__status__ = 'Production'
__all__ = ['create_matrix_colorspace',
- 'create_colorspaces']
+ 'create_transfer_colorspace',
+ 'create_matrix_plus_transfer_colorspace',
+ 'transfer_function_sRGB_to_linear',
+ 'transfer_function_Rec709_to_linear',
+ 'transfer_function_Rec2020_10bit_to_linear',
+ 'transfer_function_Rec2020_12bit_to_linear',
+ 'transfer_function_Rec1886_to_linear',
+ 'create_colorspaces',
+ 'create_raw']
# -------------------------------------------------------------------------
def create_matrix_colorspace(name='matrix',
from_reference_values=None,
to_reference_values=None,
- aliases=[]):
+ aliases=None):
"""
- Object description.
+ Creates a ColorSpace that only uses *Matrix Transforms*
Parameters
----------
- parameter : type
- Parameter description.
+ name : str, optional
+ Aliases for this colorspace
+ from_reference_values : list of matrices
+ List of matrices to convert from the reference colorspace to this space
+ to_reference_values : list of matrices
+ List of matrices to convert to the reference colorspace from this space
+ aliases : list of str, optional
+ Aliases for this colorspace
Returns
-------
- type
- Return value description.
+ ColorSpace
+ A *Matrix Transform*-based ColorSpace
"""
if from_reference_values is None:
if to_reference_values is None:
to_reference_values = []
+ if aliases is None:
+ aliases = []
+
cs = ColorSpace(name)
cs.description = 'The %s color space' % name
cs.aliases = aliases
cs.family = 'Utility'
cs.is_data = False
- # A linear space needs allocation variables
+ # A linear space needs allocation variables.
cs.allocation_type = ocio.Constants.ALLOCATION_UNIFORM
cs.allocation_vars = [0, 1]
transfer_function=lambda x: x,
lut_directory='/tmp',
lut_resolution_1d=1024,
- aliases=[]):
+ aliases=None):
"""
- Object description.
+ Creates a ColorSpace that only uses transfer functions encoded as 1D LUTs
Parameters
----------
- parameter : type
- Parameter description.
+ name : str, optional
+ Aliases for this colorspace
+ transfer_function_name : str, optional
+ The name of the transfer function
+ transfer_function : function, optional
+ The transfer function to be evaluated
+ lut_directory : str or unicode
+ The directory to use when generating LUTs
+ lut_resolution_1d : int
+ The resolution of generated 1D LUTs
+ aliases : list of str
+ Aliases for this colorspace
Returns
-------
- type
- Return value description.
+ ColorSpace
+ A *LUT1D Transform*-based ColorSpace representing a transfer function
"""
+ if aliases is None:
+ aliases = []
+
cs = ColorSpace(name)
cs.description = 'The %s color space' % name
cs.aliases = aliases
cs.family = 'Utility'
cs.is_data = False
- # A linear space needs allocation variables
+ # A linear space needs allocation variables.
cs.allocation_type = ocio.Constants.ALLOCATION_UNIFORM
cs.allocation_vars = [0, 1]
- # Sample the transfer function
+ # Sampling the transfer function.
data = array.array('f', '\0' * lut_resolution_1d * 4)
for c in range(lut_resolution_1d):
data[c] = transfer_function(c / (lut_resolution_1d - 1))
- # Write the sampled data to a LUT
+ # Writing the sampled data to a *LUT*.
lut = '%s_to_linear.spi1d' % transfer_function_name
genlut.write_SPI_1d(
os.path.join(lut_directory, lut),
lut_resolution_1d,
1)
- # Create the 'to_reference' transforms
+ # Creating the *to_reference* transforms.
cs.to_reference_transforms = []
cs.to_reference_transforms.append({
'type': 'lutFile',
'interpolation': 'linear',
'direction': 'forward'})
- # Create the 'from_reference' transforms
+ # Creating the *from_reference* transforms.
cs.from_reference_transforms = []
return cs
-# create_transfer_colorspace
-
# -------------------------------------------------------------------------
# *Transfer Function + Matrix Transform*
# -------------------------------------------------------------------------
-def create_matrix_plus_transfer_colorspace(name='matrix_plus_transfer',
- transfer_function_name='transfer_function',
- transfer_function=lambda x: x,
- lut_directory='/tmp',
- lut_resolution_1d=1024,
- from_reference_values=None,
- to_reference_values=None,
- aliases=[]):
+def create_matrix_plus_transfer_colorspace(
+ name='matrix_plus_transfer',
+ transfer_function_name='transfer_function',
+ transfer_function=lambda x: x,
+ lut_directory='/tmp',
+ lut_resolution_1d=1024,
+ from_reference_values=None,
+ to_reference_values=None,
+ aliases=None):
"""
- Object description.
+ Creates a ColorSpace that uses transfer functions encoded as 1D LUTs and
+ matrice
Parameters
----------
- parameter : type
- Parameter description.
+ name : str, optional
+ Aliases for this colorspace
+ transfer_function_name : str, optional
+ The name of the transfer function
+ transfer_function : function, optional
+ The transfer function to be evaluated
+ lut_directory : str or unicode
+ The directory to use when generating LUTs
+ lut_resolution_1d : int
+ The resolution of generated 1D LUTs
+ from_reference_values : list of matrices
+ List of matrices to convert from the reference colorspace to this space
+ to_reference_values : list of matrices
+ List of matrices to convert to the reference colorspace from this space
+ aliases : list of str
+ Aliases for this colorspace
Returns
-------
- type
- Return value description.
+ ColorSpace
+ A *Matrx and LUT1D Transform*-based ColorSpace representing a transfer
+ function and matrix
"""
if from_reference_values is None:
if to_reference_values is None:
to_reference_values = []
+ if aliases is None:
+ aliases = []
+
cs = ColorSpace(name)
cs.description = 'The %s color space' % name
cs.aliases = aliases
cs.family = 'Utility'
cs.is_data = False
- # A linear space needs allocation variables
+ # A linear space needs allocation variables.
cs.allocation_type = ocio.Constants.ALLOCATION_UNIFORM
cs.allocation_vars = [0, 1]
- # Sample the transfer function
+ # Sampling the transfer function.
data = array.array('f', '\0' * lut_resolution_1d * 4)
for c in range(lut_resolution_1d):
data[c] = transfer_function(c / (lut_resolution_1d - 1))
- # Write the sampled data to a LUT
+ # Writing the sampled data to a *LUT*.
lut = '%s_to_linear.spi1d' % transfer_function_name
genlut.write_SPI_1d(
os.path.join(lut_directory, lut),
lut_resolution_1d,
1)
- # Create the 'to_reference' transforms
+ # Creating the *to_reference* transforms.
cs.to_reference_transforms = []
if to_reference_values:
cs.to_reference_transforms.append({
'matrix': mat44_from_mat33(matrix),
'direction': 'forward'})
- # Create the 'from_reference' transforms
+ # Creating the *from_reference* transforms.
cs.from_reference_transforms = []
if from_reference_values:
for matrix in from_reference_values:
return cs
-# create_matrix_plus_transfer_colorspace
-
-# Transfer functions for standard color spaces
+# Transfer functions for standard colorspaces.
def transfer_function_sRGB_to_linear(v):
+ """
+ The sRGB (IEC 61966-2-1) transfer function
+
+ Parameters
+ ----------
+ v : float
+ The normalized value to pass through the function
+
+ Returns
+ -------
+ float
+ A converted value
+ """
a = 1.055
b = 0.04045
d = 12.92
def transfer_function_Rec709_to_linear(v):
+ """
+ The Rec.709 transfer function
+
+ Parameters
+ ----------
+ v : float
+ The normalized value to pass through the function
+
+ Returns
+ -------
+ float
+ A converted value
+ """
a = 1.099
b = 0.018
d = 4.5
def transfer_function_Rec2020_10bit_to_linear(v):
+ """
+ The Rec.2020 10-bit transfer function
+
+ Parameters
+ ----------
+ v : float
+ The normalized value to pass through the function
+
+ Returns
+ -------
+ float
+ A converted value
+ """
a = 1.099
b = 0.018
d = 4.5
def transfer_function_Rec2020_12bit_to_linear(v):
+ """
+ The Rec.2020 12-bit transfer function
+
+ Parameters
+ ----------
+ v : float
+ The normalized value to pass through the function
+
+ Returns
+ -------
+ float
+ A converted value
+ """
a = 1.0993
b = 0.0181
d = 4.5
def transfer_function_Rec1886_to_linear(v):
+ """
+ The Rec.1886 transfer function
+
+ Parameters
+ ----------
+ v : float
+ The normalized value to pass through the function
+
+ Returns
+ -------
+ float
+ A converted value
+ """
g = 2.4
Lw = 1
Lb = 0
- # Ignoring legal to full scaling for now
+ # Ignoring legal to full scaling for now.
# v = (1023.0*v - 64.0)/876.0
t = pow(Lw, 1.0 / g) - pow(Lb, 1.0 / g)
def create_colorspaces(lut_directory,
- lut_resolution_1d,
- lut_resolution_3d):
+ lut_resolution_1d):
"""
Generates the colorspace conversions.
Parameters
----------
- parameter : type
- Parameter description.
+ lut_directory : str or unicode
+ The directory to use when generating LUTs
+ lut_resolution_1d : int
+ The resolution of generated 1D LUTs
Returns
-------
- type
- Return value description.
+ list
+ A list of colorspaces for general colorspaces and encodings
"""
colorspaces = []
- #
+ # -------------------------------------------------------------------------
# XYZ
- #
- cs = create_matrix_colorspace('XYZ-D60',
+ # -------------------------------------------------------------------------
+ cs = create_matrix_colorspace('XYZ - D60',
to_reference_values=[aces.ACES_XYZ_TO_AP0],
from_reference_values=[aces.ACES_AP0_TO_XYZ],
- aliases=["lin_xyz_d60"])
+ aliases=['lin_xyz_d60'])
colorspaces.append(cs)
- #
+ # -------------------------------------------------------------------------
# P3-D60
- #
- # *ACES* to *Linear*, *P3D60* primaries.
+ # -------------------------------------------------------------------------
+ # *ACES* to *Linear*, *P3D60* primaries
XYZ_to_P3D60 = [2.4027414142, -0.8974841639, -0.3880533700,
-0.8325796487, 1.7692317536, 0.0237127115,
0.0388233815, -0.0824996856, 1.0363685997]
cs = create_matrix_colorspace(
'Linear - P3-D60',
from_reference_values=[aces.ACES_AP0_TO_XYZ, XYZ_to_P3D60],
- aliases=["lin_p3d60"])
+ aliases=['lin_p3d60'])
colorspaces.append(cs)
- #
+ # -------------------------------------------------------------------------
# P3-DCI
- #
- # *ACES* to *Linear*, *P3DCI* primaries.
- XYZ_to_P3DCI = [2.7253940305, -1.0180030062, -0.4401631952,
- -0.7951680258, 1.6897320548, 0.0226471906,
- 0.0412418914, -0.0876390192, 1.1009293786]
+ # -------------------------------------------------------------------------
+ # *ACES* to *Linear*, *P3DCI* primaries, using Bradford chromatic
+ # adaptation
+ XYZ_to_P3DCI = [2.66286135, -1.11031783, -0.42271635,
+ -0.82282376, 1.75861704, 0.02502194,
+ 0.03932561, -0.08383448, 1.0372175]
cs = create_matrix_colorspace(
'Linear - P3-DCI',
from_reference_values=[aces.ACES_AP0_TO_XYZ, XYZ_to_P3DCI],
- aliases=["lin_p3dci"])
+ aliases=['lin_p3dci'])
colorspaces.append(cs)
- #
+ # -------------------------------------------------------------------------
# sRGB
- #
- # *ACES* to *Linear*, *Rec. 709* primaries.
- # sRGB and Rec 709 use the same gamut
- XYZ_to_Rec709 = [3.2409699419, -1.5373831776, -0.4986107603,
- -0.9692436363, 1.8759675015, 0.0415550574,
- 0.0556300797, -0.2039769589, 1.0569715142]
+ # -------------------------------------------------------------------------
+ # *sRGB* and *Rec 709* use the same gamut.
+
+ # *ACES* to *Linear*, *Rec. 709* primaries, D65 white point, using
+ # Bradford chromatic adaptation
+ XYZ_to_Rec709 = [3.20959735, -1.55742955, -0.49580497,
+ -0.97098887, 1.88517118, 0.03948941,
+ 0.05971934, -0.21010444, 1.14312482]
cs = create_matrix_colorspace(
'Linear - sRGB',
from_reference_values=[aces.ACES_AP0_TO_XYZ, XYZ_to_Rec709],
- aliases=["lin_srgb"])
+ aliases=['lin_srgb'])
colorspaces.append(cs)
# *Linear* to *sRGB* Transfer Function*
transfer_function_sRGB_to_linear,
lut_directory,
lut_resolution_1d,
- aliases=["crv_srgb"])
+ aliases=['crv_srgb'])
colorspaces.append(cs)
# *ACES* to *sRGB* Primaries + Transfer Function*
cs = create_matrix_plus_transfer_colorspace(
- 'sRGB',
+ 'sRGB - Texture',
'sRGB',
transfer_function_sRGB_to_linear,
lut_directory,
lut_resolution_1d,
from_reference_values=[aces.ACES_AP0_TO_XYZ, XYZ_to_Rec709],
- aliases=["srgb"])
+ aliases=['srgb_texture'])
colorspaces.append(cs)
- #
+ # -------------------------------------------------------------------------
# Rec 709
- #
- # *ACES* to *Linear*, *Rec. 709* primaries.
- XYZ_to_Rec709 = [3.2409699419, -1.5373831776, -0.4986107603,
- -0.9692436363, 1.8759675015, 0.0415550574,
- 0.0556300797, -0.2039769589, 1.0569715142]
-
+ # -------------------------------------------------------------------------
+ # *sRGB* and *Rec 709* use the same gamut.
cs = create_matrix_colorspace(
'Linear - Rec.709',
from_reference_values=[aces.ACES_AP0_TO_XYZ, XYZ_to_Rec709],
- aliases=["lin_rec709"])
+ aliases=['lin_rec709'])
colorspaces.append(cs)
# *Linear* to *Rec. 709* Transfer Function*
transfer_function_Rec709_to_linear,
lut_directory,
lut_resolution_1d,
- aliases=["crv_rec709"])
+ aliases=['crv_rec709'])
colorspaces.append(cs)
# *ACES* to *Rec. 709* Primaries + Transfer Function*
lut_directory,
lut_resolution_1d,
from_reference_values=[aces.ACES_AP0_TO_XYZ, XYZ_to_Rec709],
- aliases=["rec709_camera"])
+ aliases=['rec709_camera'])
colorspaces.append(cs)
- #
+ # -------------------------------------------------------------------------
# Rec 2020
- #
- # *ACES* to *Linear*, *Rec. 2020* primaries.
- XYZ_to_Rec2020 = [1.7166511880, -0.3556707838, -0.2533662814,
- -0.6666843518, 1.6164812366, 0.0157685458,
- 0.0176398574, -0.0427706133, 0.9421031212]
+ # -------------------------------------------------------------------------
+ # *ACES* to *Linear*, *Rec. 2020* primaries, D65 white point, using
+ # Bradford chromatic adaptation
+ XYZ_to_Rec2020 = [1.69662619, -0.36551982, -0.24857099,
+ -0.67039877, 1.62348187, 0.01503821,
+ 0.02063163, -0.04775634, 1.01910818]
cs = create_matrix_colorspace(
'Linear - Rec.2020',
from_reference_values=[aces.ACES_AP0_TO_XYZ, XYZ_to_Rec2020],
- aliases=["lin_rec2020"])
+ aliases=['lin_rec2020'])
colorspaces.append(cs)
# *Linear* to *Rec. 2020 10 bit* Transfer Function*
transfer_function_Rec2020_10bit_to_linear,
lut_directory,
lut_resolution_1d,
- aliases=["crv_rec2020"])
+ aliases=['crv_rec2020'])
colorspaces.append(cs)
# *ACES* to *Rec. 2020 10 bit* Primaries + Transfer Function*
lut_directory,
lut_resolution_1d,
from_reference_values=[aces.ACES_AP0_TO_XYZ, XYZ_to_Rec2020],
- aliases=["rec2020_camera"])
+ aliases=['rec2020_camera'])
colorspaces.append(cs)
- #
+ # -------------------------------------------------------------------------
# Rec 1886
- #
-
+ # -------------------------------------------------------------------------
# *Linear* to *Rec.1886* Transfer Function*
cs = create_transfer_colorspace(
'Curve - Rec.1886',
transfer_function_Rec1886_to_linear,
lut_directory,
lut_resolution_1d,
- aliases=["crv_rec1886"])
+ aliases=['crv_rec1886'])
colorspaces.append(cs)
- # *ACES* to *sRGB* Primaries + Transfer Function*
+ # *ACES* to *Rec. 709* Primaries + Transfer Function*
cs = create_matrix_plus_transfer_colorspace(
'Rec.709 - Display',
'rec1886',
lut_directory,
lut_resolution_1d,
from_reference_values=[aces.ACES_AP0_TO_XYZ, XYZ_to_Rec709],
- aliases=["rec709_display"])
+ aliases=['rec709_display'])
colorspaces.append(cs)
- # *ACES* to *sRGB* Primaries + Transfer Function*
+ # *ACES* to *Rec. 2020* Primaries + Transfer Function*
cs = create_matrix_plus_transfer_colorspace(
'Rec.2020 - Display',
'rec1886',
lut_directory,
lut_resolution_1d,
from_reference_values=[aces.ACES_AP0_TO_XYZ, XYZ_to_Rec2020],
- aliases=["rec2020_display"])
+ aliases=['rec2020_display'])
colorspaces.append(cs)
- #
+ # -------------------------------------------------------------------------
# ProPhoto
- #
- # *ACES* to *Linear*, *Pro Photo* primaries.
+ # -------------------------------------------------------------------------
+ # *ACES* to *Linear*, *Pro Photo* primaries, D50 white point, using
+ # Bradford chromatic adaptation
AP0_to_RIMM = [1.2412367771, -0.1685692287, -0.0726675484,
0.0061203066, 1.083151174, -0.0892714806,
-0.0032853314, 0.0099796402, 0.9933056912]
cs = create_matrix_colorspace(
'Linear - RIMM ROMM (ProPhoto)',
from_reference_values=[AP0_to_RIMM],
- aliases=["lin_prophoto", "lin_rimm"])
+ aliases=['lin_prophoto', 'lin_rimm'])
colorspaces.append(cs)
- #
+ # -------------------------------------------------------------------------
# Adobe RGB
- #
- # *ACES* to *Linear*, *Adobe RGB* primaries.
+ # -------------------------------------------------------------------------
+ # *ACES* to *Linear*, *Adobe RGB* primaries, D65 white point, using
+ # Bradford chromatic adaptation
AP0_to_ADOBERGB = [1.7245603168, -0.4199935942, -0.3045667227,
-0.2764799142, 1.3727190877, -0.0962391734,
-0.0261255258, -0.0901747807, 1.1163003065]
cs = create_matrix_colorspace(
'Linear - Adobe RGB',
from_reference_values=[AP0_to_ADOBERGB],
- aliases=["lin_adobergb"])
+ aliases=['lin_adobergb'])
colorspaces.append(cs)
- #
+ # -------------------------------------------------------------------------
# Adobe Wide Gamut RGB
- #
-
- # *ACES* to *Linear*, *Adobe Wide Gamut RGB* primaries.
- AP0_to_ADOBERGB = [1.3809814778, -0.1158594573, -0.2651220205,
- 0.0057015535, 1.0402949043, -0.0459964578,
- -0.0038908746, -0.0597091815, 1.0636000561]
+ # -------------------------------------------------------------------------
+ # *ACES* to *Linear*, *Adobe Wide Gamut RGB* primaries, D50 white point,
+ # using Bradford chromatic adaptation
+ AP0_to_ADOBEWIDEGAMUT = [1.3809814778, -0.1158594573, -0.2651220205,
+ 0.0057015535, 1.0402949043, -0.0459964578,
+ -0.0038908746, -0.0597091815, 1.0636000561]
cs = create_matrix_colorspace(
'Linear - Adobe Wide Gamut RGB',
- from_reference_values=[AP0_to_ADOBERGB],
- aliases=["lin_adobewidegamutrgb"])
+ from_reference_values=[AP0_to_ADOBEWIDEGAMUT],
+ aliases=['lin_adobewidegamutrgb'])
colorspaces.append(cs)
return colorspaces
def create_raw():
+ """
+ Creates the *raw* color space
+
+ Parameters
+ ----------
+ None
+
+ Returns
+ -------
+ ColorSpace
+ *raw* and all its identifying information
+ """
# *Raw* utility space
- name = "Raw"
+ name = 'Raw'
raw = ColorSpace(name)
raw.description = 'The %s color space' % name
- raw.aliases = ["raw"]
+ raw.aliases = ['raw']
raw.equality_group = name
raw.family = 'Utility'
raw.is_data = True
projects / OpenColorIO-Configs.git / blobdiff