Re:HCL: a color model that actually matches our perceptions ...
by jacobolus on Wednesday April 06, 2016 @02:16PM
(#11440610)
Yes, but in davidjohnstone’s link which yoodenvranx is talking about, what that Wikipedia page calls HSL is being called HCL, whereas what you are calling HCL is being called Lch. (CIE LCh or CIELCH, optionally with a subscript 'ab' to distinguish it from the cylindrical version of CIELUV, would be a better, relatively unambiguous name. By convention, the C should be capitalized.)
Re:HCL: a color model that actually matches our perceptions ...
by laughinghan on Wednesday April 06, 2016 @02:26PM
(#11440676)
Oh my god you're so right
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No. HSV and HSL are two very similar physically-based color models that only loosely map to perceived brightness and perceived grayness: https://en.wikipedia.org/wiki/HSL_and_HSV
They are nice cylindrical shapes because they are straightforward transformations of the RGB cube-shaped color space.
By contrast, HCL is a biologically-based close approximation of actual perceived brightness and perceived grayness: https://en.wikipedia.org/wiki/Lab_color_space
It has a funky shape because the frequency responses of the color-sensitive pigments in the cones of our eyes are complicated: https://en.wikipedia.org/wiki/CIE_1931_color_space#Color_mat...
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