From phma@webjockey.net Thu Mar 14 13:31:27 2002 Return-Path: X-Sender: phma@ixazon.dynip.com X-Apparently-To: lojban@yahoogroups.com Received: (EGP: unknown); 14 Mar 2002 21:31:27 -0000 Received: (qmail 42428 invoked from network); 14 Mar 2002 21:31:27 -0000 Received: from unknown (216.115.97.172) by m11.grp.snv.yahoo.com with QMQP; 14 Mar 2002 21:31:27 -0000 Received: from unknown (HELO neofelis.ixazon.lan) (208.150.110.21) by mta2.grp.snv.yahoo.com with SMTP; 14 Mar 2002 21:31:26 -0000 Received: by neofelis.ixazon.lan (Postfix, from userid 500) id 109D83C475; Thu, 14 Mar 2002 16:31:18 -0500 (EST) Content-Type: text/plain; charset="utf-8" To: lojban@yahoogroups.com Subject: Re: [lojban] color Date: Thu, 14 Mar 2002 16:31:17 -0500 X-Mailer: KMail [version 1.2] References: In-Reply-To: X-Spamtrap: fesmri@ixazon.dynip.com MIME-Version: 1.0 Message-Id: <0203141631170H.02388@neofelis> Content-Transfer-Encoding: 8bit Sender: phma@ixazon.dynip.com From: Pierre Abbat X-Yahoo-Group-Post: member; u=92712300 On Thursday 14 March 2002 15:10, Jay Kominek wrote: > Er. Human vision is made up of 3 measurements, and is thus, a three > dimensional state space. RGB is a 3 dimensional state space. Ignoring > matters of the relative intensities of R, G and B as the eye experiences > them and such, RGB (with enough resolution) should be able to encode any > color we can see. All the other color schemes with at least 3 state > variables should be able to do so, as well. (Give or take, you can design > a broken one, but that is pathological.) It's actually four-dimensional - the fourth one is the rods, which aren't very important in daylight - but the reason you can't find three colors to make all visible colors is that the RGB cone sensitivity curves overlap. phma