From: Eli Zaretskii <eliz@gnu.org>
To: Mark Oteiza <mvoteiza@udel.edu>
Cc: emacs-devel@gnu.org
Subject: Re: Doc string and operation of color-distance
Date: Fri, 15 Sep 2017 16:40:00 +0300 [thread overview]
Message-ID: <831sn8m66n.fsf@gnu.org> (raw)
In-Reply-To: <874ls5xdzz.fsf@udel.edu> (message from Mark Oteiza on Thu, 14 Sep 2017 15:43:28 -0400)
> From: Mark Oteiza <mvoteiza@udel.edu>
> Date: Thu, 14 Sep 2017 15:43:28 -0400
> Cc: emacs-devel@gnu.org
>
> At the very least we should feed metrics the translated RGBs.
Yes. But it would be nicer if the lcms.c functions accepted colors in
any form supported by Emacs: a color name, a string RGB spec, or a
list of RGB values. I think.
> Beyond that, in order to use (for example) lcms2-cam02-ucs with
> color-distance, one has to translate RGB to XYZ, so the metric would be
>
> (lambda (a b)
> (lcms2-cam02-ucs (color-srgb-to-xyz a) (color-srgb-to-xyz b))
color-srgb-to-xyz accepts 3 arguments, not one. Also, its doc string
says the components are floats between 0 and 1. So this should be
amended accordingly.
next prev parent reply other threads:[~2017-09-15 13:40 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-14 18:45 Doc string and operation of color-distance Eli Zaretskii
2017-09-14 19:12 ` Mark Oteiza
2017-09-15 13:30 ` Eli Zaretskii
2017-09-15 16:45 ` Mark Oteiza
2017-09-15 17:24 ` Eli Zaretskii
2017-09-14 19:43 ` Mark Oteiza
2017-09-14 20:23 ` Mark Oteiza
2017-09-15 13:41 ` Eli Zaretskii
2017-09-15 13:40 ` Eli Zaretskii [this message]
2017-09-15 15:15 ` Mark Oteiza
2017-09-15 16:32 ` Mark Oteiza
2017-09-15 17:26 ` Eli Zaretskii
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