from __future__ import division
+import array
+import os
+
import PyOpenColorIO as ocio
+import aces_ocio.generate_lut as genlut
from aces_ocio.colorspaces import aces
from aces_ocio.utilities import ColorSpace, mat44_from_mat33
__email__ = 'aces@oscars.org'
__status__ = 'Production'
-__all__ = ['create_generic_matrix',
+__all__ = ['create_matrix_colorspace',
'create_colorspaces']
# -------------------------------------------------------------------------
-# *Simple Matrix Transform*
+# *Matrix Transform*
# -------------------------------------------------------------------------
-def create_generic_matrix(name='matrix',
- from_reference_values=None,
- to_reference_values=None,
- aliases=[]):
+def create_matrix_colorspace(name='matrix',
+ from_reference_values=None,
+ to_reference_values=None,
+ aliases=[]):
"""
Object description.
return cs
+# -------------------------------------------------------------------------
+# *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=[]):
+ """
+ Object description.
+
+ Parameters
+ ----------
+ parameter : type
+ Parameter description.
+
+ Returns
+ -------
+ type
+ Return value description.
+ """
+
+ if from_reference_values is None:
+ from_reference_values = []
+
+ if to_reference_values is None:
+ to_reference_values = []
+
+ cs = ColorSpace(name)
+ cs.description = 'The %s color space' % name
+ cs.aliases = aliases
+ cs.equality_group = name
+ cs.family = 'Utility'
+ cs.is_data = False
+
+ # A linear space needs allocation variables
+ cs.allocation_type = ocio.Constants.ALLOCATION_LG2
+ cs.allocation_vars = [-8, 5, 0.00390625]
+
+ # Sample 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
+ lut = '%s_to_linear.spi1d' % transfer_function_name
+ genlut.write_SPI_1d(
+ os.path.join(lut_directory, lut),
+ 0,
+ 1,
+ data,
+ lut_resolution_1d,
+ 1)
+
+ # Create the 'to_reference' transforms
+ cs.to_reference_transforms = []
+ cs.to_reference_transforms.append({
+ 'type': 'lutFile',
+ 'path': lut,
+ 'interpolation': 'linear',
+ 'direction': 'forward'})
+
+ if to_reference_values:
+ for matrix in to_reference_values:
+ cs.to_reference_transforms.append({
+ 'type': 'matrix',
+ 'matrix': mat44_from_mat33(matrix),
+ 'direction': 'forward'})
+
+ # Create the 'from_reference' transforms
+ cs.from_reference_transforms = []
+ if from_reference_values:
+ for matrix in from_reference_values:
+ cs.from_reference_transforms.append({
+ 'type': 'matrix',
+ 'matrix': mat44_from_mat33(matrix),
+ 'direction': 'forward'})
+
+ cs.from_reference_transforms.append({
+ 'type': 'lutFile',
+ 'path': lut,
+ 'interpolation': 'linear',
+ 'direction': 'inverse'})
+
+ return cs
+
+# Transfer functions for standard color spaces
+def transfer_function_sRGB_to_linear(v):
+ a = 1.055
+ b = 0.04045
+ d = 12.92
+ g = 2.4
+
+ if v < b:
+ return v/d
+ return pow(((v + (a - 1)) / a), g)
+
+def transfer_function_Rec709_to_linear(v):
+ a = 1.099
+ b = 0.018
+ d = 4.5
+ g = (1.0/0.45)
+
+ if v < b:
+ return v/d
+
+ return pow(((v + (a - 1)) / a), g)
+
+def transfer_function_Rec2020_10bit_to_linear(v):
+ a = 1.099
+ b = 0.018
+ d = 4.5
+ g = (1.0/0.45)
+
+ if v < b:
+ return v/d
+
+ return pow(((v + (a - 1)) / a), g)
+
+def transfer_function_Rec2020_12bit_to_linear(v):
+ a = 1.0993
+ b = 0.0181
+ d = 4.5
+ g = (1.0/0.45)
+
+ if v < b:
+ return v/d
+
+ return pow(((v + (a - 1)) / a), g)
+
+def transfer_function_Rec1886_to_linear(v):
+ g = 2.4
+ Lw = 1
+ Lb = 0
+
+ # 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)
+ a = pow(t, g)
+ b = pow(Lb, 1.0/g)/t
+
+ return a*pow(max((v + b), 0.0), g)
def create_colorspaces(lut_directory,
lut_resolution_1d,
colorspaces = []
- cs = create_generic_matrix('XYZ',
+ #
+ # XYZ
+ #
+ cs = create_matrix_colorspace('XYZ',
to_reference_values=[aces.ACES_XYZ_TO_AP0],
from_reference_values=[aces.ACES_AP0_TO_XYZ],
aliases=["lin_xyz"])
colorspaces.append(cs)
- cs = create_generic_matrix(
+ #
+ # AP1
+ #
+ cs = create_matrix_colorspace(
'Linear - AP1',
to_reference_values=[aces.ACES_AP1_TO_AP0],
from_reference_values=[aces.ACES_AP0_TO_AP1],
aliases=["lin_ap1"])
colorspaces.append(cs)
+ #
+ # P3-D60
+ #
# *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_generic_matrix(
+ cs = create_matrix_colorspace(
'Linear - P3-D60',
from_reference_values=[aces.ACES_AP0_TO_XYZ, XYZ_to_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]
- cs = create_generic_matrix(
+ cs = create_matrix_colorspace(
'Linear - P3-DCI',
from_reference_values=[aces.ACES_AP0_TO_XYZ, XYZ_to_P3DCI],
aliases=["lin_p3dci"])
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]
- cs = create_generic_matrix(
+ cs = create_matrix_colorspace(
'Linear - Rec.709',
from_reference_values=[aces.ACES_AP0_TO_XYZ, XYZ_to_Rec709],
aliases=["lin_rec709"])
colorspaces.append(cs)
+ # *Linear* to *Rec. 709* Transfer Function*
+ cs = create_matrix_plus_transfer_colorspace(
+ 'Curve - Rec.709',
+ 'rec709',
+ transfer_function_Rec709_to_linear,
+ lut_directory,
+ lut_resolution_1d,
+ aliases=["crv_rec709"])
+ colorspaces.append(cs)
+
+ # *ACES* to *Rec. 709* Primaries + Transfer Function*
+ cs = create_matrix_plus_transfer_colorspace(
+ 'Rec.709',
+ 'rec709',
+ transfer_function_Rec709_to_linear,
+ lut_directory,
+ lut_resolution_1d,
+ from_reference_values=[aces.ACES_AP0_TO_XYZ, XYZ_to_Rec709],
+ aliases=["rec709"])
+ 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]
+
+ cs = create_matrix_colorspace(
+ 'Linear - sRGB',
+ from_reference_values=[aces.ACES_AP0_TO_XYZ, XYZ_to_Rec709],
+ aliases=["lin_sRGB"])
+ colorspaces.append(cs)
+
+ # *Linear* to *sRGB* Transfer Function*
+ cs = create_matrix_plus_transfer_colorspace(
+ 'Curve - sRGB',
+ 'sRGB',
+ transfer_function_sRGB_to_linear,
+ lut_directory,
+ lut_resolution_1d,
+ aliases=["crv_sRGB"])
+ colorspaces.append(cs)
+
+ # *ACES* to *sRGB* Primaries + Transfer Function*
+ cs = create_matrix_plus_transfer_colorspace(
+ 'sRGB',
+ 'sRGB',
+ transfer_function_sRGB_to_linear,
+ lut_directory,
+ lut_resolution_1d,
+ from_reference_values=[aces.ACES_AP0_TO_XYZ, XYZ_to_Rec709],
+ aliases=["sRGB"])
+ colorspaces.append(cs)
+
+ #
+ # Rec 1886
+ #
+ # *ACES* to *Linear*, *Rec. 709* primaries.
+ # Rec 1886 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]
+
+ cs = create_matrix_colorspace(
+ 'Linear - Rec.1886',
+ from_reference_values=[aces.ACES_AP0_TO_XYZ, XYZ_to_Rec709],
+ aliases=["lin_rec1886"])
+ colorspaces.append(cs)
+
+ # *Linear* to *sRGB* Transfer Function*
+ cs = create_matrix_plus_transfer_colorspace(
+ 'Curve - Rec.1886',
+ 'rec1886',
+ transfer_function_Rec1886_to_linear,
+ lut_directory,
+ lut_resolution_1d,
+ aliases=["crv_rec1886"])
+ colorspaces.append(cs)
+
+ # *ACES* to *sRGB* Primaries + Transfer Function*
+ cs = create_matrix_plus_transfer_colorspace(
+ 'Rec.1886',
+ 'rec1886',
+ transfer_function_Rec1886_to_linear,
+ lut_directory,
+ lut_resolution_1d,
+ from_reference_values=[aces.ACES_AP0_TO_XYZ, XYZ_to_Rec709],
+ aliases=["rec1886"])
+ 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]
- cs = create_generic_matrix(
+ cs = create_matrix_colorspace(
'Linear - Rec.2020',
from_reference_values=[aces.ACES_AP0_TO_XYZ, XYZ_to_Rec2020],
aliases=["lin_rec2020"])
colorspaces.append(cs)
+ # *Linear* to *Rec. 2020 10 bit* Transfer Function*
+ cs = create_matrix_plus_transfer_colorspace(
+ 'Curve - Rec.2020 - 10 bit',
+ 'rec2020',
+ transfer_function_Rec2020_10bit_to_linear,
+ lut_directory,
+ lut_resolution_1d,
+ aliases=["crv_rec202010bit"])
+ colorspaces.append(cs)
+
+ # *ACES* to *Rec. 2020 10 bit* Primaries + Transfer Function*
+ cs = create_matrix_plus_transfer_colorspace(
+ 'Rec.2020 10 bit - Rec.2020',
+ 'rec2020',
+ transfer_function_Rec2020_10bit_to_linear,
+ lut_directory,
+ lut_resolution_1d,
+ from_reference_values=[aces.ACES_AP0_TO_XYZ, XYZ_to_Rec2020],
+ aliases=["rec202010bit"])
+ colorspaces.append(cs)
+
+ # *Linear* to *Rec. 2020 10 bit* Transfer Function*
+ cs = create_matrix_plus_transfer_colorspace(
+ 'Curve - Rec.2020 - 12 bit',
+ 'rec2020',
+ transfer_function_Rec2020_12bit_to_linear,
+ lut_directory,
+ lut_resolution_1d,
+ aliases=["crv_rec202012bit"])
+ colorspaces.append(cs)
+
+ # *ACES* to *Rec. 2020 10 bit* Primaries + Transfer Function*
+ cs = create_matrix_plus_transfer_colorspace(
+ 'Rec.2020 12 bit - Rec.2020',
+ 'rec2020',
+ transfer_function_Rec2020_12bit_to_linear,
+ lut_directory,
+ lut_resolution_1d,
+ from_reference_values=[aces.ACES_AP0_TO_XYZ, XYZ_to_Rec2020],
+ aliases=["rec202012bit"])
+ colorspaces.append(cs)
+
+ #
+ # ProPhoto
+ #
# *ACES* to *Linear*, *Pro Photo* primaries.
AP0_to_RIMM = [1.2412367771, -0.1685692287, -0.0726675484,
0.0061203066, 1.083151174, -0.0892714806,
-0.0032853314, 0.0099796402, 0.9933056912]
- cs = create_generic_matrix(
+ cs = create_matrix_colorspace(
'Linear - RIMM ROMM (ProPhoto)',
from_reference_values=[AP0_to_RIMM],
aliases=["lin_prophoto", "lin_rimm"])
colorspaces.append(cs)
+ #
+ # Adobe RGB
+ #
# *ACES* to *Linear*, *Adobe RGB* primaries.
AP0_to_ADOBERGB = [1.7245603168, -0.4199935942, -0.3045667227,
-0.2764799142, 1.3727190877, -0.0962391734,
-0.0261255258, -0.0901747807, 1.1163003065]
- cs = create_generic_matrix(
+ cs = create_matrix_colorspace(
'Linear - Adobe RGB',
from_reference_values=[AP0_to_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]
- cs = create_generic_matrix(
+ cs = create_matrix_colorspace(
'Linear - Adobe Wide Gamut RGB',
from_reference_values=[AP0_to_ADOBERGB],
aliases=["lin_adobewidegamutrgb"])
projects / OpenColorIO-Configs.git / blobdiff