Convert a Munsell specification to sRGB coordinates
MunsellTosRGB Converts a
Munsell specification to non-linear sRGB coordinates, by interpolating over the
extrapolated Munsell renotation data
MunsellTosRGB( MunsellSpec, maxSignal=255, ... )
MunsellSpec |
a numeric Nx3 matrix with HVC values in the rows, or a vector that can be converted to such a matrix, by row. |
maxSignal |
maximum of signal sRGB; Other popular values are 1, 1023, and 65535 |
... |
other parameters passed to |
The conversion is done in these steps.
HVC → xyY using MunsellToxyY(). This xyY is for Illuminant C.
xyY is adapted from Illuminant C to Illuminant D65 (from the sRGB standard) using
adaptxyY() and the Bradford chromatic adaptation method (CAT)
xyY → XYZ using XYZfromxyY()
XYZ → sRGB using RGBfromXYZ() with the given maxSignal
a data.frame with these columns
xyY |
an Nx3 matrix with xyY values in the rows, that are adapted to Illuminant C.
This is an intermediate result that is sometimes useful, e.g. it can be passed
to |
RGB |
an Nx3 matrix with non-linear signal sRGB values in the rows. All values are clamped to the appropriate cube, e.g. [0,255]^3 |
OutOfGamut |
logical vector, TRUE means the result was out of gamut (the cube) before clamping it |
The function MunsellToRGB() also performs this conversion.
The only reason to use this one is that it takes a little less time,
since the CAT (using the Bradford method) is precomputed.
Jose Gama and Glenn Davis
Paul Centore 2014 The Munsell and Kubelka-Munk Toolbox http://centore.isletech.net/~centore/MunsellAndKubelkaMunkToolbox/MunsellAndKubelkaMunkToolbox.html
MunsellToXYZ(),
MunsellToRGB(),
RGBfromXYZ(),
XYZfromxyY(),
CAT(),
IsWithinMacAdamLimits()
MunsellTosRGB('7.6P 8.9/2.2')
## SAMPLE_NAME xyY.x xyY.y xyY.Y RGB.R RGB.G RGB.B OutOfGamut
## 7.6P 8.9/2.2 7.6P 8.9/2.2 0.3109520 0.3068719 74.6134498 231.3575 221.1421 230.3501 FALSEPlease choose more modern alternatives, such as Google Chrome or Mozilla Firefox.