In colorspace.R I see:
setAs("color", "LAB", function(from)
LAB(.Call("as_LAB", from@coords, class(from), .WhitePoint, PACKAGE = "
colorspace"),
names = dimnames(from@coords)[[1]]))
...
.WhitePoint = NULL
and then in colorspace.c and the function CheckWhite(),
I see that .WhitePoint = NULL is converted to D65.
I would like to pass a different .WhitePoint to
as( XYZ( 100,100,100) , "LAB" )
I have tried 3 methods:
as( XYZ( 100,100,100) , "LAB", .WhitePoint=XYZ(95,100,105) )
.WhitePoint = XYZ(95,100,105)
assign( ".WhitePoint", XYZ(95,100,105), env=as.environment('package:
colorspace') )
but all fail, for different reasons.
How can I transform XYZ to LAB using a whitepoint different than D65 ?
Thanks,
Glenn Davis
gda...@gluonics.com
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