From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.comp.tex.context/68777 Path: news.gmane.org!not-for-mail From: "Hartmut Henkel" Newsgroups: gmane.comp.tex.context Subject: Re: compresslevel and png graphics (mkiv) Date: Fri, 27 May 2011 15:09:14 +0200 Message-ID: <20110527130914.171040@gmx.net> References: <4DDCF96A.3050703@gmx.net> <4DDD14BC.40203@wxs.nl> <4DDE30D0.9040204@gmx.net> <4DDE7D0F.3030002@gmx.net> <4DDF91BF.8030806@gmx.net> Reply-To: mailing list for ConTeXt users NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Trace: dough.gmane.org 1306501769 1050 80.91.229.12 (27 May 2011 13:09:29 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Fri, 27 May 2011 13:09:29 +0000 (UTC) To: mailing list for ConTeXt users , ntg-context@ntg.nl Original-X-From: ntg-context-bounces@ntg.nl Fri May 27 15:09:24 2011 Return-path: Envelope-to: gctc-ntg-context-518@m.gmane.org Original-Received: from balder.ntg.nl ([195.12.62.10]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1QPwn5-0001L2-VX for gctc-ntg-context-518@m.gmane.org; Fri, 27 May 2011 15:09:24 +0200 Original-Received: from localhost (localhost [127.0.0.1]) by balder.ntg.nl (Postfix) with ESMTP id B71CFCAD8D; Fri, 27 May 2011 15:09:23 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at balder.ntg.nl Original-Received: from balder.ntg.nl ([127.0.0.1]) by localhost (balder.ntg.nl [127.0.0.1]) (amavisd-new, port 10024) with LMTP id RMs1Xi2CCno0; Fri, 27 May 2011 15:09:20 +0200 (CEST) Original-Received: from balder.ntg.nl (localhost [127.0.0.1]) by balder.ntg.nl (Postfix) with ESMTP id 4E5CBCAD7D; Fri, 27 May 2011 15:09:20 +0200 (CEST) Original-Received: from localhost (localhost [127.0.0.1]) by balder.ntg.nl (Postfix) with ESMTP id 4E6C2CAD7D for ; Fri, 27 May 2011 15:09:19 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at balder.ntg.nl Original-Received: from balder.ntg.nl ([127.0.0.1]) by localhost (balder.ntg.nl [127.0.0.1]) (amavisd-new, port 10024) with LMTP id wbmi0bC5cQ2p for ; Fri, 27 May 2011 15:09:17 +0200 (CEST) Original-Received: from filter3-ams.mf.surf.net (filter3-ams.mf.surf.net [192.87.102.71]) by balder.ntg.nl (Postfix) with ESMTP id 45AC3CAD75 for ; Fri, 27 May 2011 15:09:17 +0200 (CEST) Original-Received: from mailout-de.gmx.net (mailout-de.gmx.net [213.165.64.22]) by filter3-ams.mf.surf.net (8.14.3/8.14.3/Debian-5+lenny1) with SMTP id p4RD9GDr015038 for ; Fri, 27 May 2011 15:09:16 +0200 Original-Received: (qmail 9076 invoked by uid 0); 27 May 2011 13:09:16 -0000 Original-Received: from 93.204.86.182 by www060.gmx.net with HTTP; Fri, 27 May 2011 15:09:14 +0200 (CEST) In-Reply-To: <4DDF91BF.8030806@gmx.net> X-Authenticated: #6218946 X-Flags: 0001 X-Mailer: WWW-Mail 6100 (Global Message Exchange) X-Priority: 3 X-Provags-ID: V01U2FsdGVkX18FH1YBIaAFRyrUwIs/2LHfVLloX+9nEomT1YsLJb 76FJsLs24GOnckwL7HLxNsnwqaw5tlpJG7lQ== X-GMX-UID: SJvneOwxbmwoerCWNjdLtL5PUzc4clGe X-Bayes-Prob: 0.0001 (Score 0, tokens from: @@RPTN) X-CanIt-Geo: ip=213.165.64.22; country=DE; latitude=51.0000; longitude=9.0000; http://maps.google.com/maps?q=51.0000,9.0000&z=6 X-CanItPRO-Stream: uu:ntg-context@ntg.nl (inherits from uu:default, base:default) X-Canit-Stats-ID: 0cEMB9gKc - fe732167ce87 - 20110527 X-Scanned-By: CanIt (www . roaringpenguin . com) on 192.87.102.71 X-BeenThere: ntg-context@ntg.nl X-Mailman-Version: 2.1.12 Precedence: list List-Id: mailing list for ConTeXt users List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: ntg-context-bounces@ntg.nl Errors-To: ntg-context-bounces@ntg.nl Xref: news.gmane.org gmane.comp.tex.context:68777 Archived-At: > > @luigi: an ICC profile definitely breaks the rules > > > > The only chunks left are > > > > IHDR PNG image header: 5900x4094, 8bits/sample, truecolor, > noninterlaced > > IDAT PNG image data > > .. > > IDAT PNG image data > > IEND end-of-image marker > > > > Mh, where is the show stopper? The compression method? > > > Looks like some of ConTeXt PDF/X-related settings is causing this. If I > reduce the code to the pure picture, the '(PNG copy)' is triggered. > Probably the active color management (default color space) is breaking > the copy process here. must be some \pdfimageapplygamma > 0, only this and the \pdfimagehicolor primitive can influence this low level stuff. Btw, just \pdfimageapplygamma > 0 (without setting \pdfgamma and \pdfimagegamma) already changes the PNG image, since the luatex (and pdftex) internal defaults are not gamma-neutral. No idea if (and then to which value) this should be fixed. Regards, Hartmut -- Empfehlen Sie GMX DSL Ihren Freunden und Bekannten und wir belohnen Sie mit bis zu 50,- Euro! https://freundschaftswerbung.gmx.de ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________