munsellinterpol (version 3.1-0)

LabToMunsell: Convert CIE Lab coordinates to Munsell HVC

Description

LabToMunsell Converts CIE Lab coordinates to Munsell HVC, by interpolating over the extrapolated Munsell renotation data

Usage

LabToMunsell( Lab, white='D65', adapt='Bradford', ... )

Value

An Nx3 matrix with the Munsell HVC coordinates in each row. The rownames are set to those of Lab.

Arguments

Lab

CIE Lab coordinates. An Nx3 matrix, or a vector that can be converted to such a matrix. Each row of the matrix has Lab.

white

XYZ for the source white - a numeric 3-vector with scaling irrelevant. white can also be a numeric 2-vector; which is interpreted as xy chromaticity and converted to XYZ with Y=100. white can also be the name of any standard illuminant recognized by spacesXYZ::standardXYZ() which is scaled so that Y=100. The default 'D65' is converted to c(95.047,100,108.883).

adapt

method for chromatic adaptation, see spacesXYZ::CAT() for valid values. Also see Details.

...

other parameters passed to XYZtoMunsell()

Author

Jose Gama and Glenn Davis

Details

The conversion is done in these steps.

• Lab → XYZ using spacesXYZ::XYZfromLab() with the given white.

• XYZ is then adapted from the given white to Illuminant C using the given adapt method.

• XYZ → HVC using XYZtoMunsell().

References

Paul Centore 2014 The Munsell and Kubelka-Munk Toolbox https://www.munsellcolourscienceforpainters.com/MunsellAndKubelkaMunkToolbox/MunsellAndKubelkaMunkToolbox.html

See Also

MunsellToLab(), XYZtoMunsell(), spacesXYZ::standardXYZ(), spacesXYZ::CAT(), spacesXYZ::XYZfromLab()

Examples

LabToMunsell( c(74.613450, -20.4, 10.1,    80, 0, 0) )
##                      H        V       C
##  3.1G 7.4/3.6 43.13641 7.379685 3.62976
##  N 7.9/        0.00000 7.945314 0.00000