Calculates segment classification measures as defined in Endler (1990).
Usage
segspace(vismodeldata)
Arguments
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 columns named 'S1', 'S2', 'S3', 'S4', and, optionally,
'lum', representing a generic 'tetrachromatic' viewer).
Value
A data frame of class colspace consisting of the following columns:
S1, S2, S3, S4: the relative reflectance at each of the four
segments.
LM, MS: segment scores
C, H, B: 'chroma', 'hue' (degrees), and 'brightness' in the segment
classification space
References
Endler, J. A. (1990) On the measurement and classification of
colour in studies of animal colour patterns. Biological Journal of the
Linnean Society, 41, 315-352.