Description Usage Arguments Value Author(s) See Also Examples
View source: R/colourvision_package.R
Calculates a matrix with all possible pairwise comparison between stimulus reflectance spectra based on a given colour vision model output.
1 | deltaS(model)
|
model |
Output of a colour vision model |
.
A matrix with pairwise chromaticity distances.
Felipe M. Gawryszewski f.gawry@gmail.com
CTTKmodel
, RNLmodel
, EMmodel
,GENmodel
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 | ##Photoreceptor sensitivity curves
##with lambda max at 350nm, 450nm and 550nm:
C<-photor(lambda.max=c(350,450,550))
## Grey background
## with 10 percent reflectance from 300 to 700nm:
Rb <- data.frame(300:700, rep(10, length(300:700)))
## Read CIE D65 standard illuminant
data("D65")
## Reflectance data
## with a sigmoid spectrum and midpoint at 500nm
R1<-logistic(x=seq(300,700,1), x0=450, L=50, k=0.04)
R2<-logistic(x=seq(300,700,1), x0=500, L=50, k=0.04)
R3<-logistic(x=seq(300,700,1), x0=550, L=50, k=0.04)
R<-cbind(R1,R2[,2],R3[,2])
## Run model
model<-CTTKmodel(photo=3, R=R, I=D65,
Rb=Rb, C=C)
#Chromaticity distances between R1, R2 and R3
deltaS(model)
|
Warning messages:
1: In rgl.init(initValue, onlyNULL) : RGL: unable to open X11 display
2: 'rgl_init' failed, running with rgl.useNULL = TRUE
3: .onUnload failed in unloadNamespace() for 'rgl', details:
call: fun(...)
error: object 'rgl_quit' not found
R R2[, 2] R3[, 2]
R 0.0000000 0.1800259 0.4325408
R2[, 2] 0.1800259 0.0000000 0.2727298
R3[, 2] 0.4325408 0.2727298 0.0000000
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