Andrew, It is a bug. I've located the source and fixed it. I will upload the changes to git tomorrow, after I could do some testing just to make sure the fix doesn't break anything else.
Thanks again for reporting. Best regards Marti Quoting Andrew Francis <andrew.fran...@ssgl.com>: > Hi Marti, > > Thanks for the quick response. Here's some more information about the > problem. I'm using the sRGB profile downloaded from the ICC website > and I converted to Postscript using the 1.5 tool (to produce > sRGB_IEC61966-2-1_no_black_scaling.icc.1.ps) and the 2.0 tool (to > produce sRGB_IEC61966-2-1_no_black_scaling.icc.2.ps). There's a minor > difference in the BlackPoint component that seems due to precision. > But the MatrixABC is very different. > > I've also attached a small screenshots of a Postscript document I'm > working on using the converted profile. I created the PNGs by > displaying the PS document in GSView > (http://pages.cs.wisc.edu/~ghost/gsview/), taking a screenshot and > cutting small parts of it to illustrate the difference. The one that > looks gray (no_profile.png) just displays the RGB image using the > "colorimage" operator in Postscript. The one that looks green > (Profile_v2.png) uses the converted profile as a parameter to > "setcolorspace" and then displays the image using the "image" > operator (supplying a dictionary parameter). > > Please let me know if you need more information about the problem. > > Thanks, > > Andrew Francis > Head of Technology > > T: + 44 (0) 20 7534 3833 > F: + 44 (0) 20 7990 9092 > andrew.fran...@ssgl.com > www.serversidegroup.com > > Serverside Group Limited > 16 Kingly Street, London, W1B 5PT United Kingdom > > This e-mail (including any attachments), is confidential and intended > only for the use of the addressee(s). It may contain information > covered by legal, professional or other privilege. If you are not an > addressee, please inform the sender immediately and destroy this > e-mail. Do not copy, forward, use or disclose this e-mail. Serverside > Group Limited and its associated companies make the protection of > their intellectual property rights a priority. For further details > please visit www.serversidegroup.com/about/ipr.html. Any views > expressed in this message are those of the individual sender, except > where the sender specifically states them to be views of Serverside > Group Limited. Company registered in England, No. 04637582, VAT No. > 810 5056 71. > > > > -----Original Message----- > From: i...@littlecms.com [mailto:i...@littlecms.com] > Sent: 16 September 2010 10:31 > To: Andrew Francis > Cc: lcms-user@lists.sourceforge.net > Subject: Re: Converting sRGB to Postscript > > > Hi Andrew, > > This may certainly be a bug. Thanks for reporting. I will try to > reproduce and fix it ASAP. > > Best regards > Marti > > Quoting Andrew Francis <andrew.fran...@ssgl.com>: > >> Hi, >> >> >> >> I've tried to convert the sRGB ICC profiles (black scaled and no black >> scaling) to Postscript using icc2ps.exe (v1.5) and psicc.exe (v2) and >> they produce different results, mainly in the MatrixABC component. When >> I used the resulting CSA in a Postscript document, the image using the >> v2 version had a really strong green hue that's very different from the >> expected result. Am I supposed to use the v2 CSA differently to the v1.5 >> one? I had a look at the blog and it seems like the problem might be >> related to the "Unbounded CMM mode" but I don't understand it enough to >> say for sure. Is there a command line option I'm missing to make v2 >> produce results close to v1.5? >> >> >> >> Thanks, >> >> >> >> Andrew Francis >> >> Head of Technology >> >> >> >> T: + 44 (0) 20 7534 3833 >> >> F: + 44 (0) 20 7990 9092 >> >> andrew.fran...@ssgl.com <mailto:andrew.fran...@ssgl.com> >> >> www.serversidegroup.com <http://www.serversidegroup.com> >> >> <http://www.serversidegroup.com/> >> >> Serverside Group Limited >> 16 Kingly Street, London, W1B 5PT United Kingdom >> >> This e-mail (including any attachments), is confidential and intended >> only for the use of the addressee(s). It may contain information covered >> by legal, professional or other privilege. If you are not an addressee, >> please inform the sender immediately and destroy this e-mail. Do not >> copy, forward, use or disclose this e-mail. Serverside Group Limited and >> its associated companies make the protection of their intellectual >> property rights a priority. For further details please visit >> www.serversidegroup.com/about/ipr.html >> <http://www.serversidegroup.com/about/ipr.html> . Any views expressed in >> this message are those of the individual sender, except where the sender >> specifically states them to be views of Serverside Group Limited. >> Company registered in England, No. 04637582, VAT No. 810 5056 71. >> >> >> >> >> >> >> >> ______________________________________________________________________ >> This email has been scanned by the MessageLabs Email Security System. >> For more information please visit http://www.messagelabs.com/email >> ______________________________________________________________________ > > > > ______________________________________________________________________ > This email has been scanned by the MessageLabs Email Security System. > For more information please visit http://www.messagelabs.com/email > ______________________________________________________________________ > > ______________________________________________________________________ > This email has been scanned by the MessageLabs Email Security System. > For more information please visit http://www.messagelabs.com/email > ______________________________________________________________________ ------------------------------------------------------------------------------ Start uncovering the many advantages of virtual appliances and start using them to simplify application deployment and accelerate your shift to cloud computing. http://p.sf.net/sfu/novell-sfdev2dev _______________________________________________ Lcms-user mailing list Lcms-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lcms-user
