def read_LUT_UnorderedSonySPI3D(path):
title = path_to_title(path)
domain_min, domain_max = np.array([0, 0, 0]), np.array([1, 1, 1])
size = 2
indexes = []
table = []
comments = []
with open(path) as spi3d_file:
lines = filter(None, (line.strip() for line in spi3d_file.readlines()))
for line in lines:
if line.startswith('#'):
comments.append(line[1:].strip())
continue
tokens = line.split()
if len(tokens) == 3:
assert len(set(tokens)) == 1, (
'Non-uniform "LUT" shape is unsupported!')
size = DEFAULT_INT_DTYPE(tokens[0])
if len(tokens) == 6:
indexes.append(as_int_array(tokens[:3]))
table.append(as_float_array(tokens[3:]))
indexes = as_int_array(indexes)
sorting_indexes = np.lexsort((indexes[:, 2], indexes[:, 1], indexes[:, 0]))
#print(sorting_indexes)
assert np.array_equal(
indexes[sorting_indexes],
DEFAULT_INT_DTYPE(np.around(
LUT3D.linear_table(size) * (size - 1))).reshape(
(-1, 3))), 'Indexes do not match expected "LUT3D" indexes!'
table = as_float_array(table)[sorting_indexes].reshape(
[size, size, size, 3])
return LUT3D(table,
title,
np.vstack([domain_min, domain_max]),
comments=comments)
def setUp(self):
"""Initialise the common tests attributes."""
self._LUT_1 = LUT1D(LUT1D.linear_table(16) + 0.125, "Nemo 1D")
self._LUT_2 = LUT3D(LUT3D.linear_table(16)**(1 / 2.2), "Nemo 3D")
self._LUT_3 = LUT3x1D(LUT3x1D.linear_table(16) * 0.750, "Nemo 3x1D")
self._LUT_sequence = LUTSequence(self._LUT_1, self._LUT_2, self._LUT_3)
samples = np.linspace(0, 1, 5)
self._RGB = tstack([samples, samples, samples])
def read_unordered_LUT_SonySPI3D(path):
"""
Reads given unordered *.spi3d* *LUT* file.
Parameters
----------
path : unicode
*LUT* path.
Returns
-------
LUT3D or LUT3x1D
:class:`LUT3D` or :class:`LUT3x1D` class instance.
"""
title = path_to_title(path)
domain_min, domain_max = np.array([0, 0, 0]), np.array([1, 1, 1])
indexes = []
comments = []
table_unordered = []
table_ordered = []
with open(path) as spi3d_file:
lines = filter(None, (line.strip() for line in spi3d_file.readlines()))
for line in lines:
if line.startswith('#'):
comments.append(line[1:].strip())
continue
tokens = line.split()
if len(tokens) == 3:
size = DEFAULT_INT_DTYPE(tokens[0])
if len(tokens) == 6:
indexes.append(as_int_array(tokens[:3]))
table_unordered.append(as_float_array(tokens[3:]))
test_indexes = np.around(LUT3D.linear_table(size) * (size - 1)).reshape(
(-1, 3))
for i in range(64):
for j in range(64):
if (np.array_equal(test_indexes[i], indexes[j])):
table_ordered.append(table_unordered[j])
table_ordered = as_float_array(table_ordered).reshape(
[size, size, size, 3])
return LUT3D(table_ordered,
title,
np.vstack([domain_min, domain_max]),
comments=comments)
def read_LUT_IridasCube(path):
"""
Reads given *Iridas* *.cube* *LUT* file.
Parameters
----------
path : unicode
*LUT* path.
Returns
-------
LUT3x1D or LUT3d
:class:`LUT3x1D` or :class:`LUT3D` class instance.
References
----------
:cite:`AdobeSystems2013b`
Examples
--------
Reading a 3x1D *Iridas* *.cube* *LUT*:
>>> import os
>>> path = os.path.join(
... os.path.dirname(__file__), 'tests', 'resources', 'iridas_cube',
... 'ACES_Proxy_10_to_ACES.cube')
>>> print(read_LUT_IridasCube(path))
LUT3x1D - ACES Proxy 10 to ACES
-------------------------------
<BLANKLINE>
Dimensions : 2
Domain : [[ 0. 0. 0.]
[ 1. 1. 1.]]
Size : (32, 3)
Reading a 3D *Iridas* *.cube* *LUT*:
>>> path = os.path.join(
... os.path.dirname(__file__), 'tests', 'resources', 'iridas_cube',
... 'ColourCorrect.cube')
>>> print(read_LUT_IridasCube(path))
LUT3D - Generated by Foundry::LUT
---------------------------------
<BLANKLINE>
Dimensions : 3
Domain : [[ 0. 0. 0.]
[ 1. 1. 1.]]
Size : (4, 4, 4, 3)
Reading a 3D *Iridas* *.cube* *LUT* with comments:
>>> path = os.path.join(
... os.path.dirname(__file__), 'tests', 'resources', 'iridas_cube',
... 'Demo.cube')
>>> print(read_LUT_IridasCube(path))
LUT3x1D - Demo
--------------
<BLANKLINE>
Dimensions : 2
Domain : [[ 0. 0. 0.]
[ 1. 2. 3.]]
Size : (3, 3)
Comment 01 : Comments can go anywhere
"""
title = path_to_title(path)
domain_min, domain_max = np.array([0, 0, 0]), np.array([1, 1, 1])
dimensions = 3
size = 2
table = []
comments = []
with open(path) as cube_file:
lines = cube_file.readlines()
for line in lines:
line = line.strip()
if len(line) == 0:
continue
if line.startswith('#'):
comments.append(line[1:].strip())
continue
tokens = line.split()
if tokens[0] == 'TITLE':
title = ' '.join(tokens[1:])[1:-1]
elif tokens[0] == 'DOMAIN_MIN':
domain_min = parse_array(tokens[1:])
elif tokens[0] == 'DOMAIN_MAX':
domain_max = parse_array(tokens[1:])
elif tokens[0] == 'LUT_1D_SIZE':
dimensions = 2
size = DEFAULT_INT_DTYPE(tokens[1])
elif tokens[0] == 'LUT_3D_SIZE':
dimensions = 3
size = DEFAULT_INT_DTYPE(tokens[1])
else:
table.append(parse_array(tokens))
table = as_float_array(table)
if dimensions == 2:
return LUT3x1D(table,
title,
np.vstack([domain_min, domain_max]),
comments=comments)
elif dimensions == 3:
# The lines of table data shall be in ascending index order,
# with the first component index (Red) changing most rapidly,
# and the last component index (Blue) changing least rapidly.
table = table.reshape([size, size, size, 3], order='F')
return LUT3D(table,
title,
np.vstack([domain_min, domain_max]),
comments=comments)
def read_LUT_SonySPI3D(path):
"""
Reads given *Sony* *.spi3d* *LUT* file.
Parameters
----------
path : unicode
*LUT* path.
Returns
-------
LUT3D or LUT3x1D
:class:`LUT3D` or :class:`LUT3x1D` class instance.
Examples
--------
Reading a 3D *Sony* *.spi3d* *LUT*:
>>> import os
>>> path = os.path.join(
... os.path.dirname(__file__), 'tests', 'resources', 'sony_spi3d',
... 'ColourCorrect.spi3d')
>>> print(read_LUT_SonySPI3D(path))
LUT3D - ColourCorrect
---------------------
<BLANKLINE>
Dimensions : 3
Domain : [[ 0. 0. 0.]
[ 1. 1. 1.]]
Size : (4, 4, 4, 3)
Comment 01 : Adapted from a LUT generated by Foundry::LUT.
"""
title = path_to_title(path)
domain_min, domain_max = np.array([0, 0, 0]), np.array([1, 1, 1])
size = 2
indexes = []
table = []
comments = []
with open(path) as spi3d_file:
lines = spi3d_file.readlines()
for line in lines:
line = line.strip()
if len(line) == 0:
continue
if line.startswith('#'):
comments.append(line[1:].strip())
continue
tokens = line.split()
if len(tokens) == 3:
assert len(set(tokens)) == 1, (
'Non-uniform "LUT" shape is unsupported!')
size = DEFAULT_INT_DTYPE(tokens[0])
if len(tokens) == 6:
indexes.append(parse_array(tokens[:3]))
table.append(parse_array(tokens[3:]))
assert np.array_equal(
indexes,
DEFAULT_INT_DTYPE(LUT3D.linear_table(size) * (size - 1)).reshape(
(-1, 3))), 'Indexes do not match expected "LUT3D" indexes!'
table = as_float_array(table).reshape([size, size, size, 3])
return LUT3D(table,
title,
np.vstack([domain_min, domain_max]),
comments=comments)
def read_LUT_ResolveCube(path):
"""
Reads given *Resolve* *.cube* *LUT* file.
Parameters
----------
path : unicode
*LUT* path.
Returns
-------
LUT3x1D or LUT3D or LUTSequence
:class:`LUT3x1D` or :class:`LUT3D` or :class:`LUTSequence` class
instance.
References
----------
:cite:`Chamberlain2015`
Examples
--------
Reading a 3x1D *Resolve* *.cube* *LUT*:
>>> import os
>>> path = os.path.join(
... os.path.dirname(__file__), 'tests', 'resources', 'resolve_cube',
... 'ACES_Proxy_10_to_ACES.cube')
>>> print(read_LUT_ResolveCube(path))
LUT3x1D - ACES Proxy 10 to ACES
-------------------------------
<BLANKLINE>
Dimensions : 2
Domain : [[ 0. 0. 0.]
[ 1. 1. 1.]]
Size : (32, 3)
Reading a 3D *Resolve* *.cube* *LUT*:
>>> path = os.path.join(
... os.path.dirname(__file__), 'tests', 'resources', 'resolve_cube',
... 'Colour_Correct.cube')
>>> print(read_LUT_ResolveCube(path))
LUT3D - Generated by Foundry::LUT
---------------------------------
<BLANKLINE>
Dimensions : 3
Domain : [[ 0. 0. 0.]
[ 1. 1. 1.]]
Size : (4, 4, 4, 3)
Reading a 3D *Resolve* *.cube* *LUT* with comments:
>>> path = os.path.join(
... os.path.dirname(__file__), 'tests', 'resources', 'resolve_cube',
... 'Demo.cube')
>>> print(read_LUT_ResolveCube(path))
LUT3x1D - Demo
--------------
<BLANKLINE>
Dimensions : 2
Domain : [[ 0. 0. 0.]
[ 3. 3. 3.]]
Size : (3, 3)
Comment 01 : Comments can't go anywhere
Reading a 3x1D + 3D *Resolve* *.cube* *LUT*:
>>> path = os.path.join(
... os.path.dirname(__file__), 'tests', 'resources', 'resolve_cube',
... 'Three_Dimensional_Table_With_Shaper.cube')
>>> print(read_LUT_ResolveCube(path))
LUT Sequence
------------
<BLANKLINE>
Overview
<BLANKLINE>
LUT3x1D ---> LUT3D
<BLANKLINE>
Operations
<BLANKLINE>
LUT3x1D - LUT3D with My Shaper - Shaper
---------------------------------------
<BLANKLINE>
Dimensions : 2
Domain : [[-0.1 -0.1 -0.1]
[ 3. 3. 3. ]]
Size : (10, 3)
<BLANKLINE>
LUT3D - LUT3D with My Shaper - Cube
-----------------------------------
<BLANKLINE>
Dimensions : 3
Domain : [[-0.1 -0.1 -0.1]
[ 3. 3. 3. ]]
Size : (3, 3, 3, 3)
Comment 01 : A first "Shaper" comment.
Comment 02 : A second "Shaper" comment.
Comment 03 : A first "LUT3D" comment.
Comment 04 : A second "LUT3D" comment.
"""
title = path_to_title(path)
size_3x1D = size_3D = 2
table = []
comments = []
has_3x1D, has_3D = False, False
with open(path) as cube_file:
lines = cube_file.readlines()
LUT = LUTSequence(LUT3x1D(), LUT3D())
for line in lines:
line = line.strip()
if len(line) == 0:
continue
if line.startswith('#'):
comments.append(line[1:].strip())
continue
tokens = line.split()
if tokens[0] == 'TITLE':
title = ' '.join(tokens[1:])[1:-1]
elif tokens[0] == 'LUT_1D_INPUT_RANGE':
domain = parse_array(tokens[1:])
LUT[0].domain = tstack([domain, domain, domain])
elif tokens[0] == 'LUT_3D_INPUT_RANGE':
domain = parse_array(tokens[1:])
LUT[1].domain = tstack([domain, domain, domain])
elif tokens[0] == 'LUT_1D_SIZE':
has_3x1D = True
size_3x1D = np.int_(tokens[1])
elif tokens[0] == 'LUT_3D_SIZE':
has_3D = True
size_3D = np.int_(tokens[1])
else:
table.append(parse_array(tokens))
table = as_float_array(table)
if has_3x1D and has_3D:
LUT[0].name = '{0} - Shaper'.format(title)
LUT[1].name = '{0} - Cube'.format(title)
LUT[1].comments = comments
LUT[0].table = table[:size_3x1D]
# The lines of table data shall be in ascending index order,
# with the first component index (Red) changing most rapidly,
# and the last component index (Blue) changing least rapidly.
LUT[1].table = table[size_3x1D:].reshape(
(size_3D, size_3D, size_3D, 3), order='F')
return LUT
elif has_3x1D:
LUT[0].name = title
LUT[0].comments = comments
LUT[0].table = table
return LUT[0]
elif has_3D:
LUT[1].name = title
LUT[1].comments = comments
# The lines of table data shall be in ascending index order,
# with the first component index (Red) changing most rapidly,
# and the last component index (Blue) changing least rapidly.
table = table.reshape([size_3D, size_3D, size_3D, 3], order='F')
LUT[1].table = table
return LUT[1]
def write_LUT_ResolveCube(LUT, path, decimals=7):
"""
Writes given *LUT* to given *Resolve* *.cube* *LUT* file.
Parameters
----------
LUT : LUT1D or LUT3x1D or LUT3D or LUTSequence
:class:`LUT1D`, :class:`LUT3x1D` or :class:`LUT3D` or
:class:`LUTSequence` class instance to write at given path.
path : unicode
*LUT* path.
decimals : int, optional
Formatting decimals.
Returns
-------
bool
Definition success.
References
----------
:cite:`Chamberlain2015`
Examples
--------
Writing a 3x1D *Resolve* *.cube* *LUT*:
>>> from colour.algebra import spow
>>> domain = np.array([[-0.1, -0.1, -0.1], [3.0, 3.0, 3.0]])
>>> LUT = LUT3x1D(
... spow(LUT3x1D.linear_table(16, domain), 1 / 2.2),
... 'My LUT',
... domain,
... comments=['A first comment.', 'A second comment.'])
>>> write_LUT_ResolveCube(LUT, 'My_LUT.cube') # doctest: +SKIP
Writing a 3D *Resolve* *.cube* *LUT*:
>>> domain = np.array([[-0.1, -0.1, -0.1], [3.0, 3.0, 3.0]])
>>> LUT = LUT3D(
... spow(LUT3D.linear_table(16, domain), 1 / 2.2),
... 'My LUT',
... domain,
... comments=['A first comment.', 'A second comment.'])
>>> write_LUT_ResolveCube(LUT, 'My_LUT.cube') # doctest: +SKIP
Writing a 3x1D + 3D *Resolve* *.cube* *LUT*:
>>> from colour.models import RGB_to_HSV, HSV_to_RGB
>>> from colour.utilities import tstack
>>> def rotate_hue(a, angle):
... H, S, V = RGB_to_HSV(a)
... H += angle / 360
... H[H > 1] -= 1
... H[H < 0] += 1
... return HSV_to_RGB([H, S, V])
>>> domain = np.array([[-0.1, -0.1, -0.1], [3.0, 3.0, 3.0]])
>>> shaper = LUT3x1D(
... spow(LUT3x1D.linear_table(10, domain), 1 / 2.2),
... 'My Shaper',
... domain,
... comments=[
... 'A first "Shaper" comment.', 'A second "Shaper" comment.'])
>>> LUT = LUT3D(
... rotate_hue(LUT3D.linear_table(3, domain), 10),
... 'LUT3D with My Shaper',
... domain,
... comments=['A first "LUT3D" comment.', 'A second "LUT3D" comment.'])
>>> LUT_sequence = LUTSequence(shaper, LUT)
>>> write_LUT_ResolveCube(LUT_sequence, 'My_LUT.cube') # doctest: +SKIP
"""
has_3D, has_3x1D = False, False
if isinstance(LUT, LUTSequence):
assert (len(LUT) == 2 and isinstance(LUT[0], (LUT1D, LUT3x1D))
and isinstance(LUT[1], LUT3D)), (
'LUTSequence must be 1D + 3D or 3x1D + 3D!')
if isinstance(LUT[0], LUT1D):
LUT[0] = LUT[0].as_LUT(LUT3x1D)
has_3x1D = True
has_3D = True
name = LUT[1].name
elif isinstance(LUT, LUT1D):
name = LUT.name
LUT = LUTSequence(LUT.as_LUT(LUT3x1D), LUT3D())
has_3x1D = True
elif isinstance(LUT, LUT3x1D):
name = LUT.name
LUT = LUTSequence(LUT, LUT3D())
has_3x1D = True
elif isinstance(LUT, LUT3D):
name = LUT.name
LUT = LUTSequence(LUT3x1D(), LUT)
has_3D = True
else:
raise ValueError('LUT must be 1D, 3x1D, 3D, 1D + 3D or 3x1D + 3D!')
for i in range(2):
assert not LUT[i].is_domain_explicit(), (
'"LUT" domain must be implicit!')
assert (len(np.unique(LUT[0].domain)) == 2
and len(np.unique(LUT[1].domain)) == 2), 'LUT domain must be 1D!'
if has_3x1D:
assert 2 <= LUT[0].size <= 65536, (
'Shaper size must be in domain [2, 65536]!')
if has_3D:
assert 2 <= LUT[1].size <= 256, 'Cube size must be in domain [2, 256]!'
def _format_array(array):
"""
Formats given array as a *Resolve* *.cube* data row.
"""
return '{1:0.{0}f} {2:0.{0}f} {3:0.{0}f}'.format(decimals, *array)
def _format_tuple(array):
"""
Formats given array as 2 space separated values to *decimals*
precision.
"""
return '{1:0.{0}f} {2:0.{0}f}'.format(decimals, *array)
with open(path, 'w') as cube_file:
cube_file.write('TITLE "{0}"\n'.format(name))
if LUT[0].comments:
for comment in LUT[0].comments:
cube_file.write('# {0}\n'.format(comment))
if LUT[1].comments:
for comment in LUT[1].comments:
cube_file.write('# {0}\n'.format(comment))
default_domain = np.array([[0, 0, 0], [1, 1, 1]])
if has_3x1D:
cube_file.write('{0} {1}\n'.format('LUT_1D_SIZE',
LUT[0].table.shape[0]))
if not np.array_equal(LUT[0].domain, default_domain):
cube_file.write('LUT_1D_INPUT_RANGE {0}\n'.format(
_format_tuple([LUT[0].domain[0][0], LUT[0].domain[1][0]])))
if has_3D:
cube_file.write('{0} {1}\n'.format('LUT_3D_SIZE',
LUT[1].table.shape[0]))
if not np.array_equal(LUT[1].domain, default_domain):
cube_file.write('LUT_3D_INPUT_RANGE {0}\n'.format(
_format_tuple([LUT[1].domain[0][0], LUT[1].domain[1][0]])))
if has_3x1D:
table = LUT[0].table
for row in table:
cube_file.write('{0}\n'.format(_format_array(row)))
cube_file.write('\n')
if has_3D:
table = LUT[1].table.reshape([-1, 3], order='F')
for row in table:
cube_file.write('{0}\n'.format(_format_array(row)))
return True
def read_LUT_Cinespace(path):
"""
Reads given *Cinespace* *.csp* *LUT* file.
Parameters
----------
path : unicode
*LUT* path.
Returns
-------
LUT2D or LUT3D or LUTSequence
:class:`LUT2D` or :class:`LUT3D` or :class:`LUTSequence` class
instance.
References
----------
:cite:`RisingSunResearch`
Examples
--------
Reading a 2D *Cinespace* *.csp* *LUT*:
>>> import os
>>> path = os.path.join(
... os.path.dirname(__file__), 'tests', 'resources', 'cinespace',
... 'ACES_Proxy_10_to_ACES.csp')
>>> print(read_LUT_Cinespace(path))
LUT2D - ACES Proxy 10 to ACES
-----------------------------
<BLANKLINE>
Dimensions : 2
Domain : [[ 0. 0. 0.]
[ 1. 1. 1.]]
Size : (32, 3)
Reading a 3D *Cinespace* *.csp* *LUT*:
>>> path = os.path.join(
... os.path.dirname(__file__), 'tests', 'resources', 'cinespace',
... 'ColourCorrect.csp')
>>> print(read_LUT_Cinespace(path))
LUT3D - Generated by Foundry::LUT
---------------------------------
<BLANKLINE>
Dimensions : 3
Domain : [[ 0. 0. 0.]
[ 1. 1. 1.]]
Size : (4, 4, 4, 3)
"""
unity_range = np.array([[0., 0., 0.], [1., 1., 1.]])
def _parse_metadata_section(lines):
"""
Parses the metadata at given lines.
"""
if len(metadata) > 0:
title = metadata[0]
comments = metadata[1:]
else:
title = ''
comments = []
return title, comments
def _parse_domain_section(lines):
"""
Parses the domain at given lines.
"""
pre_LUT_size = max([int(lines[i]) for i in [0, 3, 6]])
pre_LUT = [parse_array(lines[i]) for i in [1, 2, 4, 5, 7, 8]]
pre_LUT_padded = []
for row in pre_LUT:
if len(row) != pre_LUT_size:
pre_LUT_padded.append(
np.pad(
row, (0, pre_LUT_size - row.shape[0]),
mode='constant',
constant_values=np.nan))
else:
pre_LUT_padded.append(row)
pre_LUT = np.asarray(pre_LUT_padded)
return pre_LUT
def _parse_table_section(lines):
"""
Parses the table at given lines.
"""
size = parse_array(lines[0]).astype(int)
table = np.array([parse_array(line) for line in lines[1:]])
return size, table
with open(path) as csp_file:
lines = csp_file.readlines()
assert len(lines) > 0, 'LUT file empty!'
lines = [line.strip() for line in lines if line.strip()]
header = lines[0]
assert header == 'CSPLUTV100', 'Invalid header!'
kind = lines[1]
assert kind in ('1D', '3D'), 'Invalid kind!'
is_3D = kind == '3D'
seek = 2
metadata = []
is_metadata = False
for i, line in enumerate(lines[2:]):
line = line.strip()
if line == 'BEGIN METADATA':
is_metadata = True
continue
elif line == 'END METADATA':
seek += i
break
if is_metadata:
metadata.append(line)
title, comments = _parse_metadata_section(metadata)
seek += 1
pre_LUT = _parse_domain_section(lines[seek:seek + 9])
seek += 9
size, table = _parse_table_section(lines[seek:])
assert np.product(size) == len(table), 'Invalid table size!'
if (is_3D and pre_LUT.shape == (6, 2) and np.array_equal(
pre_LUT.reshape(3, 4).transpose()[2:4], unity_range)):
table = table.reshape((size[0], size[1], size[2], 3), order='F')
LUT = LUT3D(
domain=pre_LUT.reshape(3, 4).transpose()[0:2],
name=title,
comments=comments,
table=table)
return LUT
if (not is_3D and pre_LUT.shape == (6, 2) and np.array_equal(
pre_LUT.reshape(3, 4).transpose()[2:4], unity_range)):
LUT = LUT2D(
domain=pre_LUT.reshape(3, 4).transpose()[0:2],
name=title,
comments=comments,
table=table)
return LUT
if is_3D:
pre_domain = tstack((pre_LUT[0], pre_LUT[2], pre_LUT[4]))
pre_table = tstack((pre_LUT[1], pre_LUT[3], pre_LUT[5]))
shaper_name = '{0} - Shaper'.format(title)
cube_name = '{0} - Cube'.format(title)
table = table.reshape((size[0], size[1], size[2], 3), order='F')
LUT_A = LUT2D(pre_table, shaper_name, pre_domain)
LUT_B = LUT3D(table, cube_name, comments=comments)
return LUTSequence(LUT_A, LUT_B)
if not is_3D:
pre_domain = tstack((pre_LUT[0], pre_LUT[2], pre_LUT[4]))
pre_table = tstack((pre_LUT[1], pre_LUT[3], pre_LUT[5]))
if np.array_equal(table, unity_range):
return LUT2D(pre_table, title, pre_domain, comments=comments)
elif table.shape == (2, 3):
table_max = table[1]
table_min = table[0]
pre_table *= (table_max - table_min)
pre_table += table_min
return LUT2D(pre_table, title, pre_domain, comments=comments)
else:
pre_name = '{0} - preLUT'.format(title)
table_name = '{0} - table'.format(title)
LUT_A = LUT2D(pre_table, pre_name, pre_domain)
LUT_B = LUT2D(table, table_name, comments=comments)
return LUTSequence(LUT_A, LUT_B)
def write_LUT_Cinespace(LUT, path, decimals=7):
"""
Writes given *LUT* to given *Cinespace* *.csp* *LUT* file.
Parameters
----------
LUT : LUT1D or LUT2D or LUT3D or LUTSequence
:class:`LUT1D`, :class:`LUT2D` or :class:`LUT3D` or
:class:`LUTSequence` class instance to write at given path.
path : unicode
*LUT* path.
decimals : int, optional
Formatting decimals.
Returns
-------
bool
Definition success.
References
----------
:cite:`RisingSunResearch`
Examples
--------
Writing a 2D *Cinespace* *.csp* *LUT*:
>>> from colour.algebra import spow
>>> domain = np.array([[-0.1, -0.2, -0.4], [1.5, 3.0, 6.0]])
>>> LUT = LUT2D(
... spow(LUT2D.linear_table(16, domain), 1 / 2.2),
... 'My LUT',
... domain,
... comments=['A first comment.', 'A second comment.'])
>>> write_LUT_Cinespace(LUT, 'My_LUT.cube') # doctest: +SKIP
Writing a 3D *Cinespace* *.csp* *LUT*:
>>> domain = np.array([[-0.1, -0.2, -0.4], [1.5, 3.0, 6.0]])
>>> LUT = LUT3D(
... spow(LUT3D.linear_table(16, domain), 1 / 2.2),
... 'My LUT',
... domain,
... comments=['A first comment.', 'A second comment.'])
>>> write_LUT_Cinespace(LUT, 'My_LUT.cube') # doctest: +SKIP
"""
has_3D, has_2D, non_uniform = False, False, False
if isinstance(LUT, LUTSequence):
assert (len(LUT) == 2 and
(isinstance(LUT[0], LUT1D) or isinstance(LUT[0], LUT2D)) and
isinstance(LUT[1],
LUT3D)), 'LUTSequence must be 1D+3D or 2D+3D!'
has_2D = True
has_3D = True
name = LUT[1].name
if isinstance(LUT[0], LUT1D):
LUT[0] = LUT[0].as_LUT(LUT2D)
elif isinstance(LUT, LUT1D):
if LUT.is_domain_explicit():
non_uniform = True
name = LUT.name
LUT = LUTSequence(LUT.as_LUT(LUT2D), LUT3D())
has_2D = True
elif isinstance(LUT, LUT2D):
if LUT.is_domain_explicit():
non_uniform = True
name = LUT.name
LUT = LUTSequence(LUT, LUT3D())
has_2D = True
elif isinstance(LUT, LUT3D):
name = LUT.name
LUT = LUTSequence(LUT2D(), LUT)
has_3D = True
else:
assert False, 'LUT must be 1D, 2D, 3D, 1D+3D or 2D+3D!'
if has_2D:
assert 2 <= LUT[0].size <= 65536, (
'Shaper size must be in domain [2, 65536]!')
if has_3D:
assert 2 <= LUT[1].size <= 256, 'Cube size must be in domain [2, 256]!'
def _ragged_size(table):
"""
Return the ragged size of given table.
"""
r, g, b = tsplit(table)
r_len = r.shape[-1] - np.sum(np.isnan(r))
g_len = g.shape[-1] - np.sum(np.isnan(g))
b_len = b.shape[-1] - np.sum(np.isnan(b))
return [r_len, g_len, b_len]
def _format_array(array):
"""
Formats given array as a *Cinespace* *.cube* data row.
"""
return '{1:0.{0}f} {2:0.{0}f} {3:0.{0}f}'.format(decimals, *array)
def _format_tuple(array):
"""
Formats given array as 2 space separated values to *decimals*
precision.
"""
return '{1:0.{0}f} {2:0.{0}f}'.format(decimals, *array)
with open(path, 'w') as csp_file:
csp_file.write('CSPLUTV100\n')
if has_3D:
csp_file.write('3D\n\n')
else:
csp_file.write('1D\n\n')
csp_file.write('BEGIN METADATA\n')
csp_file.write('{0}\n'.format(name))
if LUT[0].comments:
for comment in LUT[0].comments:
csp_file.write('{0}\n'.format(comment))
if LUT[1].comments:
for comment in LUT[1].comments:
csp_file.write('{0}\n'.format(comment))
csp_file.write('END METADATA\n\n')
if has_3D or non_uniform:
if has_2D:
for i in range(3):
if LUT[0].is_domain_explicit():
size = _ragged_size(LUT[0].domain)[i]
table_min = np.nanmin(LUT[0].table)
table_max = np.nanmax(LUT[0].table)
else:
size = LUT[0].size
csp_file.write('{0}\n'.format(size))
for j in range(size):
if LUT[0].is_domain_explicit():
entry = LUT[0].domain[j][i]
else:
entry = (
LUT[0].domain[0][i] + j *
(LUT[0].domain[1][i] - LUT[0].domain[0][i]) /
(LUT[0].size - 1))
csp_file.write('{0:.{1}f} '.format(entry, decimals))
csp_file.write('\n')
for j in range(size):
entry = LUT[0].table[j][i]
if non_uniform:
entry -= table_min
entry /= (table_max - table_min)
csp_file.write('{0:.{1}f} '.format(entry, decimals))
csp_file.write('\n')
else:
for i in range(3):
csp_file.write('2\n')
csp_file.write('{0}\n'.format(
_format_tuple(
[LUT[1].domain[0][i], LUT[1].domain[1][i]])))
csp_file.write('{0:.{2}f} {1:.{2}f}\n'.format(
0, 1, decimals))
if non_uniform:
csp_file.write('\n{0}\n'.format(2))
row = [table_min, table_min, table_min]
csp_file.write('{0}\n'.format(_format_array(row)))
row = [table_max, table_max, table_max]
csp_file.write('{0}\n'.format(_format_array(row)))
else:
csp_file.write('\n{0} {1} {2}\n'.format(
LUT[1].table.shape[0], LUT[1].table.shape[1],
LUT[1].table.shape[2]))
table = LUT[1].table.reshape((-1, 3), order='F')
for row in table:
csp_file.write('{0}\n'.format(_format_array(row)))
else:
for i in range(3):
csp_file.write('2\n')
csp_file.write('{0}\n'.format(
_format_tuple([LUT[0].domain[0][i], LUT[0].domain[1][i]])))
csp_file.write('0.0 1.0\n')
csp_file.write('\n{0}\n'.format(LUT[0].size))
table = LUT[0].table
for row in table:
csp_file.write('{0}\n'.format(_format_array(row)))
return True
def test__repr__(self):
"""Test :class:`colour.io.luts.sequence.LUTSequence.__repr__` method."""
LUT_sequence = self._LUT_sequence.copy()
LUT_sequence[1].table = LUT3D.linear_table(5)
self.assertEqual(
repr(LUT_sequence),
textwrap.dedent("""
LUTSequence(
LUT1D([ 0.125 , 0.19166667, 0.25833333, 0.325 , \
0.39166667,
0.45833333, 0.525 , 0.59166667, 0.65833333, \
0.725 ,
0.79166667, 0.85833333, 0.925 , 0.99166667, \
1.05833333,
1.125 ],
name='Nemo 1D',
domain=[ 0., 1.]),
LUT3D([[[[ 0. , 0. , 0. ],
[ 0. , 0. , 0.25],
[ 0. , 0. , 0.5 ],
[ 0. , 0. , 0.75],
[ 0. , 0. , 1. ]],
[[ 0. , 0.25, 0. ],
[ 0. , 0.25, 0.25],
[ 0. , 0.25, 0.5 ],
[ 0. , 0.25, 0.75],
[ 0. , 0.25, 1. ]],
[[ 0. , 0.5 , 0. ],
[ 0. , 0.5 , 0.25],
[ 0. , 0.5 , 0.5 ],
[ 0. , 0.5 , 0.75],
[ 0. , 0.5 , 1. ]],
[[ 0. , 0.75, 0. ],
[ 0. , 0.75, 0.25],
[ 0. , 0.75, 0.5 ],
[ 0. , 0.75, 0.75],
[ 0. , 0.75, 1. ]],
[[ 0. , 1. , 0. ],
[ 0. , 1. , 0.25],
[ 0. , 1. , 0.5 ],
[ 0. , 1. , 0.75],
[ 0. , 1. , 1. ]]],
[[[ 0.25, 0. , 0. ],
[ 0.25, 0. , 0.25],
[ 0.25, 0. , 0.5 ],
[ 0.25, 0. , 0.75],
[ 0.25, 0. , 1. ]],
[[ 0.25, 0.25, 0. ],
[ 0.25, 0.25, 0.25],
[ 0.25, 0.25, 0.5 ],
[ 0.25, 0.25, 0.75],
[ 0.25, 0.25, 1. ]],
[[ 0.25, 0.5 , 0. ],
[ 0.25, 0.5 , 0.25],
[ 0.25, 0.5 , 0.5 ],
[ 0.25, 0.5 , 0.75],
[ 0.25, 0.5 , 1. ]],
[[ 0.25, 0.75, 0. ],
[ 0.25, 0.75, 0.25],
[ 0.25, 0.75, 0.5 ],
[ 0.25, 0.75, 0.75],
[ 0.25, 0.75, 1. ]],
[[ 0.25, 1. , 0. ],
[ 0.25, 1. , 0.25],
[ 0.25, 1. , 0.5 ],
[ 0.25, 1. , 0.75],
[ 0.25, 1. , 1. ]]],
[[[ 0.5 , 0. , 0. ],
[ 0.5 , 0. , 0.25],
[ 0.5 , 0. , 0.5 ],
[ 0.5 , 0. , 0.75],
[ 0.5 , 0. , 1. ]],
[[ 0.5 , 0.25, 0. ],
[ 0.5 , 0.25, 0.25],
[ 0.5 , 0.25, 0.5 ],
[ 0.5 , 0.25, 0.75],
[ 0.5 , 0.25, 1. ]],
[[ 0.5 , 0.5 , 0. ],
[ 0.5 , 0.5 , 0.25],
[ 0.5 , 0.5 , 0.5 ],
[ 0.5 , 0.5 , 0.75],
[ 0.5 , 0.5 , 1. ]],
[[ 0.5 , 0.75, 0. ],
[ 0.5 , 0.75, 0.25],
[ 0.5 , 0.75, 0.5 ],
[ 0.5 , 0.75, 0.75],
[ 0.5 , 0.75, 1. ]],
[[ 0.5 , 1. , 0. ],
[ 0.5 , 1. , 0.25],
[ 0.5 , 1. , 0.5 ],
[ 0.5 , 1. , 0.75],
[ 0.5 , 1. , 1. ]]],
[[[ 0.75, 0. , 0. ],
[ 0.75, 0. , 0.25],
[ 0.75, 0. , 0.5 ],
[ 0.75, 0. , 0.75],
[ 0.75, 0. , 1. ]],
[[ 0.75, 0.25, 0. ],
[ 0.75, 0.25, 0.25],
[ 0.75, 0.25, 0.5 ],
[ 0.75, 0.25, 0.75],
[ 0.75, 0.25, 1. ]],
[[ 0.75, 0.5 , 0. ],
[ 0.75, 0.5 , 0.25],
[ 0.75, 0.5 , 0.5 ],
[ 0.75, 0.5 , 0.75],
[ 0.75, 0.5 , 1. ]],
[[ 0.75, 0.75, 0. ],
[ 0.75, 0.75, 0.25],
[ 0.75, 0.75, 0.5 ],
[ 0.75, 0.75, 0.75],
[ 0.75, 0.75, 1. ]],
[[ 0.75, 1. , 0. ],
[ 0.75, 1. , 0.25],
[ 0.75, 1. , 0.5 ],
[ 0.75, 1. , 0.75],
[ 0.75, 1. , 1. ]]],
[[[ 1. , 0. , 0. ],
[ 1. , 0. , 0.25],
[ 1. , 0. , 0.5 ],
[ 1. , 0. , 0.75],
[ 1. , 0. , 1. ]],
[[ 1. , 0.25, 0. ],
[ 1. , 0.25, 0.25],
[ 1. , 0.25, 0.5 ],
[ 1. , 0.25, 0.75],
[ 1. , 0.25, 1. ]],
[[ 1. , 0.5 , 0. ],
[ 1. , 0.5 , 0.25],
[ 1. , 0.5 , 0.5 ],
[ 1. , 0.5 , 0.75],
[ 1. , 0.5 , 1. ]],
[[ 1. , 0.75, 0. ],
[ 1. , 0.75, 0.25],
[ 1. , 0.75, 0.5 ],
[ 1. , 0.75, 0.75],
[ 1. , 0.75, 1. ]],
[[ 1. , 1. , 0. ],
[ 1. , 1. , 0.25],
[ 1. , 1. , 0.5 ],
[ 1. , 1. , 0.75],
[ 1. , 1. , 1. ]]]],
name='Nemo 3D',
domain=[[ 0., 0., 0.],
[ 1., 1., 1.]]),
LUT3x1D([[ 0. , 0. , 0. ],
[ 0.05, 0.05, 0.05],
[ 0.1 , 0.1 , 0.1 ],
[ 0.15, 0.15, 0.15],
[ 0.2 , 0.2 , 0.2 ],
[ 0.25, 0.25, 0.25],
[ 0.3 , 0.3 , 0.3 ],
[ 0.35, 0.35, 0.35],
[ 0.4 , 0.4 , 0.4 ],
[ 0.45, 0.45, 0.45],
[ 0.5 , 0.5 , 0.5 ],
[ 0.55, 0.55, 0.55],
[ 0.6 , 0.6 , 0.6 ],
[ 0.65, 0.65, 0.65],
[ 0.7 , 0.7 , 0.7 ],
[ 0.75, 0.75, 0.75]],
name='Nemo 3x1D',
domain=[[ 0., 0., 0.],
[ 1., 1., 1.]])
)"""[1:]),
)
def read_LUT_SonySPI3D(path):
"""
Reads given *Sony* *.spi3d* *LUT* file.
Parameters
----------
path : unicode
*LUT* path.
Returns
-------
LUT3D or LUT3x1D
:class:`LUT3D` or :class:`LUT3x1D` class instance.
Examples
--------
Reading a 3D *Sony* *.spi3d* *LUT*:
>>> import os
>>> path = os.path.join(
... os.path.dirname(__file__), 'tests', 'resources', 'sony_spi3d',
... 'ColourCorrect.spi3d')
>>> print(read_LUT_SonySPI3D(path))
LUT3D - ColourCorrect
---------------------
<BLANKLINE>
Dimensions : 3
Domain : [[ 0. 0. 0.]
[ 1. 1. 1.]]
Size : (4, 4, 4, 3)
Comment 01 : Adapted from a LUT generated by Foundry::LUT.
"""
title = path_to_title(path)
domain_min, domain_max = np.array([0, 0, 0]), np.array([1, 1, 1])
size = 2
indexes = []
table = []
comments = []
with open(path) as spi3d_file:
lines = spi3d_file.readlines()
for line in lines:
line = line.strip()
if len(line) == 0:
continue
if line.startswith('#'):
comments.append(line[1:].strip())
continue
tokens = line.split()
if len(tokens) == 3:
assert len(set(tokens)) == 1, (
'Non-uniform "LUT" shape is unsupported!')
size = DEFAULT_INT_DTYPE(tokens[0])
if len(tokens) == 6:
indexes.append(parse_array(tokens[:3]))
table.append(parse_array(tokens[3:]))
assert np.array_equal(
indexes,
DEFAULT_INT_DTYPE(LUT3D.linear_table(size) * (size - 1)).reshape(
(-1, 3))), 'Indexes do not match expected "LUT3D" indexes!'
table = as_float_array(table).reshape([size, size, size, 3])
return LUT3D(
table, title, np.vstack([domain_min, domain_max]), comments=comments)
def read_LUT_Cinespace(path: str) -> Union[LUT3x1D, LUT3D, LUTSequence]:
"""
Read given *Cinespace* *.csp* *LUT* file.
Parameters
----------
path
*LUT* path.
Returns
-------
:class:`colour.LUT3x1D` or :class:`colour.LUT3D` or \
:class:`colour.LUTSequence`
:class:`LUT3x1D` or :class:`LUT3D` or :class:`LUTSequence` class
instance.
References
----------
:cite:`RisingSunResearch`
Examples
--------
Reading a 3x1D *Cinespace* *.csp* *LUT*:
>>> import os
>>> path = os.path.join(
... os.path.dirname(__file__), 'tests', 'resources', 'cinespace',
... 'ACES_Proxy_10_to_ACES.csp')
>>> print(read_LUT_Cinespace(path))
LUT3x1D - ACES Proxy 10 to ACES
-------------------------------
<BLANKLINE>
Dimensions : 2
Domain : [[ 0. 0. 0.]
[ 1. 1. 1.]]
Size : (32, 3)
Reading a 3D *Cinespace* *.csp* *LUT*:
>>> path = os.path.join(
... os.path.dirname(__file__), 'tests', 'resources', 'cinespace',
... 'Colour_Correct.csp')
>>> print(read_LUT_Cinespace(path))
LUT3D - Generated by Foundry::LUT
---------------------------------
<BLANKLINE>
Dimensions : 3
Domain : [[ 0. 0. 0.]
[ 1. 1. 1.]]
Size : (4, 4, 4, 3)
"""
unity_range = np.array([[0.0, 0.0, 0.0], [1.0, 1.0, 1.0]])
def _parse_metadata_section(metadata: List) -> Tuple:
"""Parse the metadata at given lines."""
return (metadata[0], metadata[1:]) if len(metadata) > 0 else ("", [])
def _parse_domain_section(lines: List[str]) -> NDArray:
"""Parse the domain at given lines."""
pre_LUT_size = max(int(lines[i]) for i in [0, 3, 6])
pre_LUT = [
as_float_array(lines[i].split()) for i in [1, 2, 4, 5, 7, 8]
]
pre_LUT_padded = []
for row in pre_LUT:
if len(row) != pre_LUT_size:
pre_LUT_padded.append(
np.pad(
row,
(0, pre_LUT_size - row.shape[0]),
mode="constant",
constant_values=np.nan,
))
else:
pre_LUT_padded.append(row)
return np.asarray(pre_LUT_padded)
def _parse_table_section(lines):
"""Parse the table at given lines."""
size = as_int_array(lines[0].split())
table = as_float_array([line.split() for line in lines[1:]])
return size, table
with open(path) as csp_file:
lines = csp_file.readlines()
attest(len(lines) > 0, '"LUT" is empty!')
lines = [line.strip() for line in lines if line.strip()]
header = lines[0]
attest(header == "CSPLUTV100", '"LUT" header is invalid!')
kind = lines[1]
attest(kind in ("1D", "3D"), '"LUT" type must be "1D" or "3D"!')
is_3D = kind == "3D"
seek = 2
metadata = []
is_metadata = False
for i, line in enumerate(lines[2:]):
line = line.strip()
if line == "BEGIN METADATA":
is_metadata = True
continue
elif line == "END METADATA":
seek += i
break
if is_metadata:
metadata.append(line)
title, comments = _parse_metadata_section(metadata)
seek += 1
pre_LUT = _parse_domain_section(lines[seek:seek + 9])
seek += 9
size, table = _parse_table_section(lines[seek:])
attest(np.product(size) == len(table), '"LUT" table size is invalid!')
LUT: Union[LUT3x1D, LUT3D, LUTSequence]
if (is_3D and pre_LUT.shape == (6, 2) and np.array_equal(
np.transpose(np.reshape(pre_LUT, (3, 4)))[2:4], unity_range)):
table = table.reshape([size[0], size[1], size[2], 3], order="F")
LUT = LUT3D(
domain=np.transpose(np.reshape(pre_LUT, (3, 4)))[0:2],
name=title,
comments=comments,
table=table,
)
elif (not is_3D and pre_LUT.shape == (6, 2) and np.array_equal(
np.transpose(np.reshape(pre_LUT, (3, 4)))[2:4], unity_range)):
LUT = LUT3x1D(
domain=pre_LUT.reshape(3, 4).transpose()[0:2],
name=title,
comments=comments,
table=table,
)
elif is_3D:
pre_domain = tstack((pre_LUT[0], pre_LUT[2], pre_LUT[4]))
pre_table = tstack((pre_LUT[1], pre_LUT[3], pre_LUT[5]))
shaper_name = f"{title} - Shaper"
cube_name = f"{title} - Cube"
table = table.reshape([size[0], size[1], size[2], 3], order="F")
LUT = LUTSequence(
LUT3x1D(pre_table, shaper_name, pre_domain),
LUT3D(table, cube_name, comments=comments),
)
elif not is_3D:
pre_domain = tstack((pre_LUT[0], pre_LUT[2], pre_LUT[4]))
pre_table = tstack((pre_LUT[1], pre_LUT[3], pre_LUT[5]))
if table.shape == (2, 3):
table_max = table[1]
table_min = table[0]
pre_table *= table_max - table_min
pre_table += table_min
LUT = LUT3x1D(pre_table, title, pre_domain, comments=comments)
else:
pre_name = f"{title} - PreLUT"
table_name = f"{title} - Table"
LUT = LUTSequence(
LUT3x1D(pre_table, pre_name, pre_domain),
LUT3x1D(table, table_name, comments=comments),
)
return LUT
def write_LUT_Cinespace(LUT: Union[LUT3x1D, LUT3D, LUTSequence],
path: str,
decimals: Integer = 7) -> Boolean:
"""
Write given *LUT* to given *Cinespace* *.csp* *LUT* file.
Parameters
----------
LUT
:class:`LUT1D`, :class:`LUT3x1D` or :class:`LUT3D` or
:class:`LUTSequence` class instance to write at given path.
path
*LUT* path.
decimals
Formatting decimals.
Returns
-------
:class:`bool`
Definition success.
References
----------
:cite:`RisingSunResearch`
Examples
--------
Writing a 3x1D *Cinespace* *.csp* *LUT*:
>>> from colour.algebra import spow
>>> domain = np.array([[-0.1, -0.2, -0.4], [1.5, 3.0, 6.0]])
>>> LUT = LUT3x1D(
... spow(LUT3x1D.linear_table(16, domain), 1 / 2.2),
... 'My LUT',
... domain,
... comments=['A first comment.', 'A second comment.'])
>>> write_LUT_Cinespace(LUT, 'My_LUT.cube') # doctest: +SKIP
Writing a 3D *Cinespace* *.csp* *LUT*:
>>> domain = np.array([[-0.1, -0.2, -0.4], [1.5, 3.0, 6.0]])
>>> LUT = LUT3D(
... spow(LUT3D.linear_table(16, domain), 1 / 2.2),
... 'My LUT',
... domain,
... comments=['A first comment.', 'A second comment.'])
>>> write_LUT_Cinespace(LUT, 'My_LUT.cube') # doctest: +SKIP
"""
has_3D, has_3x1D = False, False
if isinstance(LUT, LUTSequence):
attest(
len(LUT) == 2 and isinstance(LUT[0], (LUT1D, LUT3x1D))
and isinstance(LUT[1], LUT3D),
'"LUTSequence" must be "1D + 3D" or "3x1D + 3D"!',
)
LUT[0] = (LUT[0].as_LUT(LUT3x1D)
if isinstance(LUT[0], LUT1D) else LUT[0])
name = f"{LUT[0].name} - {LUT[1].name}"
has_3x1D = True
has_3D = True
elif isinstance(LUT, LUT1D):
name = LUT.name
has_3x1D = True
LUT = LUTSequence(LUT.as_LUT(LUT3x1D), LUT3D())
elif isinstance(LUT, LUT3x1D):
name = LUT.name
has_3x1D = True
LUT = LUTSequence(LUT, LUT3D())
elif isinstance(LUT, LUT3D):
name = LUT.name
has_3D = True
LUT = LUTSequence(LUT3x1D(), LUT)
else:
raise ValueError("LUT must be 1D, 3x1D, 3D, 1D + 3D or 3x1D + 3D!")
if has_3x1D:
attest(
2 <= LUT[0].size <= 65536,
"Shaper size must be in domain [2, 65536]!",
)
if has_3D:
attest(2 <= LUT[1].size <= 256,
"Cube size must be in domain [2, 256]!")
def _ragged_size(table: ArrayLike) -> List:
"""Return the ragged size of given table."""
R, G, B = tsplit(table)
R_len = R.shape[-1] - np.sum(np.isnan(R))
G_len = G.shape[-1] - np.sum(np.isnan(G))
B_len = B.shape[-1] - np.sum(np.isnan(B))
return [R_len, G_len, B_len]
def _format_array(array: Union[List, Tuple]) -> str:
"""Format given array as a *Cinespace* *.cube* data row."""
return "{1:0.{0}f} {2:0.{0}f} {3:0.{0}f}".format(decimals, *array)
def _format_tuple(array: Union[List, Tuple]) -> str:
"""
Format given array as 2 space separated values to *decimals*
precision.
"""
return "{1:0.{0}f} {2:0.{0}f}".format(decimals, *array)
with open(path, "w") as csp_file:
csp_file.write("CSPLUTV100\n")
if has_3D:
csp_file.write("3D\n\n")
else:
csp_file.write("1D\n\n")
csp_file.write("BEGIN METADATA\n")
csp_file.write(f"{name}\n")
if LUT[0].comments:
for comment in LUT[0].comments:
csp_file.write(f"{comment}\n")
if LUT[1].comments:
for comment in LUT[1].comments:
csp_file.write(f"{comment}\n")
csp_file.write("END METADATA\n\n")
if has_3D:
if has_3x1D:
for i in range(3):
size = (_ragged_size(LUT[0].domain)[i]
if LUT[0].is_domain_explicit() else LUT[0].size)
csp_file.write(f"{size}\n")
for j in range(size):
entry = (LUT[0].domain[j][i]
if LUT[0].is_domain_explicit() else
(LUT[0].domain[0][i] + j *
(LUT[0].domain[1][i] - LUT[0].domain[0][i]) /
(LUT[0].size - 1)))
csp_file.write("{0:.{1}f} ".format(entry, decimals))
csp_file.write("\n")
for j in range(size):
entry = LUT[0].table[j][i]
csp_file.write("{0:.{1}f} ".format(entry, decimals))
csp_file.write("\n")
else:
for i in range(3):
csp_file.write("2\n")
domain = _format_tuple(
[LUT[1].domain[0][i], LUT[1].domain[1][i]])
csp_file.write(f"{domain}\n")
csp_file.write("{0:.{2}f} {1:.{2}f}\n".format(
0, 1, decimals))
csp_file.write(f"\n{LUT[1].table.shape[0]} "
f"{LUT[1].table.shape[1]} "
f"{LUT[1].table.shape[2]}\n")
table = LUT[1].table.reshape([-1, 3], order="F")
for row in table:
csp_file.write(f"{_format_array(row)}\n")
else:
for i in range(3):
csp_file.write("2\n")
domain = _format_tuple(
[LUT[0].domain[0][i], LUT[0].domain[1][i]])
csp_file.write(f"{domain}\n")
csp_file.write("0.0 1.0\n")
csp_file.write(f"\n{LUT[0].size}\n")
table = LUT[0].table
for row in table:
csp_file.write(f"{_format_array(row)}\n")
return True