Andrew, These are fascinating images.
Several years ago I tried to convince people that GRB would be a better
palette than RGB. I used Cliff's image, your first pattern, and rotated it
90 degrees. If you think of this as the face of a clock, then in an hour the
GRB palette goes from white to black in a continuous value from light to
dark when seen as a grayscale. Green ns brighter than Red, which is
brighter than blue.
require 'viewmat'
at2=: 13 :'([:{:"1 *.) j./"1 y'
RGB=: 255* #:i.8
GRB=:1 0 2{"1 RGB
we=: 13 :'<.0++/"1[0.3 0.59 0.11*"1 y'
gray=: 13 :'3#"0 we y'
RGB viewmat (D=.at2"0 /~ i:500)
GRB viewmat (D=.at2"0 /~ i:500)
(gray RGB) viewmat (D=.at2"0 /~ i:500)
(gray GRB) viewmat (D=.at2"0 /~ i:500)
(Another little exercise for JHS)
Maybe you'll make some interesting discoveries with your other patterns.
Linda
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