Convert Colorlab Munsell Format to Munsell HVC
Convert Colorlab Munsell Format to Munsell HVC
ColorlabFormatToMunsellSpec( HVCH )
HVCH |
a numeric Nx4 matrix, or a vector that can be converted to such a matrix, by row.
Each row of the matrix contains an HVCH vector. |
Colorlab Munsell format uses 4 numbers.
Hue Step, in the interval (0,10], or 0 for neutrals
Munsell Value, in the interval (0,10]
Munsell Chroma, non-negative
Hue Index, an integer from 1 to 10, or 0 for neutrals
an Nx3 matrix, with each row an HVC vector.
Value and Chroma are simply copied unchanged.
The complex part is conversion of Colorlab Hue Step and Hue Index
to Hue Number.
For neutrals, both Hue Step and Hue Index are ignored.
Invalid input values, such as a Hue Index that is not
an integer from 0 to 10 (except for neutrals), are converted to NAs.
The rownames of the input are copied to the output,
but if these are NULL, the rownames are set to the Munsell notations.
Jose Gama and Glenn Davis
Color Processing Toolbox. Colorlab 1.0. http://www.uv.es/vista/vistavalencia/software/colorlab.html
ColorlabFormatToMunsellSpec( c( 3.2,3,2,1, 2,5.1,0,0, 2,5.1,0.1,0 ) ) ## H V C ## 3.20B 3.00/2.00 63.2 3.0 2 ## N 5.10/ 0.0 5.1 0 ## <NA> NA NA NA
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