munsellinterpol (version 3.1-0)

HVCfromMunsellName: Convert Munsell Notation to numerical Munsell HVC

Description

Convert Munsell Notation to numerical Munsell HVC

Usage

HVCfromMunsellName( MunsellName )
MunsellHVC( MunsellName )
HueNumberFromString( HueString )

Value

HVCfromMunsellName()

returns a numeric Nx3 matrix with HVC in the rows. For neutral colors, both H and C are set to 0. If a string cannot be parsed, the entire row is set to NAs. The rownames are set to MunsellName.

MunsellHVC()

returns a character Nx3 matrix with HVC in the rows, and is there for backward compatibility with older versions of the package. For neutral colors, H is set to 'N' and C is set to '0'.

HueNumberFromString() returns the hue number H (in (0,100]). If the string cannot be parsed, or the color is neutral, the output is set to NA.

For all functions the Hue Number is wrapped to (0,100].

Arguments

MunsellName

a character vector of length N > 0, where each string should be a valid Munsell notation, e.g. '2.3P 5/2.3', '9.2YR 3/6', 'N 2.3/', and 'N 4/0'. Whitespace is optional and ignored. It is OK for a neutral to end in either '/' or '/0'.

HueString

a character vector of length N > 0, where each string should be the initial hue part of a Munsell notation, e.g. '4.5GY', '2.5R', '10.3B', etc. Whitespace is optional and ignored. Neutrals, denoted by 'N', are invalid because the hue is undefined.

Author

Glenn Davis

References

Nimeroff, I. Colorimetry. National Bureau of Standards Monograph 104. January 1968. 35 cents.

ASTM D 1535-80. Standard Practice for Specifying Color by the Munsell System. 1980.

Munsell Book of Color: defining, explaining, and illustrating the fundamental characteristics of color. Munsell Color Co. 1929.

Atlas of the Munsell Color System. Malden, Mass., Wadsworth, Howland & Co., inc., Printers. 1915.

See Also

MunsellNameFromHVC(), HueStringFromNumber()

Examples

HVCfromMunsellName( c( "4.2P 2.9/3.8", "N 2.3/", "N 8.9/0" ) )
##                  H   V   C
##  4.2P 2.9/3.8 84.2 2.9 3.8
##  N 2.3/        0.0 2.3 0.0
##  N 8.9/0       0.0 8.9 0.0

HueNumberFromString( c('4B','4.6GY','10RP','N') )
##  [1]  64.0  34.6 100.0    NA