[argyllcms] Re: cmyk printer profiles
- From: Vladimir Gajic <vgajic67@xxxxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Thu, 25 Mar 2010 19:13:53 +0100
Hi Graeme,
after converting an RGB-image (roman16) from eciRGB_v2 or AdobeRGB to my
fogra39 profile, magenta and cyan primaries appear far to dirty. Here are
some values:
eciRGB (Photoshop)
Cyan: 61/138/194 -> 83/10/5/32
Magenta: 174/59/134 -> 0/85/9/29
That´s at least 10-15% too much black in both colours. Since the transition
is very smooth, I really don´t have any problem correcting them. Anyway, my
profile params are:
-l330 -L95 -kp 0.00 0.18 0.98 0.95 0.55 -al -s AdobeRGB -np -tp -dpp
I do use the FOGRA39L.TXT as reference.
Basically I don´t see a big problem in this behavior since the overall
separation-quality of my profile is quite better than what I now from
commercial profiling solutions. My question is more to be understood in the
typical beginner terms.
Regards
Vladimir
2010/3/25 Graeme Gill <graeme@xxxxxxxxxxxxx>
> Vladimir Gajic wrote:
>
>> Adobe RGB issues the best results. Finally my question: Is there a way of
>> improving the gamut-mapping, especially in cyan and magenta? I use the
>> roman16 images for my tests.
>>
>
> I guess it's not exactly clear in what way you find the gamut mapping a
> problem.
>
> Can you provide examples ? e.g. if you are using the Fogra39 data set,
> the colprof options you are using, and the cyan and magenta values
> you get after transforming from AdobeRGB though to CMYK using (say)
> icclu and/or Photoshop.
>
> Graeme Gill.
>
>
Other related posts:
