colour.recovery.Dataset_Otsu2018¶
- class colour.recovery.Dataset_Otsu2018(shape=None, basis_functions=None, means=None, selector_array=None)[source]¶
Stores all the information needed for the Otsu et al. (2018) spectral upsampling method.
Datasets can be either generated and converted as a
colour.recovery.Dataset_Otsu2018
class instance using thecolour.recovery.NodeTree_Otsu2018.to_dataset()
method or alternatively, loaded from disk with thecolour.recovery.Dataset_Otsu2018.read()
method.- Parameters
shape (SpectralShape) – Shape of the spectral data.
basis_functions (array_like, (n, 3, m)) – Three basis functions for every cluster.
means (array_like, (n, m)) – Mean for every cluster.
selector_array (array_like, (k, 4)) – Array describing how to select the appropriate cluster. See
colour.recovery.Dataset_Otsu2018.select()
method for details.
Attributes
shape
basis_functions
means
selector_array
Methods
select()
cluster()
read()
write()
References
[]
Examples
>>> import os >>> import colour >>> from colour.characterisation import SDS_COLOURCHECKERS >>> reflectances = [ ... sd.copy().align(SPECTRAL_SHAPE_OTSU2018).values ... for sd in SDS_COLOURCHECKERS['ColorChecker N Ohta'].values() ... ] >>> node_tree = NodeTree_Otsu2018(reflectances) >>> node_tree.optimise(iterations=2, print_callable=lambda x: x) >>> dataset = node_tree.to_dataset() >>> path = os.path.join(colour.__path__[0], 'recovery', 'tests', ... 'resources', 'ColorChecker_Otsu2018.npz') >>> dataset.write(path) >>> dataset = Dataset_Otsu2018() >>> dataset.read(path)
Methods
__init__
([shape, basis_functions, means, ...])cluster
(xy)Returns the basis functions and dataset mean for the given CIE xy coordinates.
read
(path)Reads and loads a dataset from an .npz file.
select
(xy)Returns the cluster index appropriate for the given CIE xy coordinates.
write
(path)Writes the dataset to an .npz file at given path.
Attributes
basis_functions
Getter property for the basis functions of the Otsu et al. (2018) dataset.
means
Getter property for means of the Otsu et al. (2018) dataset.
selector_array
Getter property for the selector array of the Otsu et al. (2018) dataset.
shape
Getter property for the shape used by the Otsu et al. (2018) dataset.