On Sun, Apr 14, 2013 at 4:34 PM, Pascal Obry <[email protected]> wrote: > > As promised I'm reporting about this. And first the good news, I have > been able to print from GNU/Linux with quality equivalent to the prints > from Lightroom and the generic profile for my printer/paper. > > When I say equivalent I mean that it is impossible looking at the prints > from Lightroom/Windows and the one from GNU/Linux/EOG to see a > difference. My previous attempts on GNU/Linux without profile was > disastrous, so there is good progress! > > The bad news, I'll need a bit more time to write down the proper > procedure I have followed. > > Let me thanks Pascal de Bruijn again for the helps/hints about color > management.
No problem. I'm still working on solving part of this puzzle at Gutenprint's end... I've discovered that there are some non-linearities in the light to nonlight ink transitions: http://files.pcode.nl/temp/print/epson-r3000-8inks-nosmooth.png In the coming weeks I'll try to find better transition values... With enough patches, profiles will be able to compensate for this, but simpler profiles generated with only 200 patches or so seem to have difficulty in properly correcting for this. And then there's the basic color balance (yellow shift). Once I have something more definitive I'll keep you posted. In the end for best precision using a profile will still be best, but I'm trying to reduce the amount of correction done by the profile... Regards, Pascal de Bruijn ------------------------------------------------------------------------------ Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis & visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter _______________________________________________ darktable-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/darktable-devel
