def get_output_specification_from_data(self, data):
"""
Returns the *CIECAM02* colour appearance model output specification
from given data.
Parameters
----------
data : list
Fixture data.
Returns
-------
CIECAM02_Specification
*CIECAM02* colour appearance model specification.
"""
XYZ_w = np.array([data['X_w'], data['Y_w'], data['Z_w']])
specification = CIECAM02_to_XYZ(data['J'], data['C'], data['h'],
XYZ_w,
data['L_A'],
data['Y_b'],
CIECAM02_InductionFactors(data['F'],
data['c'],
data['N_c']))
return specification
def _XYZ_from_data(self, data, correlates):
"""
Returns the *CIE XYZ* tristimulus values from given *CIECAM02* colour
appearance model input data.
Parameters
----------
data : list
Fixture data.
correlates : array_like
Correlates used to build the input *CIECAM02* colour appearance
model specification.
Returns
-------
array_like
*CIE XYZ* tristimulus values
"""
XYZ_w = tstack([data['X_w'], data['Y_w'], data['Z_w']])
i, j, k = correlates
CIECAM02_specification = as_namedtuple(
{
i: data[i],
j: data[j],
k: data[k]
}, CIECAM02_Specification)
XYZ = CIECAM02_to_XYZ(
CIECAM02_specification, XYZ_w, data['L_A'], data['Y_b'],
CIECAM02_InductionFactors(data['F'], data['c'], data['N_c']))
return XYZ
def output_specification_from_data(self, data):
"""
Returns the CIECAM02 colour appearance model output specification
from given data.
Parameters
----------
data : list
Fixture data.
Returns
-------
CIECAM02_Specification
CIECAM02 colour appearance model specification.
"""
XYZ = tstack((data['X'], data['Y'], data['Z']))
XYZ_w = tstack((data['X_w'], data['Y_w'], data['Z_w']))
specification = XYZ_to_CIECAM02(
XYZ, XYZ_w, data['L_A'], data['Y_b'],
CIECAM02_InductionFactors(data['F'], data['c'], data['N_c']))
return specification