def test_nan_oetf_inverse_BT709(self):
"""
Tests :func:`colour.models.rgb.transfer_functions.itur_bt_709.\
oetf_inverse_BT709` definition nan support.
"""
oetf_inverse_BT709(np.array([-1.0, 0.0, 1.0, -np.inf, np.inf, np.nan]))
def test_domain_range_scale_oetf_inverse_BT709(self):
"""
Tests :func:`colour.models.rgb.transfer_functions.itur_bt_709.\
oetf_inverse_BT709` definition domain and range scale support.
"""
V = 0.409007728864150
L = oetf_inverse_BT709(V)
d_r = (('reference', 1), (1, 1), (100, 100))
for scale, factor in d_r:
with domain_range_scale(scale):
np.testing.assert_almost_equal(oetf_inverse_BT709(V * factor),
L * factor,
decimal=7)
def test_oetf_inverse_BT709(self):
"""
Tests :func:`colour.models.rgb.transfer_functions.itur_bt_709.\
oetf_inverse_BT709` definition.
"""
self.assertAlmostEqual(oetf_inverse_BT709(0.0), 0.0, places=7)
self.assertAlmostEqual(oetf_inverse_BT709(0.067500000000000),
0.015,
places=7)
self.assertAlmostEqual(oetf_inverse_BT709(0.409007728864150),
0.18,
places=7)
self.assertAlmostEqual(oetf_inverse_BT709(1.0), 1.0, places=7)
def test_n_dimensional_oetf_inverse_BT709(self):
"""
Tests :func:`colour.models.rgb.transfer_functions.itur_bt_709.\
oetf_inverse_BT709` definition n-dimensional arrays support.
"""
V = 0.409007728864150
L = oetf_inverse_BT709(V)
V = np.tile(V, 6)
L = np.tile(L, 6)
np.testing.assert_almost_equal(oetf_inverse_BT709(V), L, decimal=7)
V = np.reshape(V, (2, 3))
L = np.reshape(L, (2, 3))
np.testing.assert_almost_equal(oetf_inverse_BT709(V), L, decimal=7)
V = np.reshape(V, (2, 3, 1))
L = np.reshape(L, (2, 3, 1))
np.testing.assert_almost_equal(oetf_inverse_BT709(V), L, decimal=7)