Plot spectra in a colourspace

Plots reflectance spectra in the appropriate colourspace.

# S3 method for class 'colspace'
plot(x, ...)

Arguments

x

(required) an object of class colspace.

...

additional graphical options, which vary by modeled space. Refer to their individual documentation:

• diplot(): dichromat space

• triplot(): trichromat space

• tetraplot(): tetrahedral space

• catplot(): categorical space

• hexplot(): colour hexagon

• cocplot(): colour-opponent-coding space

• cieplot(): cie spaces

• segplot(): segment analysis space

• jndplot(): perceptual, 'noise corrected' space (for the results of jnd2xyz())

Also see par().

Value

A colourspace plot appropriate to the input data.

References

Smith T, Guild J. (1932) The CIE colorimetric standards and their use. Transactions of the Optical Society, 33(3), 73-134.

Westland S, Ripamonti C, Cheung V. (2012). Computational colour science using MATLAB. John Wiley & Sons.

Chittka L. (1992). The colour hexagon: a chromaticity diagram based on photoreceptor excitations as a generalized representation of colour opponency. Journal of Comparative Physiology A, 170(5), 533-543.

Chittka L, Shmida A, Troje N, Menzel R. (1994). Ultraviolet as a component of flower reflections, and the colour perception of Hymenoptera. Vision research, 34(11), 1489-1508.

Troje N. (1993). Spectral categories in the learning behaviour of blowflies. Zeitschrift fur Naturforschung C, 48, 96-96.

Stoddard, M. C., & Prum, R. O. (2008). Evolution of avian plumage color in a tetrahedral color space: A phylogenetic analysis of new world buntings. The American Naturalist, 171(6), 755-776.

Endler, J. A., & Mielke, P. (2005). Comparing entire colour patterns as birds see them. Biological Journal Of The Linnean Society, 86(4), 405-431.

Kelber A, Vorobyev M, Osorio D. (2003). Animal colour vision - behavioural tests and physiological concepts. Biological Reviews, 78, 81 - 118.

Backhaus W. (1991). Color opponent coding in the visual system of the honeybee. Vision Research, 31, 1381-1397.

Endler, J. A. (1990) On the measurement and classification of color in studies of animal color patterns. Biological Journal of the Linnean Society, 41, 315-352.

See also

plot(), points.colspace()

Author

Rafael Maia rm72@zips.uakron.edu

Thomas White thomas.white026@gmail.com

Chad Eliason cme16@zips.uakron.edu

Examples

data(flowers)
data(sicalis)

# Dichromat
vis.flowers <- vismodel(flowers, visual = "canis")
di.flowers <- colspace(vis.flowers, space = "di")
plot(di.flowers)


# Colour hexagon
vis.flowers <- vismodel(flowers,
  visual = "apis", qcatch = "Ei", relative = FALSE,
  vonkries = TRUE, achromatic = "l", bkg = "green"
)
hex.flowers <- colspace(vis.flowers, space = "hexagon")
plot(hex.flowers, sectors = "coarse")


# Tetrahedron (static)
vis.sicalis <- vismodel(sicalis, visual = "avg.uv")
tcs.sicalis <- colspace(vis.sicalis, space = "tcs")
plot(tcs.sicalis)


# Tetrahedron (interactive)
vis.sicalis <- vismodel(sicalis, visual = "avg.uv")
tcs.sicalis <- colspace(vis.sicalis, space = "tcs")
tcsplot(tcs.sicalis, size = 0.005)

## Add points to interactive tetrahedron
patch <- rep(c("C", "T", "B"), 7)
tcs.crown <- subset(tcs.sicalis, "C")
tcs.breast <- subset(tcs.sicalis, "B")
tcsplot(tcs.crown, col = "blue")
tcspoints(tcs.breast, col = "red")



## Plot convex hull in interactive tetrahedron
tcsplot(tcs.sicalis, col = "blue", size = 0.005)
tcsvol(tcs.sicalis)