Applies the categorical colour vision model of Troje (1993)
categorical(vismodeldata)
(required) quantum catch color data. Can be either the result
from vismodel()
or independently calculated data (in the form of a data frame
with four columns named 'u' ,'s', 'm', 'l', representing a tetrachromatic viewer).
Object of class colspace
consisting of the following columns:
R7p, R7y, R8p, R8y
: the quantum catch data used to
calculate the remaining variables.
x, y
: cartesian coordinates in the categorical colour space.
r.vec
: the r vector (saturation, distance from the center).
h.theta
: angle theta (in radians), a continuous measure of stimulus hue.
category
: fly-colour category. One of p-y-
, p-y+
, p+y-
, p+y+
.
Troje N. (1993). Spectral categories in the learning behaviour of blowflies. Zeitschrift fur Naturforschung C, 48, 96-96.