...original art pigments along with the 1Ds Mark II sensor...
...original art pigments along with the 1Ds Mark II sensor...
- Subject: ...original art pigments along with the 1Ds Mark II sensor...
- From: Tim Vitale <email@hidden>
- Date: Thu, 10 May 2012 10:22:22 -0700
- Importance: Normal
I meant to say examine the color issues at the highest [screen]
magnification/resolution, just before the image pixilates, in Photoshop and
look at the juxtaposition of particles/canvas weave to see if they have a
specific aliasing of color separation. Or, just what the hell is going on,
here?
I have just assumed the problem passage was sand colored.
If the region is red or blue/purple it could be the PCS [profile connection
space]. I'm always fighting the color changes introduced as the colors in
the image go through **correction** in the profile. Most output profiles go
through Lab PCS, not the more linear XYZ PCS used for monitor profiling.
Bruce Lindbloom has an excellent explanation of this issue. See
http://www.brucelindbloom.com/index.html?UPLab.html. Make sure you use the
Munsell Display Calculator
http://www.brucelindbloom.com/index.html?MunsellCalculator.html. In the
Java MDC, set -- Model: Lab; Show: Radials; Select [sliders]: Hue 7.5PB,
Value: 2, Chroma: 6. You will see the issue. Now move the Hue slider. The
radials are not straight for certain colors, thus , blue/purple turns purple
when it goes through the PCS, as does, red shift to orange. It happens
often enough that I question the use of input profiles. I have certainly
tried to use Lindbloom helper profile. ArgillCMS is the only tool that
respects helper profiles, but it is just too basic for me, AS GOOD AS IT IS.
How does the thing look if you print **without** a camera profile, just to
see if it is the profile.
My gut says UV and polarization are not the issue, if you have already
varied the lighting positions and polarization angle.
I sent you to Mike Collette because the scanning back is the *only way* to
capture art correctly. The new 46 MP Foevon SD1 Merrill maybe workable as
well.
I have to talk with someone using the SD1 Merrill. [Please CALL ME, TX.]
Tim Vitale
Paper & Photography Conservation
Oriental Scrolls & Screens in the Western Manner
Digital Facsimiles & Digital Image Restoration
Remastering still Film to Digital [distorted too]
Archive & Collection Surveys
Video & Film Preservation Surveys
Preservation & Imaging Consulting
Vitale Art Conservation
2407 Telegraph Avenue #312
Oakland, CA 94612
510-594-8277
510-508-4162 cell
510-891-1602 fax
email@hidden
Website: http://vitaleartconservation.com/
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Video Preservation: http://videopreservation.conservation-us.org/ (2007)
Albumen Photography website: http://albumen.conservation-us.org/ (2001)
Brief History of Imaging Tech: http://vitaleartconservation.com/bhit.pdf
-----Original Message-----
From: Millers' Photography L.L.C. [mailto:email@hidden]
Sent: Wednesday, May 09, 2012 5:31 PM
To: email@hidden
Subject: I suspect the original art pigments along with the 1Ds Mark
IIsensor is part of the issue. What do you think?
Tim
What is meant by
very highest resolution in PS?
I will do the exercise of removing the polarizing filter. Also, put the
image softly out of focus.
I have a UV / IR filter arriving Friday. Let's see if this make a
difference.
I don't follow you with this sentence: ICC profiles can't solve
everything, and actually cause many problem, generally they cause fewer
problems than they correct.
I custom create all my own profiles. Does that make a difference in your
opinion?
David B. Miller, Pharm. D. member
Millers' Photography L.L.C.
3809 Alabama Street
Bellingham, WA 98226
360 739 2826
email@hidden
Sent from my MacBook Pro
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