def test_n_dimensional_exponent_hdr_IPT(self):
"""
Tests :func:`colour.models.hdr_ipt.exponent_hdr_IPT` definition
n-dimensional arrays support.
"""
Y_s = 0.2
Y_abs = 100
epsilon = exponent_hdr_IPT(Y_s, Y_abs)
Y_s = np.tile(Y_s, 6)
Y_abs = np.tile(Y_abs, 6)
epsilon = np.tile(epsilon, 6)
np.testing.assert_almost_equal(exponent_hdr_IPT(Y_s, Y_abs),
epsilon,
decimal=7)
Y_s = np.reshape(Y_s, (2, 3))
Y_abs = np.reshape(Y_abs, (2, 3))
epsilon = np.reshape(epsilon, (2, 3))
np.testing.assert_almost_equal(exponent_hdr_IPT(Y_s, Y_abs),
epsilon,
decimal=7)
Y_s = np.reshape(Y_s, (2, 3, 1))
Y_abs = np.reshape(Y_abs, (2, 3, 1))
epsilon = np.reshape(epsilon, (2, 3, 1))
np.testing.assert_almost_equal(exponent_hdr_IPT(Y_s, Y_abs),
epsilon,
decimal=7)
def test_nan_exponent_hdr_IPT(self):
"""
Tests :func:`colour.models.hdr_ipt.exponent_hdr_IPT` definition nan
support.
"""
cases = np.array([-1.0, 0.0, 1.0, -np.inf, np.inf, np.nan])
exponent_hdr_IPT(cases, cases)
def test_domain_range_scale_exponent_hdr_IPT(self):
"""
Tests :func:`colour.models.hdr_ipt.exponent_hdr_IPT` definition domain
and range scale support.
"""
Y_s = 0.2
Y_abs = 100
epsilon = exponent_hdr_IPT(Y_s, Y_abs)
d_r = (('reference', 1), (1, 1), (100, 100))
for scale, factor in d_r:
with domain_range_scale(scale):
np.testing.assert_almost_equal(
exponent_hdr_IPT(Y_s * factor, Y_abs), epsilon, decimal=7)
def test_exponent_hdr_IPT(self):
"""
Tests :func:`colour.models.hdr_ipt.exponent_hdr_IPT`
definition.
"""
self.assertAlmostEqual(exponent_hdr_IPT(0.2, 100),
1.689138305989492,
places=7)
self.assertAlmostEqual(exponent_hdr_IPT(0.4, 100),
1.219933220992410,
places=7)
self.assertAlmostEqual(exponent_hdr_IPT(0.2, 1000),
1.126092203992995,
places=7)
def test_exponent_hdr_IPT(self):
"""
Tests :func:`colour.models.hdr_ipt.exponent_hdr_IPT` definition.
"""
self.assertAlmostEqual(
exponent_hdr_IPT(0.2, 100), 0.482020919845900, places=7)
self.assertAlmostEqual(
exponent_hdr_IPT(0.4, 100), 0.667413581325092, places=7)
self.assertAlmostEqual(
exponent_hdr_IPT(0.4, 100, method='Fairchild 2010'),
1.219933220992410,
places=7)
self.assertAlmostEqual(
exponent_hdr_IPT(0.2, 1000), 0.723031379768850, places=7)
def test_exponent_hdr_IPT(self):
"""
Tests :func:`colour.models.hdr_ipt.exponent_hdr_IPT`
definition.
"""
self.assertAlmostEqual(
exponent_hdr_IPT(0.2, 100), 0.722167826473768, places=7)
self.assertAlmostEqual(
exponent_hdr_IPT(0.4, 100), 0.521565652453277, places=7)
self.assertAlmostEqual(
exponent_hdr_IPT(0.4, 100, method='Fairchild 2010'),
1.219933220992410,
places=7)
self.assertAlmostEqual(
exponent_hdr_IPT(0.2, 1000), 0.481445217649179, places=7)
