RGB | R Documentation |
The data were obtained from the measurements of the luminance
of the R
, G
and B
channels individually,
as well as the three together, W, for each of 21 grey levels,
GL
from a screen on which a video projector was displaying
an image of a uniform field. Grey level has been normalized to
the interval [0, 1], though originally it is specified as integers
in [0, 255]. The measurements were obtained with a Photo Research
650 spectro-radiometer.
data(RGB)
A data frame with 84 observations on the following 3 variables.
Lum
numeric vector of the measured luminance
in candelas/meter^2
GL
The grey level normalized to the interval [0, 1]
Gun
factor with levels R
G
B
W
data(RGB)
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