[argyllcms] Re: colprof: Error - gamut: vector_isect failed! after several "nan"'s
- From: "S." <dewaaltje@xxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Tue, 11 Feb 2014 17:19:12 +0100
Op maandag 3 februari 2014 23:44:06 schreef Nikolay Pokhilchenko:
> 3 Feb. 2014, 18:54 +01:00 dewaaltje wrote:
> >I'm trying to create an icc profile for my Canon printer using a DTP20
> >device. In order to do that I followed to instruction in the "Typical
> >usage Scenarios and Examples" section on the Argyll website.
> >
> >The targets were obtained by issuing the following commands
> >* targen -v -G -d4 -l400 -f2160 -B16 -e16 -g128 Canon Which type of the
> >printer do you have? Are you using a RIP? Which one? Is your printer
> >capable to print separate C, M,Y and K channels? Or this is just an
> >"RGB-driven" printer?
> >
> >
> >If I then try to create an icc profile from the results using
> >* colprof -v -qh -i D50 -o 1931_2 -S AdobeRGB1998.icc -cmt -dpp Canon
> >
> >I get the following error:
>
> >colprof: Error - gamut: vector_isect failed! Have you tried simpler command
without gamut mapping:
> colprof -v Canon
> ?
>
> >Taking a closer look at the output of colprof, at several locations "-nan"
> >occur. This starts (I think) when the black point is determined because in
> >the output the first occurence is in the line
> >
> >Black point XYZ = -nan -nan -nan, Lab = -nan -nan -nan It seems like you've
> >tried to profile "RGB"-printer as CMYK printer.
Thanks for the response!
I'll first describe my systema bit more/better (sorry I did not do that in my
first mail)
My system consists of a PC running both Windows XP and Linux, a Canon Pixma
IP4300 printer, a Scanjet 8250 and a DSLR camera. Although the equipment for
sure is not the best available I'm attempting to get the best match between
colors on the various devices. To do that I'm using an i1Display2 for the
screen, an IT8.7/2 chart for the scanner and I'm trying to use an DTP20UV for
the printer.
I'm pretty new to the "color-stuff" and reading a lot to get to know more, but
even though I thought I read everything thoroughly your remarks made me review
and re-read everything again.
I think now your last remark was spot on, and I should have used "printerRGB"
in the targen line.
After doing that the errors disappeared. Thanks a lot!
I do have an extra question however: using Linux with CUPS it is possible to
set the color model to either RGB or CMYK. Is either RGB of CMYK to be
prefered for better results (maybe fewer conversions) or is this kind of trial
and error?
Regards,
Sander de Waal
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