Hi, You could, alternatively, use the tifficc utility that comes with littlecms. If you can stay with TIFF, then tifficc is all you need.
For building tifficc, just use 'make utils' after a normal build. Tifficc is more limitated that IM in the way it only handles tiff, and it only deals with profile conversions, but it can effectively manage embedded profiles, almost any colorspace and has some "advanced features" for color management. AFAIK, many people is using tifficc in batch mode for bulk conversions. There is a similar utility for JPEG files, but be warned CMYK JPEG does have a fatal flaw, if generated by Adobe, C,M,Y components comes reversed (negative), also, CMYK behaves not so good when JPEG compression is applied Hope this helps, Mart� Maria The little cms project http://www.littlecms.com [EMAIL PROTECTED] ----- Original Message ----- From: "Scott Sandeman-Allen (RSCorp)" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Sunday, August 04, 2002 1:07 AM Subject: [Lcms-user] profiles, lcms & image magick > Hello all! > > I am trying to solve a problem with RGB to CMYK conversions using ICC > profiles liblcms and Image Magick. > > I know many problems can be injected by IM itself but I've tried so many > things I want to isolate the problem as best as possible. (BTW I'm > running IM under x86 Linux - Red Hat & Mandrake and have been compiling > V1.08 & 1.09 of lcms with 2.4.7-4 of IM) > > The problem manifests itself in that I get RGB images tagged with a CMYK > profile. This of course does not work very well. > > A sample command line I am using is as follows: > > convert srcImage.jpg +profile icm -profile rgb.icc \ > -profile cmyk.icc outputImage.tif > > This purges any existing profile, then tags the image with the source > profile and then the output profile. Unfortunately, as mentioned > earlier, the conversion is not taking place. > > I suspect one of my problems could be bad profiles and would like to > eliminate that as the cause of my problems. My theory of the moment is > that IM/liblcms is not recognising some aspect of the source or > destination profiles and is therefore not translating the iamge from one > colorspace to another. > > For testing, I downloaded the Adobe Photoshop profile package from the > Adobe website. I have several *legal* copies of Adobe's Photoshop (been > using it since it was called Barnescan XP in 1989) so have a few > iterations of profiles from Adobe laying about. I have also had > Macintosh computers for a long time on my network and have profiles > dating back to their first versions though they didn't add much to their > systems regarding print, it was all soft-proofing stuff. > > I have tried dozens of combinations of display, input, colorspace and > output profiles i.e. AdobeRGB1988.icc -> USWebUncoaded.icc without any > success. (shell scripting made this easier). I have also downloaded and > decompressed the profiles under Windows, Mac OS9 & Mac OSX as well as > decompressed them under Linux too. Apparently, the ICC spec is that all > data is stored big-endian so x-platform issues should be less of an > issue. > > Has anyone been able to successfully use profiles sourced from Adobe to > work with liblcms & Image Magick under Linux? > > Alternatively, I could be having a compilation problem, however when I > install pre-built binaries from Red Hat and Mandrake, I have not been > able to successfully process images either. > > Any thoughts or suggestions would be most welcome. I have tried so many > things that the frustration level is building and I'm running out of > time to get this to work. > > Scott > > > ------------------------------------------------------- > This sf.net email is sponsored by:ThinkGeek > Welcome to geek heaven. > http://thinkgeek.com/sf > _______________________________________________ > Lcms-user mailing list > [EMAIL PROTECTED] > https://lists.sourceforge.net/lists/listinfo/lcms-user > > ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf _______________________________________________ Lcms-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/lcms-user
