Datacolor User to User Support Group.

--- In colorvision_group@yahoogroups.com, David Miller <dm2363@...> wrote:
>
> >I don't know if this is the right place to post by problem, but
here goes:
> >
> >I'm reviewing the PFP Suite during it's 30 day trail and am doing the
> >same with PhotoShop CS 2.
> >
> >Long story short: Calibrated my monitor with Spypro2 and calibrated my
> >Canon i9900 with building a 225 patch to HP Preium Photo Paper.
> >
> >I'm doing a 4x6 print taken from Kodak LS400 (4 magepix digital
> >camera) of myself with my grandson.
> >
> >For some reason I cannot identify why the print comes out with a green
> >color on what should be a Reddiseh/Auburn color (my beard,hair & my
> >grandson hair). My and my grandson's skin tone appears correct.
> >
> >This green doesn't appear in the Photoshop preview window. But the
> >green is being printed out.
> >
> >I'm using the following settings in Photoshop CS2:
> >*The pic original profile is sRGB
> >*Options: Color Handling: "Let Photoshop Determine Colors"
> >*Printer Profile: (profile name I built using PFP)
> >*Rendering Intent: Perceptual
> >*Unchecked "Black Point Compensation"
> >
> >The printer's settings are the same as I used while building a profile.
> >
> >I've tried everything I can think of from converting the pic "Color
> >Management" in Photosho Editing from sRGB to Adobe RGB.
> >
> >Can anyone give me suggestions?
> >
> 
> Rocky,
> 
> It looks to me like you're seeing good results everywhere but in the
> shadows with the profile you built.
> 
> Looking at your measurements: at first glance, they seem fine.
Everything
> seems as it should in the main groups of 5x5 evenly spaced RGB colors
> (the first 5 rows, and the first two groups in the middle row).
> 
> But where I'm seeing some subtle things that might not "fit" with
the rest
> are in the shadow measurements, in the 11 A-E through 15 A-E group.
There
> are some "interesting" shifts in color in some of the patches that a) if
> printed and measured correctly, may be hard to profile with only 225
patches,
> or b) may not be measuring correctly.
> 
> To confirm this, I built a profile, looked at in ColorThink, and I can
> see some "twisting" going on in the shadows, in the tail of the profile
> gamut shape. (Also apparent is that black is pretty far off neutral).
> 
> This isn't the kind of "crunched" or "dented" profile shape that's a
good
> indication of bad things in the measurements (we had an example like
this
> a few weeks ago, where one incorrectly measured row in a 729 patch
target
> caused a big problem), but this is still a sign that something's off.
> 
> Suggestions:
> 
> - I think you're going to want to profile this with 729 patches
rather than
> 225, so first thing to do is print out the 3 page, 729 patch target
and let
> it start drying.
> 
> - In the meantime: go back and try remeasuring the patches in 11 A-E
through
> 15 A-E. I would switch the Target window display from Split to Measured,
> then watch carefully as you remeasure patches, 12B and 13B in
particular.
> Does remeasuring change anything, or do the new measurements look
like the
> old?
> 
> 
> Best regards,
>


Dave,
I just finished reading the 729 patches.

The difference between the 225 & 729 are very, subtle. I still have
the green cast though?

Have you any suggestions?

Perhaps I'll try the slider bar option giving at the end of measuring
color charts.

Which color and what direction do you suggest?