From: Greg Troxel <gdt@work.lexort.com>
To: Julien Danjou <julien@danjou.info>
Cc: Ted Zlatanov <tzz@lifelogs.com>, ding@gnus.org
Subject: Re: Colour manipulation
Date: Tue, 23 Nov 2010 20:09:15 -0500 [thread overview]
Message-ID: <smu1v6b5xz8.fsf@linuxpal.mit.edu> (raw)
In-Reply-To: <sa3sjysh0bo.fsf@cigue.easter-eggs.fr> (Julien Danjou's message of "Tue, 23 Nov 2010 10:10:51 +0100")
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Julien Danjou <julien@danjou.info> writes:
> Any hint appreciated, while I read the Wikipedia page.
IIRC there are multiple forms, some of which are defects in cone types
and some in the later signal processing. The approach I'd try is to
have a variable that can be set to various tokens to indicate them, and
do some sort of folding of colors according to the particular problem
before doing the distance-in-color-space calculations.
I can no longer remember where I read this, but in some color theory
reading there was a credible claim that there's a neural coding to
luminance and red/green and yellow/blue and that some colorblindness is
a neural problem in those pathways rather then a cone defect. See
http://www.handprint.com/HP/WCL/color2.html
and search for "In 1949 D.B. Judd specified".
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prev parent reply other threads:[~2010-11-24 1:09 UTC|newest]
Thread overview: 67+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <E1PArgx-0006dS-00@quimby.gnus.org>
2010-10-26 23:58 ` [gnus git] branch master updated: =1= shr.el (shr-tag-div): Added Lars Magne Ingebrigtsen
2010-10-27 0:15 ` Katsumi Yamaoka
2010-10-27 0:22 ` Katsumi Yamaoka
2010-10-27 0:28 ` Lars Magne Ingebrigtsen
2010-10-27 0:43 ` Katsumi Yamaoka
2010-10-27 18:06 ` Ted Zlatanov
2010-10-29 23:18 ` Lars Magne Ingebrigtsen
2010-11-09 22:25 ` Ted Zlatanov
2010-11-09 22:47 ` Lars Magne Ingebrigtsen
2010-11-09 23:02 ` Steinar Bang
2010-11-10 9:54 ` Julien Danjou
2010-11-10 17:49 ` Colourspace (was: [gnus git] branch master updated: =1= shr.el (shr-tag-div): Added.) Lars Magne Ingebrigtsen
2010-11-10 19:09 ` Colourspace Julien Danjou
2010-11-10 19:44 ` Colourspace Ted Zlatanov
2010-11-10 19:56 ` Colourspace Julien Danjou
2010-11-10 20:22 ` ELPA and Gnus (was: Colourspace) Ted Zlatanov
2010-11-10 20:48 ` ELPA and Gnus Lars Magne Ingebrigtsen
2010-11-10 21:23 ` Ted Zlatanov
2010-11-10 21:32 ` Lars Magne Ingebrigtsen
2010-11-11 13:19 ` Ted Zlatanov
2010-11-14 16:07 ` Lars Magne Ingebrigtsen
2010-11-15 15:43 ` Julien Danjou
2010-11-11 9:06 ` Julien Danjou
2010-11-14 16:07 ` Lars Magne Ingebrigtsen
2010-11-10 20:48 ` Colourspace Lars Magne Ingebrigtsen
2010-11-10 20:55 ` Colourspace Lars Magne Ingebrigtsen
2010-11-11 8:59 ` Colourspace Julien Danjou
2010-11-18 18:49 ` Colourspace Ted Zlatanov
2010-11-10 13:14 ` [gnus git] branch master updated: =1= shr.el (shr-tag-div): Added Ted Zlatanov
2010-11-19 16:13 ` Julien Danjou
2010-11-21 4:40 ` Lars Magne Ingebrigtsen
2010-11-21 13:55 ` Julien Danjou
2010-11-21 18:38 ` Colour manipulation (was: [gnus git] branch master updated: =1= shr.el (shr-tag-div): Added.) Lars Magne Ingebrigtsen
2010-11-21 18:55 ` Colour manipulation Julien Danjou
2010-11-21 19:02 ` Lars Magne Ingebrigtsen
2010-11-21 19:26 ` Julien Danjou
2010-11-21 19:42 ` Lars Magne Ingebrigtsen
2010-11-22 14:49 ` Julien Danjou
2010-11-24 2:27 ` Katsumi Yamaoka
2010-11-24 5:45 ` Katsumi Yamaoka
2010-11-24 6:39 ` Lars Magne Ingebrigtsen
2010-11-24 8:43 ` Julien Danjou
2010-11-24 20:37 ` Lars Magne Ingebrigtsen
2010-11-24 20:48 ` Lars Magne Ingebrigtsen
2010-11-24 21:18 ` Julien Danjou
2010-11-24 21:27 ` Lars Magne Ingebrigtsen
2010-11-24 8:52 ` Julien Danjou
2010-11-24 6:39 ` Lars Magne Ingebrigtsen
2010-11-24 8:37 ` Julien Danjou
2010-11-22 15:37 ` Julien Danjou
2010-11-22 15:59 ` Lars Magne Ingebrigtsen
2010-11-23 1:38 ` Lars Magne Ingebrigtsen
2010-11-23 9:15 ` Julien Danjou
2010-11-23 23:50 ` Lars Magne Ingebrigtsen
2010-11-23 9:48 ` Julien Danjou
2010-11-23 23:52 ` Lars Magne Ingebrigtsen
2010-11-21 19:57 ` Frank Schmitt
2010-11-22 19:47 ` Ted Zlatanov
2010-11-23 9:10 ` Julien Danjou
2010-11-23 14:52 ` Ted Zlatanov
2010-11-23 15:54 ` Julien Danjou
2010-11-23 16:15 ` Ted Zlatanov
2010-11-23 18:32 ` Colour blindness correction (was: Colour manipulation) Julien Danjou
2010-11-23 23:50 ` Colour manipulation Lars Magne Ingebrigtsen
2010-11-24 8:32 ` Julien Danjou
2010-11-26 20:17 ` Adam Sjøgren
2010-11-24 1:09 ` Greg Troxel [this message]
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