def __init__(
self,
sds,
shape,
cmfs=STANDARD_OBSERVER_CMFS['CIE 1931 2 Degree Standard Observer'],
illuminant=sd_ones()):
"""
Parameters
----------
sds : ndarray (n,m)
Reflectances of the ``n`` reference colours to be used for
optimisation.
shape : SpectralShape
Spectral shape of ``sds``.
cmfs : XYZ_ColourMatchingFunctions, optional
Standard observer colour matching functions.
illuminant : SpectralDistribution, optional
Illuminant spectral distribution.
"""
self.shape = shape
self.wl = shape.range()
self.dw = self.wl[1] - self.wl[0]
self.cmfs = cmfs.copy().align(shape)
self.illuminant = illuminant.copy().align(shape)
self.xy_w = XYZ_to_xy(sd_to_XYZ(illuminant, cmfs=cmfs))
# The normalising constant used in sd_to_XYZ.
self.k = 1 / (np.sum(self.cmfs.values[:, 1] * self.illuminant.values) *
self.dw)
# Python 3: super().__init__(...)
super(Otsu2018Tree, self).__init__(self, Colours(self, sds))
message_box('Sample spectral distribution interpolation.')
sd_clone.interpolate(colour.SpectralShape(360, 780, 1))
print(sd_clone[666])
print('\n')
message_box('Sample spectral distribution extrapolation.')
sd_clone.extrapolate(colour.SpectralShape(340, 830))
print(sd_clone[340], sd_clone[360])
print('\n')
message_box('Sample spectral distribution align.')
sd_clone.align(colour.SpectralShape(400, 700, 5))
print(sd_clone[400], sd_clone[700])
print('\n')
message_box('Constant value filled spectral distribution.')
print(colour.sd_constant(3.1415)[400])
print('\n')
message_box('Zeros filled spectral distribution.')
print(colour.sd_zeros()[400])
print('\n')
message_box('Ones filled spectral distribution.')
print(colour.sd_ones()[400])
message_box('Sample spectral distribution interpolation.')
clone_sd.interpolate(colour.SpectralShape(360, 780, 1))
print(clone_sd[666])
print('\n')
message_box('Sample spectral distribution extrapolation.')
clone_sd.extrapolate(colour.SpectralShape(340, 830))
print(clone_sd[340], clone_sd[360])
print('\n')
message_box('Sample spectral distribution align.')
clone_sd.align(colour.SpectralShape(400, 700, 5))
print(clone_sd[400], clone_sd[700])
print('\n')
message_box('Constant value filled spectral distribution.')
print(colour.sd_constant(3.1415)[400])
print('\n')
message_box('Zeros filled spectral distribution.')
print(colour.sd_zeros()[400])
print('\n')
message_box('Ones filled spectral distribution.')
print(colour.sd_ones()[400])