def test_domain_range_scale_RGB_to_CMY(self):
"""
Test :func:`colour.models.rgb.cmyk.RGB_to_CMY` definition domain and
range scale support.
"""
RGB = np.array([0.45620519, 0.03081071, 0.04091952])
CMY = RGB_to_CMY(RGB)
d_r = (("reference", 1), ("1", 1), ("100", 100))
for scale, factor in d_r:
with domain_range_scale(scale):
np.testing.assert_almost_equal(RGB_to_CMY(RGB * factor),
CMY * factor,
decimal=7)
def test_n_dimensional_RGB_to_CMY(self):
"""
Test :func:`colour.models.rgb.cmyk.RGB_to_CMY` definition
n-dimensional arrays support.
"""
RGB = np.array([0.45620519, 0.03081071, 0.04091952])
CMY = RGB_to_CMY(RGB)
RGB = np.tile(RGB, (6, 1))
CMY = np.tile(CMY, (6, 1))
np.testing.assert_almost_equal(RGB_to_CMY(RGB), CMY, decimal=7)
RGB = np.reshape(RGB, (2, 3, 3))
CMY = np.reshape(CMY, (2, 3, 3))
np.testing.assert_almost_equal(RGB_to_CMY(RGB), CMY, decimal=7)
def test_RGB_to_CMY(self):
"""
Tests :func:`colour.models.rgb.cmyk.RGB_to_CMY` definition.
"""
np.testing.assert_almost_equal(
RGB_to_CMY(np.array([0.45620519, 0.03081071, 0.04091952])),
np.array([0.54379481, 0.96918929, 0.95908048]),
decimal=7)
np.testing.assert_almost_equal(
RGB_to_CMY(np.array([0.00000000, 0.00000000, 0.00000000])),
np.array([1.00000000, 1.00000000, 1.00000000]),
decimal=7)
np.testing.assert_almost_equal(
RGB_to_CMY(np.array([1.00000000, 1.00000000, 1.00000000])),
np.array([0.00000000, 0.00000000, 0.00000000]),
decimal=7)
def test_nan_RGB_to_CMY(self):
"""
Test :func:`colour.models.rgb.cmyk.RGB_to_CMY` definition nan
support.
"""
cases = [-1.0, 0.0, 1.0, -np.inf, np.inf, np.nan]
cases = set(permutations(cases * 3, r=3))
for case in cases:
RGB = np.array(case)
RGB_to_CMY(RGB)