Hi, >echo 10 90 0 10 | icctrans -i"CoatedFOGRA39.icc" -o*Lab -n > >LittleCMS ColorSpace conversion calculator - v3.3 > >47.4525 63.8438 -7.7734
This is exactly what PhotoShop CC 2015 gives >echo 0 100 0 0 | icctrans -i"CoatedFOGRA39.icc" -o*sRGB -n > >LittleCMS ColorSpace conversion calculator - v3.3 > >229.56 0.00 125.60 Again, exact match after proper rounding. I don't see what is wrong in those calculations. >This is all VERY different to all other calculations I have seem for example I would think RGB would be closer to 255 0 255 Please remember this is precision color management, so if you compare with online converters that are applying CMYK=1-RGB or things like that, results are obviously different. But it is not Adobe or Littlecms who is wrong. RGB 255, 0, 255 is on gamut boundary which effectively is out of gamut. I doubt any decent CMM will give 255, 0, 255, this is not in the ICC profile. Regards Marti Maria The LittleCMS project http://www.littlecms.com -----Original Message----- From: Harald Weinhandl [mailto:hvo...@gmail.com] Sent: martes, 7 de junio de 2016 5:58 To: lcms-user@lists.sourceforge.net Subject: [Lcms-user] CMYK to CieLab Hi I have been trying all day to convert CMYK to Lab using the basic. hTransform = cmsCreateTransform( hCMYKProfile, TYPE_CMYK_DBL, hLab, TYPE_Lab_DBL, INTENT_PERCEPTUAL, 0); I have also tried icctrans which gives the same results echo 10 90 0 10 | icctrans -i"CoatedFOGRA39.icc" -o*Lab -n LittleCMS ColorSpace conversion calculator - v3.3 47.4525 63.8438 -7.7734 If I also just use a simple CMYK to RGB echo 0 100 0 0 | icctrans -i"CoatedFOGRA39.icc" -o*sRGB -n LittleCMS ColorSpace conversion calculator - v3.3 229.56 0.00 125.60 This is all VERY different to all other calculations I have seem for example I would think RGB would be closer to 255 0 255 also checking many online converters Am I doing something very wrong, I have tried other CMYK profiles like USWebCoatedSWOP and they are nearly the same.. Harald ---------------------------------------------------------------------------- -- What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic patterns at an interface-level. Reveals which users, apps, and protocols are consuming the most bandwidth. Provides multi-vendor support for NetFlow, J-Flow, sFlow and other flows. Make informed decisions using capacity planning reports. https://ad.doubleclick.net/ddm/clk/305295220;132659582;e _______________________________________________ Lcms-user mailing list Lcms-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lcms-user ------------------------------------------------------------------------------ What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic patterns at an interface-level. Reveals which users, apps, and protocols are consuming the most bandwidth. Provides multi-vendor support for NetFlow, J-Flow, sFlow and other flows. Make informed decisions using capacity planning reports. https://ad.doubleclick.net/ddm/clk/305295220;132659582;e _______________________________________________ Lcms-user mailing list Lcms-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lcms-user
