def test_nan_oetf_BT709(self): """ Tests :func:`colour.models.rgb.transfer_functions.itur_bt_709.\ oetf_BT709` definition nan support. """ oetf_BT709(np.array([-1.0, 0.0, 1.0, -np.inf, np.inf, np.nan]))
def test_nan_oetf_BT709(self): """ Tests :func:`colour.models.rgb.transfer_functions.itur_bt_709.\ oetf_BT709` definition nan support. """ oetf_BT709(np.array([-1.0, 0.0, 1.0, -np.inf, np.inf, np.nan]))
def test_n_dimensional_oetf_BT709(self): """ Tests :func:`colour.models.rgb.transfer_functions.bt_709.\ oetf_BT709` definition n-dimensional arrays support. """ L = 0.18 V = 0.409007728864150 np.testing.assert_almost_equal( oetf_BT709(L), V, decimal=7) L = np.tile(L, 6) V = np.tile(V, 6) np.testing.assert_almost_equal( oetf_BT709(L), V, decimal=7) L = np.reshape(L, (2, 3)) V = np.reshape(V, (2, 3)) np.testing.assert_almost_equal( oetf_BT709(L), V, decimal=7) L = np.reshape(L, (2, 3, 1)) V = np.reshape(V, (2, 3, 1)) np.testing.assert_almost_equal( oetf_BT709(L), V, decimal=7)
def test_oetf_BT709(self): """ Tests :func:`colour.models.rgb.transfer_functions.bt_709.\ oetf_BT709` definition. """ self.assertAlmostEqual(oetf_BT709(0.0), 0.0, places=7) self.assertAlmostEqual(oetf_BT709(0.18), 0.409007728864150, places=7) self.assertAlmostEqual(oetf_BT709(1.0), 1.0, places=7)
def test_oetf_BT709(self): """ Tests :func:`colour.models.rgb.transfer_functions.itur_bt_709.\ oetf_BT709` definition. """ self.assertAlmostEqual(oetf_BT709(0.0), 0.0, places=7) self.assertAlmostEqual(oetf_BT709(0.015), 0.067500000000000, places=7) self.assertAlmostEqual(oetf_BT709(0.18), 0.409007728864150, places=7) self.assertAlmostEqual(oetf_BT709(1.0), 1.0, places=7)
def test_domain_range_scale_oetf_BT709(self): """ Tests :func:`colour.models.rgb.transfer_functions.itur_bt_709.\ oetf_BT709` definition domain and range scale support. """ L = 0.18 V = oetf_BT709(L) 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_BT709(L * factor), V * factor, decimal=7)
def ootf_BT2100_PQ(E): """ Defines *Recommendation ITU-R BT.2100* *Reference PQ* opto-optical transfer function (OOTF / OOCF). The OOTF maps relative scene linear light to display linear light. Parameters ---------- E : numeric or array_like :math:`E = {R_S, G_S, B_S; Y_S; or I_S}` is the signal determined by scene light and scaled by camera exposure. The values :math:`E`, :math:`R_S`, :math:`G_S`, :math:`B_S`, :math:`Y_S`, :math:`I_S` are in the range [0, 1]. Returns ------- numeric or ndarray :math:`F_D` is the luminance of a displayed linear component (:math:`R_D`, :math:`G_D`, :math:`B_D`; :math:`Y_D`; or :math:`I_D`). References ---------- - :cite:`Borer2017a` - :cite:`InternationalTelecommunicationUnion2016a` Examples -------- >>> ootf_BT2100_PQ(0.1) # doctest: +ELLIPSIS 779.9883608... """ E = np.asarray(E) return 100 * eotf_BT1886(oetf_BT709(59.5208 * E))
def test_n_dimensional_oetf_BT709(self): """ Tests :func:`colour.models.rgb.transfer_functions.itur_bt_709.\ oetf_BT709` definition n-dimensional arrays support. """ L = 0.18 V = oetf_BT709(L) L = np.tile(L, 6) V = np.tile(V, 6) np.testing.assert_almost_equal(oetf_BT709(L), V, decimal=7) L = np.reshape(L, (2, 3)) V = np.reshape(V, (2, 3)) np.testing.assert_almost_equal(oetf_BT709(L), V, decimal=7) L = np.reshape(L, (2, 3, 1)) V = np.reshape(V, (2, 3, 1)) np.testing.assert_almost_equal(oetf_BT709(L), V, decimal=7)
def ootf_BT2100_PQ(E): """ Defines *Recommendation ITU-R BT.2100* *Reference PQ* opto-optical transfer function (OOTF / OOCF). The OOTF maps relative scene linear light to display linear light. Parameters ---------- E : numeric or array_like :math:`E = {R_S, G_S, B_S; Y_S; or I_S}` is the signal determined by scene light and scaled by camera exposure. Returns ------- numeric or ndarray :math:`F_D` is the luminance of a displayed linear component (:math:`R_D`, :math:`G_D`, :math:`B_D`; :math:`Y_D`; or :math:`I_D`). Notes ----- +------------+-----------------------+---------------+ | **Domain** | **Scale - Reference** | **Scale - 1** | +============+=======================+===============+ | ``E`` | [0, 1] | [0, 1] | +------------+-----------------------+---------------+ +------------+-----------------------+---------------+ | **Range** | **Scale - Reference** | **Scale - 1** | +============+=======================+===============+ | ``F_D`` | [0, 1] | [0, 1] | +------------+-----------------------+---------------+ References ---------- :cite:`Borer2017a`, :cite:`InternationalTelecommunicationUnion2016a` Examples -------- >>> ootf_BT2100_PQ(0.1) # doctest: +ELLIPSIS 779.9883608... """ E = as_float_array(E) return 100 * eotf_BT1886(oetf_BT709(59.5208 * E))