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A note of color
Transcript of A note of color
tuple: (a, b, c, ...)
a note of
(1, 0, 0)
assign colors by applying rules
rule: "oil curves should be green"
chose n "different" colors
uniform changes of L*a*b* components correspond to uniform changes in perceived color
how to measure the difference?
(r1 - r2) + (g1 - g2) + (b1 - b2)
(r1, g1, b1)
(r2, g2, b2)
what is the minimum distance such that two colors can be distinguishable?
is this distance uniform?
(0, 0, 255)
(20, 20, 255)
eD ~ 21
(l1- l2) + (a1 - a2) + (b1 - b2)
(l2, a2, b2)
(l1, a1, b1)
eD ~ 2.3 corresponds to a JND (just noticeable difference)
generate n colors using HSL / following rules
lightness, hue, ...
RGB, CMYK, ...
CIE-XYZ, CIE-LUV, CIE-UVW, HSL, HSV, ...
CMYK (printers), RGB (displays)...
not perceptually linear
International Commission on Illumination
detect those undistiguishable using LAB
generate different tones of them using HSL
2. benefits vs computational cost
1. just a use case
3. better ways to pick colors might prevent us from detecting color collision
based on 1931 CIE-XYZ model