A stopgap function for generating a pavo::coldist object
from CIE Lab colors. This a pretty serious abstraction of the
original intention of a coldist object, which is to use
a combination of spectra data, visual model, and/or receptor-noise
model to calculate perceived chromatic and achromatic distances
between colors. Because CIE Lab color space is an approximately
perceptually uniform color space for human vision, we can calculate
a version of those distances for a human viewer directly from
CIE Lab. A decent option if you want preliminary results,
if you only care about human perception, or if you don't have access
to spectral data.
Arguments
- rgbcols
An nx3 matrix of RGB colors (rows are colors and columns are R, G, and B channels).
Value
A pavo::coldist object with four columns: the patches
being contrasted (columns 1-2), the chromatic contrast (dS),
and the achromatic contrast (dL), all in units of Euclidean
distance in CIE Lab space.