Re: Scanner Profiling Issue
Re: Scanner Profiling Issue
- Subject: Re: Scanner Profiling Issue
- From: John Castronovo via colorsync-users <email@hidden>
- Date: Fri, 15 May 2020 10:13:36 -0400
- Importance: Normal
An embedded profile cannot change the values. They are what they are unless
a profile interprets them differently. What you need to be concerned about
is the stability of the scans. If they vary depending upon content or for
any other reason, you can't profile that scanner. The other thing that could
be raising your numbers is optical flare and that will certainly cause
issues. Make sure everything in the optical path is clean.
John C.
Techphoto, llc
-----Original Message-----
From: Chase via colorsync-users
Sent: Wednesday, May 13, 2020 6:58 PM
To: email@hidden ; Pat Herold Chromix
Subject: Scanner Profiling Issue
Hi,
I've been trained to profile digital devices by (after calibration) first
turning off all color management meaning no profile application to the
output, making a "raw" output and opening it in a profiling application to
make an ICC input profile.
I'm running into a problem trying to profile a scanner whose software
interface will not allow you to turn off the color management on any scan. I
was told by the manufacturer to just discard the embedded profile (in
Photoshop) prior to creating and opening the now supposed "raw" scan used to
make a profile in Xrite or other applications.
When tested in Photoshop, the supplied initial embedded profile supplied and
recommended to use during profiling by the manufacturer raised all the "L"
values about seven "L" so it did change the "raw" values of the scanner for
every scan. To my mind, if a "raw" scan is not truly "raw," it will not
profile correctly. Testing the resulting new input profile had problems with
tone values, gray and color hues.
Therefore, their assumption of just discarding a profile in Photoshop will
not create a truly "raw scan?" I have not seen it. Any ideas? Is there any
way I can traditionally profile this type of scanner? That is the problem I
am trying to solve.
Thanks for your opinion,
Randy ZauchaManaged Color
_______________________________________________
Do not post admin requests to the list. They will be ignored.
colorsync-users mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden
_______________________________________________
Do not post admin requests to the list. They will be ignored.
colorsync-users mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden