Thread: Re: [Lcms-user] How to create an Icc profile
An ICC-based CMM for color management
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From: <mar...@li...> - 2010-12-21 16:49:58
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Marco, this is not a trivial task, you need a profiler to do that. Commercial profilers are available from X-Rite, Monaco for example. I would, however, recommend you to take a look on Argyll, an open source profiler run by Graeme Gill. I got excellent results from it, comparable if not superior to many commercial ones. http://www.argyllcms.com Hope that helps Marti Original Message: ----------------- From: Marco Bazzani ma....@gm... Date: Mon, 20 Dec 2010 23:42:29 +0100 To: lcm...@li... Subject: [Lcms-user] How to create an Icc profile Hi guys I've the following problem I need to create an ICC profile for a printing device I have a list of CMYK values mapped to L a b values captured using a Spectral Scanner using D65 luminance. I dig through the tutorial, documentation and test suites but I didn't understand very well how to do it. I know which CMYK combination produce a specific Lab combination how can I build a profile? how can I create values for AtoB0 BtoA0 and so on ? thanks in advice Marco ---------------------------------------------------------------------------- -- Lotusphere 2011 Register now for Lotusphere 2011 and learn how to connect the dots, take your collaborative environment to the next level, and enter the era of Social Business. http://p.sf.net/sfu/lotusphere-d2d _______________________________________________ Lcms-user mailing list Lcm...@li... https://lists.sourceforge.net/lists/listinfo/lcms-user -------------------------------------------------------------------- mail2web.com What can On Demand Business Solutions do for you? http://link.mail2web.com/Business/SharePoint |
From: <mar...@li...> - 2010-12-22 10:01:53
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Hi, Color management, at least ICC color management, is a two step process. You need both, ICC profiles for each device you want to integrate in the workflow and a piece of software, called "CMM" that uses those profiles for doing color management. ICC color management requires all "smarts" of gamut mapping to be placed in the profiles. Then actually, building a profile involves a lot of *art* LittleCMS is a CMM. It can use those profiles to perform color management. It does NOT create profiles. It can be used to create the physical files that contains the color mappings, but it does not compute the maps. I can tell you that creating good profiles is a very difficult task, and takes teams of color scientists to define algoriths and settings, taking into account things like memory colors, skin tones, primary preservation and so. So, littlecms is useless for you if you need to create profiles from the end user point of view. As useless as it would be photoshop, which cannot create profiles neither, it only uses yet-exiting profiles. For the programmer point of view, lcms can be used to create the files that contain the colormaps, and many people are using it in such way. That would be, lcms is the canvas artists may use to do their creations. lcms would take care of all details of the profile specification. If you use a library to write PDF files, obviously would not ask that library to invent the contents of your documents. You have more information in the FAQ and in the documentation about the role of lcms. Hope that helps. Marti Original Message: ----------------- From: Marco Bazzani ma....@gm... Date: Tue, 21 Dec 2010 21:15:14 +0100 To: lcm...@li... Subject: Re: [Lcms-user] How to create an Icc profile I wouldn't offend anyone, I ask the question in the wrong way, this is the right way: * Which advantages are there integrating data coming from ArgyII with LittleCMS? * Why LittleCMS can create icc profiles if it doesn't profile anything (it's not sarcastic I would know what can I do with an hPROFILE generated from scratch with lcms)? thanks in advice. On Tue, Dec 21, 2010 at 19:39, Stephen Chu <st...@ju...> wrote: > On 12/21/10 1:31 PM, Marco Bazzani wrote: >> So LittleCMS is completely useless for this task ? > > It may not solve your problem but I would refrain from putting it as > "useless." Some courtesy goes a long way. But it's just me. :) > > > -- > Stephen Chu > <mailto:st...@ju...> > <http://www.ju-ju.com> > > ---------------------------------------------------------------------------- -- > Forrester recently released a report on the Return on Investment (ROI) of > Google Apps. They found a 300% ROI, 38%-56% cost savings, and break-even > within 7 months. Â Over 3 million businesses have gone Google with Google Apps: > an online email calendar, and document program that's accessible from your > browser. Read the Forrester report: http://p.sf.net/sfu/googleapps-sfnew > _______________________________________________ > Lcms-user mailing list > Lcm...@li... > https://lists.sourceforge.net/lists/listinfo/lcms-user > ---------------------------------------------------------------------------- -- Forrester recently released a report on the Return on Investment (ROI) of Google Apps. They found a 300% ROI, 38%-56% cost savings, and break-even within 7 months. Over 3 million businesses have gone Google with Google Apps: an online email calendar, and document program that's accessible from your browser. Read the Forrester report: http://p.sf.net/sfu/googleapps-sfnew _______________________________________________ Lcms-user mailing list Lcm...@li... https://lists.sourceforge.net/lists/listinfo/lcms-user -------------------------------------------------------------------- myhosting.com - Premium Microsoft® Windows® and Linux web and application hosting - http://link.myhosting.com/myhosting |
From: Marco B. <ma....@gm...> - 2010-12-21 18:32:13
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So LittleCMS is completely useless for this task ? or do I need to integrate data coming from ArgyII with LittleCMS ? On Tue, Dec 21, 2010 at 17:49, mar...@li... <mar...@li...> wrote: > > Marco, this is not a trivial task, you need a profiler to do that. > > Commercial profilers are available from X-Rite, Monaco for example. > I would, however, recommend you to take a look on Argyll, an open source > profiler run by Graeme Gill. I got excellent results from it, comparable if > not superior to many commercial ones. http://www.argyllcms.com > > Hope that helps > Marti > > Original Message: > ----------------- > From: Marco Bazzani ma....@gm... > Date: Mon, 20 Dec 2010 23:42:29 +0100 > To: lcm...@li... > Subject: [Lcms-user] How to create an Icc profile > > > Hi guys I've the following problem > I need to create an ICC profile for a printing device > I have a list of CMYK values mapped to L a b values captured using a > Spectral Scanner using D65 luminance. I dig through the tutorial, > documentation and test suites but I didn't understand very well how to > do it. > I know which CMYK combination produce a specific Lab combination how > can I build a profile? > how can I create values for AtoB0 BtoA0 and so on ? > thanks in advice > Marco > > ---------------------------------------------------------------------------- > -- > Lotusphere 2011 > Register now for Lotusphere 2011 and learn how > to connect the dots, take your collaborative environment > to the next level, and enter the era of Social Business. > http://p.sf.net/sfu/lotusphere-d2d > _______________________________________________ > Lcms-user mailing list > Lcm...@li... > https://lists.sourceforge.net/lists/listinfo/lcms-user > > > -------------------------------------------------------------------- > mail2web.com – What can On Demand Business Solutions do for you? > http://link.mail2web.com/Business/SharePoint > > > |
From: Stephen C. <st...@ju...> - 2010-12-21 19:03:29
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On 12/21/10 1:31 PM, Marco Bazzani wrote: > So LittleCMS is completely useless for this task ? It may not solve your problem but I would refrain from putting it as "useless." Some courtesy goes a long way. But it's just me. :) -- Stephen Chu <mailto:st...@ju...> <http://www.ju-ju.com> |
From: Marco B. <ma....@gm...> - 2010-12-21 20:15:42
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I wouldn't offend anyone, I ask the question in the wrong way, this is the right way: * Which advantages are there integrating data coming from ArgyII with LittleCMS? * Why LittleCMS can create icc profiles if it doesn't profile anything (it's not sarcastic I would know what can I do with an hPROFILE generated from scratch with lcms)? thanks in advice. On Tue, Dec 21, 2010 at 19:39, Stephen Chu <st...@ju...> wrote: > On 12/21/10 1:31 PM, Marco Bazzani wrote: >> So LittleCMS is completely useless for this task ? > > It may not solve your problem but I would refrain from putting it as > "useless." Some courtesy goes a long way. But it's just me. :) > > > -- > Stephen Chu > <mailto:st...@ju...> > <http://www.ju-ju.com> > > ------------------------------------------------------------------------------ > Forrester recently released a report on the Return on Investment (ROI) of > Google Apps. They found a 300% ROI, 38%-56% cost savings, and break-even > within 7 months. Over 3 million businesses have gone Google with Google Apps: > an online email calendar, and document program that's accessible from your > browser. Read the Forrester report: http://p.sf.net/sfu/googleapps-sfnew > _______________________________________________ > Lcms-user mailing list > Lcm...@li... > https://lists.sourceforge.net/lists/listinfo/lcms-user > |