""
with catch_warnings(AstropyDeprecationWarning):
t = irafstarfind(DATA, threshold=50, fwhm=1.0, sharplo=2.)
assert len(t) == 0
def test_irafstarfind_roundness(self):
"""Sources found, but none pass the roundness criteria."""
starfinder = IRAFStarFinder(threshold=50, fwhm=1.0, roundlo=1.)
t = starfinder(DATA)
assert len(t) == 0
# test for the deprecated irafstarfind
def test_dep_irafstarfind_roundness(self):
"""Sources found, but none pass the roundness criteria."""
with catch_warnings(AstropyDeprecationWarning):
t = irafstarfind(DATA, threshold=50, fwhm=1.0, roundlo=1.)
assert len(t) == 0
def test_irafstarfind_sky(self):
starfinder = IRAFStarFinder(threshold=25.0, fwhm=2.0, sky=10.)
t = starfinder(DATA)
assert len(t) == 4
# test for the deprecated irafstarfind
def test_dep_irafstarfind_sky(self):
with catch_warnings(AstropyDeprecationWarning):
t = irafstarfind(DATA, threshold=25.0, fwhm=2.0, sky=10.)
assert len(t) == 4
def test_irafstarfind_largesky(self):
starfinder = IRAFStarFinder(threshold=25.0, fwhm=2.0, sky=100.)
t = starfinder(DATA)
assert len(t) == 0
# test for the deprecated irafstarfind
def test_dep_irafstarfind_largesky(self):
with catch_warnings(AstropyDeprecationWarning):
t = irafstarfind(DATA, threshold=25.0, fwhm=2.0, sky=100.)
assert len(t) == 0
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