def setUp(self):
"""
Initialises common tests attributes.
"""
p = np.array([0.73470, 0.26530, 0.00000, 1.00000, 0.00010, -0.07700])
whitepoint = np.array([0.32168, 0.33767])
RGB_to_XYZ_matrix = np.identity(3)
XYZ_to_RGB_matrix = np.identity(3)
self._colourspace = RGB_Colourspace(
'RGB Colourspace', p, whitepoint, 'D60', RGB_to_XYZ_matrix,
XYZ_to_RGB_matrix, lambda x: x, lambda x: x)
def setUp(self):
"""Initialise the common tests attributes."""
p = np.array([0.73470, 0.26530, 0.00000, 1.00000, 0.00010, -0.07700])
whitepoint = np.array([0.32168, 0.33767])
matrix_RGB_to_XYZ = np.identity(3)
matrix_XYZ_to_RGB = np.identity(3)
self._colourspace = RGB_Colourspace(
"RGB Colourspace",
p,
whitepoint,
"ACES",
matrix_RGB_to_XYZ,
matrix_XYZ_to_RGB,
lambda x: x,
lambda x: x,
)
def test_use_derived_transformation_matrices(self):
"""
Tests :func:`colour.models.rgb.rgb_colourspace.RGB_Colourspace.range.\
use_derived_transformation_matrices` method.
"""
p = np.array([0.73470, 0.26530, 0.00000, 1.00000, 0.00010, -0.07700])
whitepoint = np.array([0.32168, 0.33767])
RGB_to_XYZ_matrix = np.identity(3)
XYZ_to_RGB_matrix = np.identity(3)
colourspace = RGB_Colourspace('RGB Colourspace', p, whitepoint, 'D60',
RGB_to_XYZ_matrix, XYZ_to_RGB_matrix)
np.testing.assert_array_equal(colourspace.RGB_to_XYZ_matrix,
np.identity(3))
np.testing.assert_array_equal(colourspace.XYZ_to_RGB_matrix,
np.identity(3))
self.assertTrue(colourspace.use_derived_transformation_matrices())
np.testing.assert_almost_equal(
colourspace.RGB_to_XYZ_matrix,
np.array(
[[0.95255240, 0.00000000, 0.00009368],
[0.34396645, 0.72816610, -0.07213255],
[0.00000000, 0.00000000, 1.00882518]]),
decimal=7) # yapf: disable
np.testing.assert_almost_equal(
colourspace.XYZ_to_RGB_matrix,
np.array(
[[1.04981102, 0.00000000, -0.00009748],
[-0.49590302, 1.37331305, 0.09824004],
[0.00000000, 0.00000000, 0.99125202]]),
decimal=7) # yapf: disable
colourspace.use_derived_RGB_to_XYZ_matrix = False
np.testing.assert_array_equal(colourspace.RGB_to_XYZ_matrix,
np.identity(3))
colourspace.use_derived_XYZ_to_RGB_matrix = False
np.testing.assert_array_equal(colourspace.XYZ_to_RGB_matrix,
np.identity(3))
*CIE XYZ* colourspace to *ProPhoto RGB* colourspace matrix.
XYZ_TO_PROPHOTO_RGB_MATRIX : array_like, (3, 3)
"""
PROPHOTO_RGB_TRANSFER_FUNCTION = lambda x: (x * 16
if x < 0.001953 else x**(1 / 1.8))
"""
Transfer function from linear to *ProPhoto RGB* colourspace.
PROPHOTO_RGB_TRANSFER_FUNCTION : object
"""
PROPHOTO_RGB_INVERSE_TRANSFER_FUNCTION = lambda x: (x / 16 if x < 0.001953 else
x**1.8)
"""
Inverse transfer function from *ProPhoto RGB* colourspace to linear.
PROPHOTO_RGB_INVERSE_TRANSFER_FUNCTION : object
"""
PROPHOTO_RGB_COLOURSPACE = RGB_Colourspace(
'ProPhoto RGB', PROPHOTO_RGB_PRIMARIES, PROPHOTO_RGB_WHITEPOINT,
PROPHOTO_RGB_TO_XYZ_MATRIX, XYZ_TO_PROPHOTO_RGB_MATRIX,
PROPHOTO_RGB_TRANSFER_FUNCTION, PROPHOTO_RGB_INVERSE_TRANSFER_FUNCTION)
"""
*ProPhoto RGB* colourspace.
PROPHOTO_RGB_COLOURSPACE : RGB_Colourspace
"""
XYZ_TO_RUSSELL_RGB_MATRIX = np.linalg.inv(RUSSELL_RGB_TO_XYZ_MATRIX)
"""
*CIE XYZ* colourspace to *Russell RGB* colourspace matrix.
XYZ_TO_RUSSELL_RGB_MATRIX : array_like, (3, 3)
"""
RUSSELL_RGB_TRANSFER_FUNCTION = lambda x: x**(1 / 2.2)
"""
Transfer function from linear to *Russell RGB* colourspace.
RUSSELL_RGB_TRANSFER_FUNCTION : object
"""
RUSSELL_RGB_INVERSE_TRANSFER_FUNCTION = lambda x: x**2.2
"""
Inverse transfer function from *Russell RGB* colourspace to linear.
RUSSELL_RGB_INVERSE_TRANSFER_FUNCTION : object
"""
RUSSELL_RGB_COLOURSPACE = RGB_Colourspace(
'Russell RGB', RUSSELL_RGB_PRIMARIES, RUSSELL_RGB_WHITEPOINT,
RUSSELL_RGB_TO_XYZ_MATRIX, XYZ_TO_RUSSELL_RGB_MATRIX,
RUSSELL_RGB_TRANSFER_FUNCTION, RUSSELL_RGB_INVERSE_TRANSFER_FUNCTION)
"""
*Russell RGB* colourspace.
RUSSELL_RGB_COLOURSPACE : RGB_Colourspace
"""
S_LOG_TRANSFER_FUNCTION = lambda x: (
(0.432699 * math.log10(x + 0.037584) + 0.616596) + 0.03)
"""
Transfer function from linear to *S-Log* colourspace.
S_LOG_TRANSFER_FUNCTION : object
"""
S_LOG_INVERSE_TRANSFER_FUNCTION = lambda x: (
(math.pow(10, ((x - 0.616596 - 0.03) / 0.432699)) - 0.037584))
"""
Inverse transfer function from *S-Log* colourspace to linear.
S_LOG_INVERSE_TRANSFER_FUNCTION : object
"""
S_LOG_COLOURSPACE = RGB_Colourspace(
'S-Log',
S_LOG_PRIMARIES,
S_LOG_WHITEPOINT,
S_LOG_TO_XYZ_MATRIX,
XYZ_TO_S_LOG_MATRIX,
S_LOG_TRANSFER_FUNCTION,
S_LOG_INVERSE_TRANSFER_FUNCTION)
"""
*S-Log* colourspace.
S_LOG_COLOURSPACE : RGB_Colourspace
"""
"""
Opto-electronic conversion function of *Ekta Space PS 5*
colourspace.
EKTA_SPACE_PS_5_OECF : object
"""
EKTA_SPACE_PS_5_EOCF = (
_ekta_space_ps_5_EOCF)
"""
Electro-optical conversion function of *Ekta Space PS 5* colourspace to
linear.
EKTA_SPACE_PS_5_EOCF : object
"""
EKTA_SPACE_PS_5_COLOURSPACE = RGB_Colourspace(
'Ekta Space PS 5',
EKTA_SPACE_PS_5_PRIMARIES,
EKTA_SPACE_PS_5_WHITEPOINT,
EKTA_SPACE_PS_5_V_ILLUMINANT,
EKTA_SPACE_PS_5_TO_XYZ_MATRIX,
XYZ_TO_EKTA_SPACE_PS_5_MATRIX,
EKTA_SPACE_PS_5_OECF,
EKTA_SPACE_PS_5_EOCF)
"""
*Ekta Space PS 5* colourspace.
EKTA_SPACE_PS_5_COLOURSPACE : RGB_Colourspace
"""
"""
*CIE XYZ* colourspace to *Ekta Space PS 5* colourspace matrix.
XYZ_TO_EKTA_SPACE_PS_5_MATRIX : array_like, (3, 3)
"""
EKTA_SPACE_PS_5_TRANSFER_FUNCTION = lambda x: x**(1 / 2.2)
"""
Transfer function from linear to *Ekta Space PS 5* colourspace.
EKTA_SPACE_PS_5_TRANSFER_FUNCTION : object
"""
EKTA_SPACE_PS_5_INVERSE_TRANSFER_FUNCTION = lambda x: x**2.2
"""
Inverse transfer function from *Ekta Space PS 5* colourspace to linear.
EKTA_SPACE_PS_5_INVERSE_TRANSFER_FUNCTION : object
"""
EKTA_SPACE_PS_5_COLOURSPACE = RGB_Colourspace(
'Ekta Space PS 5', EKTA_SPACE_PS_5_PRIMARIES, EKTA_SPACE_PS_5_WHITEPOINT,
EKTA_SPACE_PS_5_TO_XYZ_MATRIX, XYZ_TO_EKTA_SPACE_PS_5_MATRIX,
EKTA_SPACE_PS_5_TRANSFER_FUNCTION,
EKTA_SPACE_PS_5_INVERSE_TRANSFER_FUNCTION)
"""
*Ekta Space PS 5* colourspace.
EKTA_SPACE_PS_5_COLOURSPACE : RGB_Colourspace
"""
XYZ_TO_PAL_SECAM_RGB_MATRIX = np.linalg.inv(PAL_SECAM_RGB_TO_XYZ_MATRIX)
"""
*CIE XYZ* colourspace to *Pal/Secam RGB* colourspace matrix.
XYZ_TO_PAL_SECAM_RGB_MATRIX : array_like, (3, 3)
"""
PAL_SECAM_RGB_TRANSFER_FUNCTION = lambda x: x**(1 / 2.8)
"""
Transfer function from linear to *Pal/Secam RGB* colourspace.
PAL_SECAM_RGB_TRANSFER_FUNCTION : object
"""
PAL_SECAM_RGB_INVERSE_TRANSFER_FUNCTION = lambda x: x**2.8
"""
Inverse transfer function from *Pal/Secam RGB* colourspace to linear.
PAL_SECAM_RGB_INVERSE_TRANSFER_FUNCTION : object
"""
PAL_SECAM_RGB_COLOURSPACE = RGB_Colourspace(
'Pal/Secam RGB', PAL_SECAM_RGB_PRIMARIES, PAL_SECAM_RGB_WHITEPOINT,
PAL_SECAM_RGB_TO_XYZ_MATRIX, XYZ_TO_PAL_SECAM_RGB_MATRIX,
PAL_SECAM_RGB_TRANSFER_FUNCTION, PAL_SECAM_RGB_INVERSE_TRANSFER_FUNCTION)
"""
*Pal/Secam RGB* colourspace.
PAL_SECAM_RGB_COLOURSPACE : RGB_Colourspace
"""
b = REC_2020_CONSTANTS.beta(is_10_bits_system)
return np.where(value < _rec_2020_OECF(b), value / 4.5,
((value + (a - 1)) / a)**(1 / 0.45))
REC_2020_OECF = _rec_2020_OECF
"""
Opto-electronic conversion function of *Rec. 2020* colourspace.
REC_2020_OECF : object
"""
REC_2020_EOCF = _rec_2020_EOCF
"""
Electro-optical conversion function of *Rec. 2020* colourspace.
REC_2020_EOCF : object
"""
REC_2020_COLOURSPACE = RGB_Colourspace('Rec. 2020', REC_2020_PRIMARIES,
REC_2020_WHITEPOINT,
REC_2020_ILLUMINANT,
REC_2020_TO_XYZ_MATRIX,
XYZ_TO_REC_2020_MATRIX, REC_2020_OECF,
REC_2020_EOCF)
"""
*Rec. 2020* colourspace.
REC_2020_COLOURSPACE : RGB_Colourspace
"""
value = np.asarray(value)
return value**2.2
MAX_RGB_OECF = _max_rgb_OECF
"""
Opto-electronic conversion function of *Max RGB* colourspace.
MAX_RGB_OECF : object
"""
MAX_RGB_EOCF = _max_rgb_EOCF
"""
Electro-optical conversion function of *Max RGB* colourspace.
MAX_RGB_EOCF : object
"""
MAX_RGB_COLOURSPACE = RGB_Colourspace('Max RGB', MAX_RGB_PRIMARIES,
MAX_RGB_WHITEPOINT, MAX_RGB_ILLUMINANT,
MAX_RGB_TO_XYZ_MATRIX,
XYZ_TO_MAX_RGB_MATRIX, MAX_RGB_OECF,
MAX_RGB_EOCF)
"""
*Max RGB* colourspace.
MAX_RGB_COLOURSPACE : RGB_Colourspace
"""
CINEMA_GAMUT_OECF = _cinema_gamut_OECF
"""
Opto-electronic conversion function of *Cinema Gamut* colourspace.
CINEMA_GAMUT_OECF : object
"""
CINEMA_GAMUT_EOCF = (
_cinema_gamut_EOCF)
"""
Electro-optical conversion function of *Cinema Gamut* colourspace.
CINEMA_GAMUT_EOCF : object
"""
CINEMA_GAMUT_COLOURSPACE = RGB_Colourspace(
'Cinema Gamut',
CINEMA_GAMUT_PRIMARIES,
CINEMA_GAMUT_WHITEPOINT,
CINEMA_GAMUT_ILLUMINANT,
CINEMA_GAMUT_TO_XYZ_MATRIX,
XYZ_TO_CINEMA_GAMUT_MATRIX,
CINEMA_GAMUT_OECF,
CINEMA_GAMUT_EOCF)
"""
*Cinema Gamut* colourspace.
CINEMA_GAMUT_COLOURSPACE : RGB_Colourspace
"""
RED_LOG_FILM_OECF : object
"""
RED_LOG_FILM_EOCF = _red_log_film_to_linear
"""
Electro-optical conversion function of *REDLogFilm* to linear.
RED_LOG_FILM_EOCF : object
"""
RED_COLOR_COLOURSPACE = RGB_Colourspace(
'REDcolor',
RED_COLOR_PRIMARIES,
RED_COLOR_WHITEPOINT,
RED_COLOR_ILLUMINANT,
RED_COLOR_TO_XYZ_MATRIX,
XYZ_TO_RED_COLOR_MATRIX,
RED_LOG_FILM_OECF,
RED_LOG_FILM_EOCF)
"""
*REDcolor* colourspace.
RED_COLOR_COLOURSPACE : RGB_Colourspace
"""
RED_COLOR_2_PRIMARIES = np.array(
[[0.8786825104761286, 0.3249640074099105],
[0.3008887143674324, 0.6790547557905675],
[0.0953986946056151, -0.0293793268343266]])
"""
"""
return luminance_1976(value * 100) / 100
ECI_RGB_V2_OECF = _eci_rgb_v2_OECF
"""
Opto-electronic conversion function of *ECI RGB v2* colourspace.
ECI_RGB_V2_OECF : object
"""
ECI_RGB_V2_EOCF = _eci_rgb_v2_EOCF
"""
Electro-optical conversion function of *ECI RGB v2* colourspace.
ECI_RGB_V2_EOCF : object
"""
ECI_RGB_V2_COLOURSPACE = RGB_Colourspace('ECI RGB v2', ECI_RGB_V2_PRIMARIES,
ECI_RGB_V2_WHITEPOINT,
ECI_RGB_V_ILLUMINANT,
ECI_RGB_V2_TO_XYZ_MATRIX,
XYZ_TO_ECI_RGB_V2_MATRIX,
ECI_RGB_V2_OECF, ECI_RGB_V2_EOCF)
"""
*ECI RGB v2* colourspace.
ECI_RGB_V2_COLOURSPACE : RGB_Colourspace
"""
XYZ_TO_MAX_RGB_MATRIX : array_like, (3, 3)
"""
MAX_RGB_TRANSFER_FUNCTION = lambda x: x ** (1 / 2.2)
"""
Transfer function from linear to *Max RGB* colourspace.
MAX_RGB_TRANSFER_FUNCTION : object
"""
MAX_RGB_INVERSE_TRANSFER_FUNCTION = lambda x: x ** 2.2
"""
Inverse transfer function from *Max RGB* colourspace to linear.
MAX_RGB_INVERSE_TRANSFER_FUNCTION : object
"""
MAX_RGB_COLOURSPACE = RGB_Colourspace(
'Max RGB',
MAX_RGB_PRIMARIES,
MAX_RGB_WHITEPOINT,
MAX_RGB_TO_XYZ_MATRIX,
XYZ_TO_MAX_RGB_MATRIX,
MAX_RGB_TRANSFER_FUNCTION,
MAX_RGB_INVERSE_TRANSFER_FUNCTION)
"""
*Max RGB* colourspace.
MAX_RGB_COLOURSPACE : RGB_Colourspace
"""
"""
Opto-electronic conversion function of *Adobe Wide Gamut RGB*
colourspace.
ADOBE_WIDE_GAMUT_RGB_OECF : object
"""
ADOBE_WIDE_GAMUT_RGB_EOCF = (
_adobe_wide_gamut_rgb_EOCF)
"""
Electro-optical conversion function of *Adobe Wide Gamut RGB* colourspace to
linear.
ADOBE_WIDE_GAMUT_RGB_EOCF : object
"""
ADOBE_WIDE_GAMUT_RGB_COLOURSPACE = RGB_Colourspace(
'Adobe Wide Gamut RGB',
ADOBE_WIDE_GAMUT_RGB_PRIMARIES,
ADOBE_WIDE_GAMUT_RGB_WHITEPOINT,
ADOBE_WIDE_GAMUT_RGB_ILLUMINANT,
ADOBE_WIDE_GAMUT_RGB_TO_XYZ_MATRIX,
XYZ_TO_ADOBE_WIDE_GAMUT_RGB_MATRIX,
ADOBE_WIDE_GAMUT_RGB_OECF,
ADOBE_WIDE_GAMUT_RGB_EOCF)
"""
*Adobe Wide Gamut RGB* colourspace.
ADOBE_WIDE_GAMUT_RGB_COLOURSPACE : RGB_Colourspace
"""
*CIE XYZ* colourspace to *sRGB* colourspace matrix.
XYZ_TO_sRGB_MATRIX : array_like, (3, 3)
"""
sRGB_TRANSFER_FUNCTION = lambda x: (x * 12.92 if x <= 0.0031308 else 1.055 *
(x**(1 / 2.4)) - 0.055)
"""
Transfer function from linear to *sRGB* colourspace.
sRGB_TRANSFER_FUNCTION : object
"""
sRGB_INVERSE_TRANSFER_FUNCTION = lambda x: (x / 12.92 if x <= 0.0031308 else
((x + 0.055) / 1.055)**2.4)
"""
Inverse transfer function from *sRGB* colourspace to linear.
sRGB_INVERSE_TRANSFER_FUNCTION : object
"""
sRGB_COLOURSPACE = RGB_Colourspace('sRGB', sRGB_PRIMARIES, sRGB_WHITEPOINT,
sRGB_TO_XYZ_MATRIX, XYZ_TO_sRGB_MATRIX,
sRGB_TRANSFER_FUNCTION,
sRGB_INVERSE_TRANSFER_FUNCTION)
"""
*sRGB* colourspace.
sRGB_COLOURSPACE : RGB_Colourspace
"""
*CIE XYZ* colourspace to *NTSC RGB* colourspace matrix.
XYZ_TO_NTSC_RGB_MATRIX : array_like, (3, 3)
"""
NTSC_RGB_TRANSFER_FUNCTION = lambda x: x**(1 / 2.2)
"""
Transfer function from linear to *NTSC RGB* colourspace.
NTSC_RGB_TRANSFER_FUNCTION : object
"""
NTSC_RGB_INVERSE_TRANSFER_FUNCTION = lambda x: x**2.2
"""
Inverse transfer function from *NTSC RGB* colourspace to linear.
NTSC_RGB_INVERSE_TRANSFER_FUNCTION : object
"""
NTSC_RGB_COLOURSPACE = RGB_Colourspace('NTSC RGB', NTSC_RGB_PRIMARIES,
NTSC_RGB_WHITEPOINT,
NTSC_RGB_TO_XYZ_MATRIX,
XYZ_TO_NTSC_RGB_MATRIX,
NTSC_RGB_TRANSFER_FUNCTION,
NTSC_RGB_INVERSE_TRANSFER_FUNCTION)
"""
*NTSC RGB* colourspace.
NTSC_RGB_COLOURSPACE : RGB_Colourspace
"""
XTREME_RGB_OECF = _xtreme_rgb_OECF
"""
Opto-electronic conversion function of *Xtreme RGB* colourspace.
XTREME_RGB_OECF : object
"""
XTREME_RGB_EOCF = _xtreme_rgb_EOCF
"""
Electro-optical conversion function of *Xtreme RGB* colourspace.
XTREME_RGB_EOCF : object
"""
XTREME_RGB_COLOURSPACE = RGB_Colourspace(
'Xtreme RGB',
XTREME_RGB_PRIMARIES,
XTREME_RGB_WHITEPOINT,
XTREME_RGB_ILLUMINANT,
XTREME_RGB_TO_XYZ_MATRIX,
XYZ_TO_XTREME_RGB_MATRIX,
XTREME_RGB_OECF,
XTREME_RGB_EOCF)
"""
*Xtreme RGB* colourspace.
XTREME_RGB_COLOURSPACE : RGB_Colourspace
"""
value = np.asarray(value)
return value**2.2
BEST_RGB_OECF = _best_rgb_OECF
"""
Opto-electronic conversion function of *Best RGB* colourspace.
BEST_RGB_OECF : object
"""
BEST_RGB_EOCF = _best_rgb_EOCF
"""
Electro-optical conversion function of *Best RGB* colourspace.
BEST_RGB_EOCF : object
"""
BEST_RGB_COLOURSPACE = RGB_Colourspace('Best RGB', BEST_RGB_PRIMARIES,
BEST_RGB_WHITEPOINT,
BEST_RGB_ILLUMINANT,
BEST_RGB_TO_XYZ_MATRIX,
XYZ_TO_BEST_RGB_MATRIX, BEST_RGB_OECF,
BEST_RGB_EOCF)
"""
*Best RGB* colourspace.
BEST_RGB_COLOURSPACE : RGB_Colourspace
"""
REC_709_OECF = _rec_709_OECF
"""
Opto-electronic conversion function of *Rec. 709* colourspace.
REC_709_OECF : object
"""
REC_709_EOCF = _rec_709_EOCF
"""
Electro-optical conversion function of *Rec. 709* colourspace.
REC_709_EOCF : object
Warning
-------
*Recommendation ITU-R BT.709-5* doesn't specify an electro-optical conversion
function. This definition is used for symmetry in unit tests and other
computations but should not be used as an *EOCF* for *Rec. 709* colourspace!
"""
REC_709_COLOURSPACE = RGB_Colourspace('Rec. 709', REC_709_PRIMARIES,
REC_709_WHITEPOINT, REC_709_ILLUMINANT,
REC_709_TO_XYZ_MATRIX,
XYZ_TO_REC_709_MATRIX, REC_709_OECF,
REC_709_EOCF)
"""
*Rec. 709* colourspace.
REC_709_COLOURSPACE : RGB_Colourspace
"""
value = np.asarray(value)
return value**2.2
NTSC_RGB_OECF = _ntsc_rgb_OECF
"""
Opto-electronic conversion function of *NTSC RGB* colourspace.
NTSC_RGB_OECF : object
"""
NTSC_RGB_EOCF = _ntsc_rgb_EOCF
"""
Electro-optical conversion function of *NTSC RGB* colourspace.
NTSC_RGB_EOCF : object
"""
NTSC_RGB_COLOURSPACE = RGB_Colourspace('NTSC RGB', NTSC_RGB_PRIMARIES,
NTSC_RGB_WHITEPOINT,
NTSC_RGB_ILLUMINANT,
NTSC_RGB_TO_XYZ_MATRIX,
XYZ_TO_NTSC_RGB_MATRIX, NTSC_RGB_OECF,
NTSC_RGB_EOCF)
"""
*NTSC RGB* colourspace.
NTSC_RGB_COLOURSPACE : RGB_Colourspace
"""
ALEXA_WIDE_GAMUT_RGB_TRANSFER_FUNCTION = (
_alexa_wide_gamut_rgb_transfer_function)
"""
Transfer function from linear to *ALEXA Wide Gamut RGB* colourspace.
ALEXA_WIDE_GAMUT_RGB_TRANSFER_FUNCTION : object
"""
ALEXA_WIDE_GAMUT_RGB_INVERSE_TRANSFER_FUNCTION = (
_alexa_wide_gamut_rgb_inverse_transfer_function)
"""
Inverse transfer function from *ALEXA Wide Gamut RGB* colourspace to linear.
ALEXA_WIDE_GAMUT_RGB_INVERSE_TRANSFER_FUNCTION : object
"""
ALEXA_WIDE_GAMUT_RGB_COLOURSPACE = RGB_Colourspace(
'ALEXA Wide Gamut RGB',
ALEXA_WIDE_GAMUT_RGB_PRIMARIES,
ALEXA_WIDE_GAMUT_RGB_WHITEPOINT,
ALEXA_WIDE_GAMUT_RGB_TO_XYZ_MATRIX,
XYZ_TO_ALEXA_WIDE_GAMUT_RGB_MATRIX,
ALEXA_WIDE_GAMUT_RGB_TRANSFER_FUNCTION,
ALEXA_WIDE_GAMUT_RGB_INVERSE_TRANSFER_FUNCTION)
"""
*ALEXA Wide Gamut RGB* colourspace.
ALEXA_WIDE_GAMUT_RGB_COLOURSPACE : RGB_Colourspace
"""
value = np.where(value < cut2, (value - 0.125) / 5.6,
np.power(10, ((value - d) / c)) - b)
return value
V_LOG_OECF = _linear_to_v_log
"""
Opto-electronic conversion function of *V-Log*.
V_LOG_OECF : object
"""
V_LOG_EOCF = _v_log_to_linear
"""
Electro-optical conversion function of *V-Log* to linear.
V_LOG_EOCF : object
"""
V_GAMUT_COLOURSPACE = RGB_Colourspace('V-Gamut', V_GAMUT_PRIMARIES,
V_GAMUT_WHITEPOINT, V_GAMUT_ILLUMINANT,
V_GAMUT_TO_XYZ_MATRIX,
XYZ_TO_V_GAMUT_MATRIX, V_LOG_OECF,
V_LOG_EOCF)
"""
*V-Gamut* colourspace.
V_GAMUT_COLOURSPACE : RGB_Colourspace
"""
XYZ_TO_ADOBE_RGB_1998_MATRIX = np.linalg.inv(ADOBE_RGB_1998_TO_XYZ_MATRIX)
"""
*CIE XYZ* colourspace to *Adobe RGB 1998* colourspace matrix.
XYZ_TO_ADOBE_RGB_1998_MATRIX : array_like, (3, 3)
"""
ADOBE_RGB_1998_TRANSFER_FUNCTION = lambda x: x**(1 / (563 / 256))
"""
Transfer function from linear to *Adobe RGB 1998* colourspace.
ADOBE_RGB_1998_TRANSFER_FUNCTION : object
"""
ADOBE_RGB_1998_INVERSE_TRANSFER_FUNCTION = lambda x: x**(563 / 256)
"""
Inverse transfer function from *Adobe RGB 1998* colourspace to linear.
ADOBE_RGB_1998_INVERSE_TRANSFER_FUNCTION : object
"""
ADOBE_RGB_1998_COLOURSPACE = RGB_Colourspace(
'Adobe RGB 1998', ADOBE_RGB_1998_PRIMARIES, ADOBE_RGB_1998_WHITEPOINT,
ADOBE_RGB_1998_TO_XYZ_MATRIX, XYZ_TO_ADOBE_RGB_1998_MATRIX,
ADOBE_RGB_1998_TRANSFER_FUNCTION, ADOBE_RGB_1998_INVERSE_TRANSFER_FUNCTION)
"""
*Adobe RGB 1998* colourspace.
ADOBE_RGB_1998_COLOURSPACE : RGB_Colourspace
"""
*CIE XYZ* colourspace to *Best RGB* colourspace matrix.
XYZ_TO_BEST_RGB_MATRIX : array_like, (3, 3)
"""
BEST_RGB_TRANSFER_FUNCTION = lambda x: x**(1 / 2.2)
"""
Transfer function from linear to *Best RGB* colourspace.
BEST_RGB_TRANSFER_FUNCTION : object
"""
BEST_RGB_INVERSE_TRANSFER_FUNCTION = lambda x: x**2.2
"""
Inverse transfer function from *Best RGB* colourspace to linear.
BEST_RGB_INVERSE_TRANSFER_FUNCTION : object
"""
BEST_RGB_COLOURSPACE = RGB_Colourspace('Best RGB', BEST_RGB_PRIMARIES,
BEST_RGB_WHITEPOINT,
BEST_RGB_TO_XYZ_MATRIX,
XYZ_TO_BEST_RGB_MATRIX,
BEST_RGB_TRANSFER_FUNCTION,
BEST_RGB_INVERSE_TRANSFER_FUNCTION)
"""
*Best RGB* colourspace.
BEST_RGB_COLOURSPACE : RGB_Colourspace
"""
XYZ_TO_SMPTE_C_RGB_MATRIX = np.linalg.inv(SMPTE_C_RGB_TO_XYZ_MATRIX)
"""
*CIE XYZ* colourspace to *SMPTE-C RGB* colourspace matrix.
XYZ_TO_SMPTE_C_RGB_MATRIX : array_like, (3, 3)
"""
SMPTE_C_RGB_TRANSFER_FUNCTION = lambda x: x**(1 / 2.2)
"""
Transfer function from linear to *SMPTE-C RGB* colourspace.
SMPTE_C_RGB_TRANSFER_FUNCTION : object
"""
SMPTE_C_RGB_INVERSE_TRANSFER_FUNCTION = lambda x: x**2.2
"""
Inverse transfer function from *SMPTE-C RGB* colourspace to linear.
SMPTE_C_RGB_INVERSE_TRANSFER_FUNCTION : object
"""
SMPTE_C_RGB_COLOURSPACE = RGB_Colourspace(
'SMPTE-C RGB', SMPTE_C_RGB_PRIMARIES, SMPTE_C_RGB_WHITEPOINT,
SMPTE_C_RGB_TO_XYZ_MATRIX, XYZ_TO_SMPTE_C_RGB_MATRIX,
SMPTE_C_RGB_TRANSFER_FUNCTION, SMPTE_C_RGB_INVERSE_TRANSFER_FUNCTION)
"""
*SMPTE-C RGB* colourspace.
SMPTE_C_RGB_COLOURSPACE : RGB_Colourspace
"""
"""
value = np.asarray(value)
return value**2.8
PAL_SECAM_RGB_OECF = _pal_secam_rgb_OECF
"""
Opto-electronic conversion function of *Pal/Secam RGB* colourspace.
PAL_SECAM_RGB_OECF : object
"""
PAL_SECAM_RGB_EOCF = (_pal_secam_rgb_EOCF)
"""
Electro-optical conversion function of *Pal/Secam RGB* colourspace.
PAL_SECAM_RGB_EOCF : object
"""
PAL_SECAM_RGB_COLOURSPACE = RGB_Colourspace(
'Pal/Secam RGB', PAL_SECAM_RGB_PRIMARIES, PAL_SECAM_RGB_WHITEPOINT,
PAL_SECAM_RGB_ILLUMINANT, PAL_SECAM_RGB_TO_XYZ_MATRIX,
XYZ_TO_PAL_SECAM_RGB_MATRIX, PAL_SECAM_RGB_OECF, PAL_SECAM_RGB_EOCF)
"""
*Pal/Secam RGB* colourspace.
PAL_SECAM_RGB_COLOURSPACE : RGB_Colourspace
"""
ALEXA_LOG_C_OECF = _linear_to_alexa_log_c
"""
Opto-electronic conversion function of *ALEXA Log C*.
ALEXA_LOG_C_OECF : object
"""
ALEXA_LOG_C_EOCF = _alexa_log_c_to_linear
"""
Electro-optical conversion function of *ALEXA Log C* to linear.
ALEXA_LOG_C_EOCF : object
"""
ALEXA_WIDE_GAMUT_RGB_COLOURSPACE = RGB_Colourspace(
'ALEXA Wide Gamut RGB',
ALEXA_WIDE_GAMUT_RGB_PRIMARIES,
ALEXA_WIDE_GAMUT_RGB_WHITEPOINT,
ALEXA_WIDE_GAMUT_RGB_ILLUMINANT,
ALEXA_WIDE_GAMUT_RGB_TO_XYZ_MATRIX,
XYZ_TO_ALEXA_WIDE_GAMUT_RGB_MATRIX,
ALEXA_LOG_C_OECF,
ALEXA_LOG_C_EOCF)
"""
*ALEXA Wide Gamut RGB* colourspace.
ALEXA_WIDE_GAMUT_RGB_COLOURSPACE : RGB_Colourspace
"""
"""
*CIE XYZ* colourspace to *ColorMatch RGB* colourspace matrix.
XYZ_TO_COLOR_MATCH_RGB_MATRIX : array_like, (3, 3)
"""
COLOR_MATCH_RGB_TRANSFER_FUNCTION = lambda x: x**(1 / 1.8)
"""
Transfer function from linear to *ColorMatch RGB* colourspace.
COLOR_MATCH_RGB_TRANSFER_FUNCTION : object
"""
COLOR_MATCH_RGB_INVERSE_TRANSFER_FUNCTION = lambda x: x**1.8
"""
Inverse transfer function from *ColorMatch RGB* colourspace to linear.
COLOR_MATCH_RGB_INVERSE_TRANSFER_FUNCTION : object
"""
COLOR_MATCH_RGB_COLOURSPACE = RGB_Colourspace(
'ColorMatch RGB', COLOR_MATCH_RGB_PRIMARIES, COLOR_MATCH_RGB_WHITEPOINT,
COLOR_MATCH_RGB_TO_XYZ_MATRIX, XYZ_TO_COLOR_MATCH_RGB_MATRIX,
COLOR_MATCH_RGB_TRANSFER_FUNCTION,
COLOR_MATCH_RGB_INVERSE_TRANSFER_FUNCTION)
"""
*ColorMatch RGB* colourspace.
COLOR_MATCH_RGB_COLOURSPACE : RGB_Colourspace
"""