Reflectance Recovery

CIE XYZ Colourspace to Spectral

colour

XYZ_to_sd(XYZ[, method])	Recover the spectral distribution of given CIE XYZ tristimulus values using given method.
XYZ_TO_SD_METHODS	Supported spectral distribution recovery methods.

Jakob and Hanika (2019)

colour.recovery

XYZ_to_sd_Jakob2019(XYZ[, cmfs, illuminant, ...])	Recover the spectral distribution of given RGB colourspace array using Jakob and Hanika (2019) method.
LUT3D_Jakob2019()	Clas for working with pre-computed lookup tables for the Jakob and Hanika (2019) spectral upsampling method.

Ancillary Objects

colour.recovery

sd_Jakob2019(coefficients[, shape])	Return a spectral distribution following the spectral model given by Jakob and Hanika (2019).
find_coefficients_Jakob2019(XYZ[, cmfs, ...])	Compute the coefficients for Jakob and Hanika (2019) reflectance spectral model.

Mallett and Yuksel (2019)

colour.recovery

RGB_to_sd_Mallett2019(RGB[, basis_functions])

Recover the spectral distribution of given RGB colourspace array using Mallett and Yuksel (2019) method.

Ancillary Objects

colour.recovery

MSDS_BASIS_FUNCTIONS_sRGB_MALLETT2019	the base object for multi spectral computations.
SPECTRAL_SHAPE_sRGB_MALLETT2019	Shape for Mallett and Yuksel (2019) sRGB colourspace basis functions: (380, 780, 5).
spectral_primary_decomposition_Mallett2019(...)	Perform the spectral primary decomposition as described in Mallett and Yuksel (2019) for given RGB colourspace.

Meng, Simon and Hanika (2015)

colour.recovery

XYZ_to_sd_Meng2015(XYZ[, cmfs, illuminant, ...])

Recover the spectral distribution of given CIE XYZ tristimulus values using Meng et al. (2015) method.

Otsu, Yamamoto and Hachisuka (2018)

colour.recovery

XYZ_to_sd_Otsu2018(XYZ[, cmfs, illuminant, ...])

Recover the spectral distribution of given CIE XYZ tristimulus values using Otsu et al. (2018) method.

Ancillary Objects

colour.recovery

Dataset_Otsu2018([shape, basis_functions, ...])	Store all the information needed for the Otsu et al. (2018) spectral upsampling method.
Tree_Otsu2018(*args, **kwargs)	A sub-class of colour.recovery.otsu2018.Node class representing the root node of a tree containing information shared with all the nodes, such as the standard observer colour matching functions and the illuminant, if any is used.

Smits (1999)

colour.recovery

RGB_to_sd_Smits1999(RGB)	Recover the spectral distribution of given RGB colourspace array using Smits (1999) method.
SDS_SMITS1999	Smits (1999) spectral distributions.

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