From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.emacs.gnus.general/74252 Path: news.gmane.org!not-for-mail From: Ted Zlatanov Newsgroups: gmane.emacs.gnus.general Subject: Re: Colour manipulation Date: Mon, 22 Nov 2010 13:47:48 -0600 Organization: =?utf-8?B?0KLQtdC+0LTQvtGAINCX0LvQsNGC0LDQvdC+0LI=?= @ Cienfuegos Message-ID: <87zkt1b0nv.fsf@lifelogs.com> References: <87pquvldcs.fsf@lifelogs.com> <87oc9yp21w.fsf@lifelogs.com> <87lj4pmgu7.fsf@keller.adm.naquadah.org> <87oc9ihjbk.fsf@keller.adm.naquadah.org> <8739quh5gk.fsf@keller.adm.naquadah.org> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: dough.gmane.org 1290455420 24537 80.91.229.12 (22 Nov 2010 19:50:20 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Mon, 22 Nov 2010 19:50:20 +0000 (UTC) To: ding@gnus.org Original-X-From: ding-owner+M22617@lists.math.uh.edu Mon Nov 22 20:50:14 2010 Return-path: Envelope-to: ding-account@gmane.org Original-Received: from util0.math.uh.edu ([129.7.128.18]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1PKcP0-00041L-CE for ding-account@gmane.org; Mon, 22 Nov 2010 20:50:14 +0100 Original-Received: from localhost ([127.0.0.1] helo=lists.math.uh.edu) by util0.math.uh.edu with smtp (Exim 4.63) (envelope-from ) id 1PKcOu-0004hw-2n; Mon, 22 Nov 2010 13:50:08 -0600 Original-Received: from mx1.math.uh.edu ([129.7.128.32]) by util0.math.uh.edu with esmtps (TLSv1:AES256-SHA:256) (Exim 4.63) (envelope-from ) id 1PKcOs-0004hk-Sb for ding@lists.math.uh.edu; Mon, 22 Nov 2010 13:50:06 -0600 Original-Received: from quimby.gnus.org ([80.91.231.51]) by mx1.math.uh.edu with esmtp (Exim 4.72) (envelope-from ) id 1PKcOr-0002rU-Ln for ding@lists.math.uh.edu; Mon, 22 Nov 2010 13:50:06 -0600 Original-Received: from lo.gmane.org ([80.91.229.12]) by quimby.gnus.org with esmtp (Exim 3.36 #1 (Debian)) id 1PKcOq-0007Nt-00 for ; Mon, 22 Nov 2010 20:50:04 +0100 Original-Received: from list by lo.gmane.org with local (Exim 4.69) (envelope-from ) id 1PKcOq-0003wl-JM for ding@gnus.org; Mon, 22 Nov 2010 20:50:04 +0100 Original-Received: from 38.98.147.130 ([38.98.147.130]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 22 Nov 2010 20:50:04 +0100 Original-Received: from tzz by 38.98.147.130 with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 22 Nov 2010 20:50:04 +0100 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 20 Original-X-Complaints-To: usenet@dough.gmane.org X-Gmane-NNTP-Posting-Host: 38.98.147.130 X-Face: bd.DQ~'29fIs`T_%O%C\g%6jW)yi[zuz6;d4V0`@y-~$#3P_Ng{@m+e4o<4P'#(_GJQ%TT= D}[Ep*b!\e,fBZ'j_+#"Ps?s2!4H2-Y"sx" User-Agent: Gnus/5.110011 (No Gnus v0.11) Emacs/24.0.50 (gnu/linux) Cancel-Lock: sha1:UlK6G/VLUG/3TBVr1cbRVVeMjhk= X-Spam-Score: -0.7 (/) List-ID: Precedence: bulk Xref: news.gmane.org gmane.emacs.gnus.general:74252 Archived-At: On Sun, 21 Nov 2010 19:55:23 +0100 Julien Danjou wrote: JD> There's no easy way to know by how much you should increase L, a or b, JD> or what would be the best choice. ...so maybe it should be adjustable by the user? JD> FWIW L is always between 0 and 100, and there's a good chance that just JD> changing it to 0 or 100 (depending on the other color L value) would JD> give for sure a good result. One has to try. JD> I did not write any lab->rgb function, but that's totally doable if JD> needed. :) JD> [1] http://en.wikipedia.org/wiki/Lab_color_space Have you provided anything for colorblind people? Or is that not a priority? (if the latter, I'll give it a try) Ted