Re: Pre-color-management scans legacy (Paul Schilliger)
Re: Pre-color-management scans legacy (Paul Schilliger)
- Subject: Re: Pre-color-management scans legacy (Paul Schilliger)
- From: Paul Schilliger <email@hidden>
- Date: Mon, 07 Jan 2002 15:17:25 +0100
>
I think best method is to get a good scanner profile and try
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assigning that. Check the appearance on a calibrated screen.
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try opening a few scans and assigning Ektaspace in PS 6. how do
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they look?
Neil, none of the scanner profiles used gave good results, but that's
normal for I did not scan using them in fact, but rather used the built
in default table. And from the wide gamut profiles that I have tried
(Ektaspace RGB, Don and Best RGB, Adobe RGB), Adobe RGB is near perfect,
practically no change on screen when applied. All the other ones had
over saturated colors. Since Adobe RGB is a large gamut profile, I
believe that if the scans match with it, they should be good enough and
should edit neatly in that profile. I have made some recent scans in
Best RGB, a slightly wider gamut, I think. This time they are produced
with the scanner custom profile and exported tagged in Best RGB. The
scans are for different uses, but ultimately for Lambda laser prints. If
some of you have any comment on my profile choice or if it would be
better to use another profile (Adobe, Ektaspace), your comments are
welcome!
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Since you have profiled the system - can you compare the custom profile
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to the canned ref/trans profile? Can you scan the same image twice,
with
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the same fixed endpoints etc, with two different input profiles (one
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cannned, one custom). I am just interested in how close the
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canned/custom profiles are on the Jazz model, as I can't make this
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little test on the Supreme. This is not important, I'm just curious.
Stephen, I have sent you some scans made using different profiles. I am
not using the Jazz, but the plain Eversmart (same as Pro but slower and
with limited workflow, no access to preview while scanning and.. not
supporting 16 bits scanning, only 14). The custom profile produced a
good image, the snow is neutral and reflects the colors of the slide.
The canned Eversmart Supreme profile was not bad, but some shades of
light gray have a pink cast with my scanner. An older profile called Pro
II is really not good on my scanner. I can say that for me, the custom
profile is really worth it with ICC workflow. The most difficult colors
are almost perfect on screen in raw scan. It was not so before! Maybe
the Supreme is furnished with a good match and does not need a custom.
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And as for having issues with your original workspace RGB files
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converting to WWW images in sRGB - as mentioned before, this seems
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weird. Can you crop out a section of the original that has bad colour
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shifts, tag it, and save it for me to play with? Are you using
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perceptual rendering in the transform from WS RGB to sRGB? Is BPC being
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used in the transform?
This is driving me crazy. It seems to me that the same action produces a
different result when it is applied the next day. I have tried Best to
sRGB and perceptual not long ago and it was good, now not any more. Two
days ago I got good match when I tried converting to Apple RGB, but not
today. Maybe there is something wrong in my system folder. A profile
that works well one day but produces strange colors the next day makes
me think so. Which engine is the best for profile conversions? Is
perceptual always the best? And what setting for BPC is right?
>
When I launch the EversmartScan 3.1 application, it disables my monitor
calibration (OptiCal). I have then to switch it back manually. What's
the reason for that?
Still puzzles me. I have to launch the OptiCal calibration software
control panel after it has been disabled by EversmartScan to have it
active again. I have checked all preferences in Optical and Eversmart
but could not find this option. I had addressed the question in the Scan
Hi-End forum. Maybe I should address this question to Bryan at ColorCal.
Thanks to All, for your kind help!
Paul
email@hidden