+++ /dev/null
-#!/usr/bin/env python
-# -*- coding: utf-8 -*-
-
-"""
-Implements support for *ARRI* colorspaces conversions and transfer functions.
-"""
-
-import array
-import math
-
-import aces_ocio.generate_lut as genlut
-from aces_ocio.utilities import ColorSpace, mat44_from_mat33
-
-
-__author__ = 'ACES Developers'
-__copyright__ = 'Copyright (C) 2014 - 2015 - ACES Developers'
-__license__ = ''
-__maintainer__ = 'ACES Developers'
-__email__ = 'aces@oscars.org'
-__status__ = 'Production'
-
-__all__ = ['create_log_c',
- 'create_colorspaces']
-
-
-def create_log_c(gamut,
- transfer_function,
- exposure_index,
- name,
- lut_directory,
- lut_resolution_1d):
- """
- Object description.
-
- LogC to ACES.
-
- Parameters
- ----------
- parameter : type
- Parameter description.
-
- Returns
- -------
- type
- Return value description.
- """
-
- name = "%s (EI%s) - %s" % (transfer_function, exposure_index, gamut)
- if transfer_function == "":
- name = "Linear - %s" % gamut
- if gamut == "":
- name = "%s (EI%s)" % (transfer_function, exposure_index)
-
- cs = ColorSpace(name)
- cs.description = name
- cs.equality_group = ''
- cs.family = 'ARRI'
- cs.is_data = False
-
- # Globals
- IDT_maker_version = "0.08"
-
- nominal_EI = 400.0
- black_signal = 0.003907
- mid_gray_signal = 0.01
- encoding_gain = 0.256598
- encoding_offset = 0.391007
-
- def gain_for_EI(EI):
- return (math.log(EI / nominal_EI) / math.log(2) * (
- 0.89 - 1) / 3 + 1) * encoding_gain
-
- def log_c_inverse_parameters_for_EI(EI):
- cut = 1.0 / 9.0
- slope = 1.0 / (cut * math.log(10))
- offset = math.log10(cut) - slope * cut
- gain = EI / nominal_EI
- gray = mid_gray_signal / gain
- # The higher the EI, the lower the gamma
- enc_gain = gain_for_EI(EI)
- enc_offset = encoding_offset
- for i in range(0, 3):
- nz = ((95.0 / 1023.0 - enc_offset) / enc_gain - offset) / slope
- enc_offset = encoding_offset - math.log10(1 + nz) * enc_gain
- # Calculate some intermediate values
- a = 1.0 / gray
- b = nz - black_signal / gray
- e = slope * a * enc_gain
- f = enc_gain * (slope * b + offset) + enc_offset
- # Manipulations so we can return relative exposure
- s = 4 / (0.18 * EI)
- t = black_signal
- b += a * t
- a *= s
- f += e * t
- e *= s
-
- return {'a': a,
- 'b': b,
- 'cut': (cut - b) / a,
- 'c': enc_gain,
- 'd': enc_offset,
- 'e': e,
- 'f': f}
-
- def log_c_to_linear(code_value, exposure_index):
- p = log_c_inverse_parameters_for_EI(exposure_index)
- breakpoint = p['e'] * p['cut'] + p['f']
- if (code_value > breakpoint):
- linear = ((pow(10, (code_value / 1023.0 - p['d']) / p['c']) -
- p['b']) / p['a'])
- else:
- linear = (code_value / 1023.0 - p['f']) / p['e']
-
- # print(codeValue, linear)
- return linear
-
-
- cs.to_reference_transforms = []
-
- if transfer_function == "V3 LogC":
- data = array.array('f', "\0" * lut_resolution_1d * 4)
- for c in range(lut_resolution_1d):
- data[c] = log_c_to_linear(1023.0 * c / (lut_resolution_1d - 1),
- int(exposure_index))
-
- lut = "%s_to_linear.spi1d" % (
- "%s_%s" % (transfer_function, exposure_index))
-
- # Remove spaces and parentheses
- lut = lut.replace(' ', '_').replace(')', '_').replace('(', '_')
-
- genlut.write_SPI_1d(lut_directory + "/" + lut,
- 0.0,
- 1.0,
- data,
- lut_resolution_1d,
- 1)
-
- # print("Writing %s" % lut)
- cs.to_reference_transforms.append({
- 'type': 'lutFile',
- 'path': lut,
- 'interpolation': 'linear',
- 'direction': 'forward'
- })
-
- if gamut == 'Wide Gamut':
- cs.to_reference_transforms.append({
- 'type': 'matrix',
- 'matrix': mat44_from_mat33([0.680206, 0.236137, 0.083658,
- 0.085415, 1.017471, -0.102886,
- 0.002057, -0.062563, 1.060506]),
- 'direction': 'forward'
- })
-
- cs.from_reference_transforms = []
- return cs
-
-
-def create_colorspaces(lut_directory, lut_resolution_1d):
- """
- Generates the colorspace conversions.
-
- Parameters
- ----------
- parameter : type
- Parameter description.
-
- Returns
- -------
- type
- Return value description.
- """
-
- colorspaces = []
-
- transfer_function = "V3 LogC"
- gamut = "Wide Gamut"
-
- # EIs = [160.0, 200.0, 250.0, 320.0, 400.0, 500.0, 640.0, 800.0,
- # 1000.0, 1280.0, 1600.0, 2000.0, 2560.0, 3200.0]
- EIs = [160, 200, 250, 320, 400, 500, 640, 800,
- 1000, 1280, 1600, 2000, 2560, 3200]
- default_EI = 800
-
- # Full conversion
- for EI in EIs:
- log_c_EI_full = create_log_c(
- gamut,
- transfer_function,
- EI,
- "LogC",
- lut_directory,
- lut_resolution_1d)
- colorspaces.append(log_c_EI_full)
-
- # Linearization only
- for EI in [800]:
- log_c_EI_linearization = create_log_c(
- "",
- transfer_function,
- EI,
- "LogC",
- lut_directory,
- lut_resolution_1d)
- colorspaces.append(log_c_EI_linearization)
-
- # Primaries
- log_c_EI_primaries = create_log_c(
- gamut,
- "",
- default_EI,
- "LogC",
- lut_directory,
- lut_resolution_1d)
- colorspaces.append(log_c_EI_primaries)
-
- return colorspaces
+++ /dev/null
-#!/usr/bin/env python
-# -*- coding: utf-8 -*-
-
-"""
-Implements support for *RED* colorspaces conversions and transfer functions.
-"""
-
-import array
-
-import aces_ocio.generate_lut as genlut
-from aces_ocio.utilities import ColorSpace, mat44_from_mat33
-
-__author__ = 'ACES Developers'
-__copyright__ = 'Copyright (C) 2014 - 2015 - ACES Developers'
-__license__ = ''
-__maintainer__ = 'ACES Developers'
-__email__ = 'aces@oscars.org'
-__status__ = 'Production'
-
-__all__ = ['create_RED_log_film',
- 'create_colorspaces']
-
-
-def create_RED_log_film(gamut,
- transfer_function,
- name,
- lut_directory,
- lut_resolution_1d):
- """
- Object description.
-
- RED colorspaces to ACES.
-
- Parameters
- ----------
- parameter : type
- Parameter description.
-
- Returns
- -------
- type
- Return value description.
- """
-
- name = "%s - %s" % (transfer_function, gamut)
- if transfer_function == "":
- name = "Linear - %s" % gamut
- if gamut == "":
- name = "%s" % transfer_function
-
- cs = ColorSpace(name)
- cs.description = name
- cs.equality_group = ''
- cs.family = 'RED'
- cs.is_data = False
-
- def cineon_to_linear(code_value):
- n_gamma = 0.6
- black_point = 95.0
- white_point = 685.0
- code_value_to_density = 0.002
-
- black_linear = pow(10.0, (black_point - white_point) * (
- code_value_to_density / n_gamma))
- code_linear = pow(10.0, (code_value - white_point) * (
- code_value_to_density / n_gamma))
-
- return (code_linear - black_linear) / (1.0 - black_linear)
-
- cs.to_reference_transforms = []
-
- if transfer_function == 'REDlogFilm':
- data = array.array('f', "\0" * lut_resolution_1d * 4)
- for c in range(lut_resolution_1d):
- data[c] = cineon_to_linear(1023.0 * c / (lut_resolution_1d - 1))
-
- lut = "CineonLog_to_linear.spi1d"
- genlut.write_SPI_1d(lut_directory + "/" + lut,
- 0.0,
- 1.0,
- data,
- lut_resolution_1d,
- 1)
-
- cs.to_reference_transforms.append({
- 'type': 'lutFile',
- 'path': lut,
- 'interpolation': 'linear',
- 'direction': 'forward'})
-
- if gamut == 'DRAGONcolor':
- cs.to_reference_transforms.append({
- 'type': 'matrix',
- 'matrix': mat44_from_mat33([0.532279, 0.376648, 0.091073,
- 0.046344, 0.974513, -0.020860,
- -0.053976, -0.000320, 1.054267]),
- 'direction': 'forward'})
- elif gamut == 'DRAGONcolor2':
- cs.to_reference_transforms.append({
- 'type': 'matrix',
- 'matrix': mat44_from_mat33([0.468452, 0.331484, 0.200064,
- 0.040787, 0.857658, 0.101553,
- -0.047504, -0.000282, 1.047756]),
- 'direction': 'forward'})
- elif gamut == 'REDcolor2':
- cs.to_reference_transforms.append({
- 'type': 'matrix',
- 'matrix': mat44_from_mat33([0.480997, 0.402289, 0.116714,
- -0.004938, 1.000154, 0.004781,
- -0.105257, 0.025320, 1.079907]),
- 'direction': 'forward'})
- elif gamut == 'REDcolor3':
- cs.to_reference_transforms.append({
- 'type': 'matrix',
- 'matrix': mat44_from_mat33([0.512136, 0.360370, 0.127494,
- 0.070377, 0.903884, 0.025737,
- -0.020824, 0.017671, 1.003123]),
- 'direction': 'forward'})
- elif gamut == 'REDcolor4':
- cs.to_reference_transforms.append({
- 'type': 'matrix',
- 'matrix': mat44_from_mat33([0.474202, 0.333677, 0.192121,
- 0.065164, 0.836932, 0.097901,
- -0.019281, 0.016362, 1.002889]),
- 'direction': 'forward'})
-
- cs.from_reference_transforms = []
- return cs
-
-
-def create_colorspaces(lut_directory, lut_resolution_1d):
- """
- Generates the colorspace conversions.
-
- Parameters
- ----------
- parameter : type
- Parameter description.
-
- Returns
- -------
- type
- Return value description.
- """
-
- colorspaces = []
-
- # Full conversion
- RED_log_film_dragon = create_RED_log_film(
- "DRAGONcolor",
- "REDlogFilm",
- "REDlogFilm",
- lut_directory,
- lut_resolution_1d)
- colorspaces.append(RED_log_film_dragon)
-
- RED_log_film_dragon2 = create_RED_log_film(
- "DRAGONcolor2",
- "REDlogFilm",
- "REDlogFilm",
- lut_directory,
- lut_resolution_1d)
- colorspaces.append(RED_log_film_dragon2)
-
- RED_log_film_color2 = create_RED_log_film(
- "REDcolor2",
- "REDlogFilm",
- "REDlogFilm",
- lut_directory,
- lut_resolution_1d)
- colorspaces.append(RED_log_film_color2)
-
- RED_log_film_color3 = create_RED_log_film(
- "REDcolor3",
- "REDlogFilm",
- "REDlogFilm",
- lut_directory,
- lut_resolution_1d)
- colorspaces.append(RED_log_film_color3)
-
- RED_log_film_color4 = create_RED_log_film(
- "REDcolor4",
- "REDlogFilm",
- "REDlogFilm",
- lut_directory,
- lut_resolution_1d)
- colorspaces.append(RED_log_film_color4)
-
- # Linearization only
- RED_log_film_dragon = create_RED_log_film(
- "",
- "REDlogFilm",
- "REDlogFilm",
- lut_directory,
- lut_resolution_1d)
- colorspaces.append(RED_log_film_dragon)
-
- # Primaries only
- RED_log_film_dragon = create_RED_log_film(
- "DRAGONcolor",
- "",
- "REDlogFilm",
- lut_directory,
- lut_resolution_1d)
- colorspaces.append(RED_log_film_dragon)
-
- RED_log_film_dragon2 = create_RED_log_film(
- "DRAGONcolor2",
- "",
- "REDlogFilm",
- lut_directory,
- lut_resolution_1d)
- colorspaces.append(RED_log_film_dragon2)
-
- RED_log_film_color2 = create_RED_log_film(
- "REDcolor2",
- "",
- "REDlogFilm",
- lut_directory,
- lut_resolution_1d)
- colorspaces.append(RED_log_film_color2)
-
- RED_log_film_color3 = create_RED_log_film(
- "REDcolor3",
- "",
- "REDlogFilm",
- lut_directory,
- lut_resolution_1d)
- colorspaces.append(RED_log_film_color3)
-
- RED_log_film_color4 = create_RED_log_film(
- "REDcolor4",
- "",
- "REDlogFilm",
- lut_directory,
- lut_resolution_1d)
- colorspaces.append(RED_log_film_color4)
-
- return colorspaces
projects / OpenColorIO-Configs.git / commitdiff