Re: -Dirt- yellows in CMY profiles / long /
Re: -Dirt- yellows in CMY profiles / long /
- Subject: Re: -Dirt- yellows in CMY profiles / long /
- From: "Adriano Von Markendorf" <email@hidden>
- Date: Tue, 22 Oct 2002 09:51:14 -0200
>
Hi Adriano,
>
>
Until you find a PostScript RIP like BEST to drive your EPSONs, it will be
>
hard to see if you can improve on the yellow. I have a BESTcolor RIP here
>
and it would be interesting to compare the yellows we get. We just have to
>
think of an experiment and use some common EPSON paper, like EPSON Photo
>
glossy paper. I could use StylusRIP and compare with the color I get when
I
>
use BESTcolor to drive the 3000. That would tell us for sure.
Hi Roger !
My problem is worse. I Must to profiling the printer with the CMY/RGB latest
driver.
I think that will be nice if the profiling softhouses leave a tech note
about.
>
A quick way also is to look at your profile with Chromix ColorThink. Take
>
the two profiles you use to transform the color. You should see very
>
clearly, in the 3D gamut plotter, where the yellow in your source is
>
different from the yellow in the EPSON profile.
I go to my Lab and will try:-)
>
What is difficult is understanding where each yellow is, presently, in
each
>
profile before the transformation. Ideally, you would want to compute the
>
delta E between the two yellows. And also understand why the resulting
>
yellow is dirty. Is it because the output profile is trying to preserve
the
>
Source Hue angle but it has to use a lower Lightness and Chroma value in
>
order to do so?
I must to think hard about this. I will give a look and will back.
>
You need some graphic and numeric tools to analyse this relationship. But
>
that still wont't tell you how to correct it, in profile editing. It may
>
tell you, however, that no amout of profile editing will ever fix the
>
problem.
I really don't like to know that.... peharps a honor way out is to try until
to die? <g>
I'm wondering if I could to change the yellows in the target (before
printout) to look close to my first try and read again with an original
"dirt" yellow in the printout.
So, putting the dirt, before I read with my spectro, maybe clean the yellows
for profiling.
Maybe this a Dr.Spock logician exercise?
Thank you for your deeply post.
Surely,
Adriano von Markendorf email@hidden
"I-C-Cm vitamin's inside" Rio de Janeiro - Brazil
_______________________________________________
colorsync-users mailing list | email@hidden
Help/Unsubscribe/Archives:
http://www.lists.apple.com/mailman/listinfo/colorsync-users
Do not post admin requests to the list. They will be ignored.