pavo (version 2.9.0)

plot.colspace: Plot spectra in a colourspace

Description

Plots reflectance spectra in the appropriate colourspace.

Usage

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

Value

A colourspace plot appropriate to the input data.

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().

Author

Rafael Maia

Thomas White

Chad Eliason

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()

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)

if (FALSE) { # interactive() | identical(Sys.getenv("IN_PKGDOWN"), "true")
# 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)
}