from aces_ocio.colorspaces import aces
from aces_ocio.utilities import ColorSpace, mat44_from_mat33
-
__author__ = 'ACES Developers'
__copyright__ = 'Copyright (C) 2014 - 2015 - ACES Developers'
__license__ = ''
__all__ = ['create_matrix_colorspace',
'create_colorspaces']
+
# -------------------------------------------------------------------------
# *Matrix Transform*
# -------------------------------------------------------------------------
cs.is_data = False
# A linear space needs allocation variables
- cs.allocation_type = ocio.Constants.ALLOCATION_LG2
- cs.allocation_vars = [-8, 5, 0.00390625]
+ cs.allocation_type = ocio.Constants.ALLOCATION_UNIFORM
+ cs.allocation_vars = [0, 1]
cs.to_reference_transforms = []
if to_reference_values:
return cs
+
# -------------------------------------------------------------------------
-# *Matrix Transform*
+# *Transfer Function Transform*
+# -------------------------------------------------------------------------
+def create_transfer_colorspace(name='transfer',
+ transfer_function_name='transfer_function',
+ transfer_function=lambda x: x,
+ lut_directory='/tmp',
+ lut_resolution_1d=1024,
+ aliases=[]):
+ """
+ Object description.
+
+ Parameters
+ ----------
+ parameter : type
+ Parameter description.
+
+ Returns
+ -------
+ type
+ Return value description.
+ """
+
+ 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_UNIFORM
+ cs.allocation_vars = [0, 1]
+
+ # 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'})
+
+ # Create 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',
cs.is_data = False
# A linear space needs allocation variables
- cs.allocation_type = ocio.Constants.ALLOCATION_LG2
- cs.allocation_vars = [-8, 5, 0.00390625]
+ cs.allocation_type = ocio.Constants.ALLOCATION_UNIFORM
+ cs.allocation_vars = [0, 1]
# Sample the transfer function
data = array.array('f', '\0' * lut_resolution_1d * 4)
# 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:
+ cs.to_reference_transforms.append({
+ 'type': 'lutFile',
+ 'path': lut,
+ 'interpolation': 'linear',
+ 'direction': 'forward'})
+
for matrix in to_reference_values:
cs.to_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'})
+ cs.from_reference_transforms.append({
+ 'type': 'lutFile',
+ 'path': lut,
+ 'interpolation': 'linear',
+ 'direction': 'inverse'})
return cs
+
+# create_matrix_plus_transfer_colorspace
+
# Transfer functions for standard color spaces
def transfer_function_sRGB_to_linear(v):
a = 1.055
g = 2.4
if v < b:
- return v/d
+ 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)
+ g = (1.0 / 0.45)
- if v < b:
- return v/d
+ if v < b * d:
+ 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)
+ g = (1.0 / 0.45)
- if v < b:
- return v/d
+ if v < b * d:
+ 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)
+ g = (1.0 / 0.45)
- if v < b:
- return v/d
+ if v < b * d:
+ 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
+ # v = (1023.0*v - 64.0)/876.0
- t = pow(Lw, 1.0/g) - pow(Lb, 1.0/g)
+ t = pow(Lw, 1.0 / g) - pow(Lb, 1.0 / g)
a = pow(t, g)
- b = pow(Lb, 1.0/g)/t
+ b = pow(Lb, 1.0 / g) / t
+
+ return a * pow(max((v + b), 0.0), g)
- return a*pow(max((v + b), 0.0), g)
def create_colorspaces(lut_directory,
lut_resolution_1d,
#
# 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)
-
- #
- # 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"])
+ 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"])
colorspaces.append(cs)
#
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_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.
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*
- cs = create_matrix_plus_transfer_colorspace(
+ cs = create_transfer_colorspace(
'Curve - sRGB',
'sRGB',
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*
lut_directory,
lut_resolution_1d,
from_reference_values=[aces.ACES_AP0_TO_XYZ, XYZ_to_Rec709],
- aliases=["sRGB"])
+ aliases=["srgb"])
colorspaces.append(cs)
#
- # Rec 1886
+ # Rec 709
#
# *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',
+ 'Linear - Rec.709',
from_reference_values=[aces.ACES_AP0_TO_XYZ, XYZ_to_Rec709],
- aliases=["lin_rec1886"])
+ aliases=["lin_rec709"])
colorspaces.append(cs)
- # *Linear* to *sRGB* Transfer Function*
- cs = create_matrix_plus_transfer_colorspace(
- 'Curve - Rec.1886',
- 'rec1886',
- transfer_function_Rec1886_to_linear,
+ # *Linear* to *Rec. 709* Transfer Function*
+ cs = create_transfer_colorspace(
+ 'Curve - Rec.709',
+ 'rec709',
+ transfer_function_Rec709_to_linear,
lut_directory,
lut_resolution_1d,
- aliases=["crv_rec1886"])
+ aliases=["crv_rec709"])
colorspaces.append(cs)
- # *ACES* to *sRGB* Primaries + Transfer Function*
+ # *ACES* to *Rec. 709* Primaries + Transfer Function*
cs = create_matrix_plus_transfer_colorspace(
- 'Rec.1886',
- 'rec1886',
- transfer_function_Rec1886_to_linear,
+ 'Rec.709 - Camera',
+ 'rec709',
+ transfer_function_Rec709_to_linear,
lut_directory,
lut_resolution_1d,
from_reference_values=[aces.ACES_AP0_TO_XYZ, XYZ_to_Rec709],
- aliases=["rec1886"])
+ aliases=["rec709_camera"])
colorspaces.append(cs)
#
colorspaces.append(cs)
# *Linear* to *Rec. 2020 10 bit* Transfer Function*
- cs = create_matrix_plus_transfer_colorspace(
- 'Curve - Rec.2020 - 10 bit',
+ cs = create_transfer_colorspace(
+ 'Curve - Rec.2020',
'rec2020',
transfer_function_Rec2020_10bit_to_linear,
lut_directory,
lut_resolution_1d,
- aliases=["crv_rec202010bit"])
+ aliases=["crv_rec2020"])
colorspaces.append(cs)
# *ACES* to *Rec. 2020 10 bit* Primaries + Transfer Function*
cs = create_matrix_plus_transfer_colorspace(
- 'Rec.2020 10 bit - Rec.2020',
+ 'Rec.2020 - Camera',
'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"])
+ aliases=["rec2020_camera"])
colorspaces.append(cs)
- # *Linear* to *Rec. 2020 10 bit* Transfer Function*
+ #
+ # Rec 1886
+ #
+
+ # *Linear* to *Rec.1886* Transfer Function*
+ cs = create_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(
- 'Curve - Rec.2020 - 12 bit',
- 'rec2020',
- transfer_function_Rec2020_12bit_to_linear,
+ 'Rec.709 - Display',
+ 'rec1886',
+ transfer_function_Rec1886_to_linear,
lut_directory,
lut_resolution_1d,
- aliases=["crv_rec202012bit"])
+ from_reference_values=[aces.ACES_AP0_TO_XYZ, XYZ_to_Rec709],
+ aliases=["rec709_display"])
colorspaces.append(cs)
- # *ACES* to *Rec. 2020 10 bit* Primaries + Transfer Function*
+ # *ACES* to *sRGB* Primaries + Transfer Function*
cs = create_matrix_plus_transfer_colorspace(
- 'Rec.2020 12 bit - Rec.2020',
- 'rec2020',
- transfer_function_Rec2020_12bit_to_linear,
+ 'Rec.2020 - Display',
+ 'rec1886',
+ transfer_function_Rec1886_to_linear,
lut_directory,
lut_resolution_1d,
from_reference_values=[aces.ACES_AP0_TO_XYZ, XYZ_to_Rec2020],
- aliases=["rec202012bit"])
+ aliases=["rec2020_display"])
colorspaces.append(cs)
#
name = "Raw"
raw = ColorSpace(name)
raw.description = 'The %s color space' % name
- raw.aliases = []
+ raw.aliases = ["raw"]
raw.equality_group = name
raw.family = 'Utility'
raw.is_data = True
return raw
-
-
projects / OpenColorIO-Configs.git / blobdiff