Re: Dynamic Range testing
Re: Dynamic Range testing
- Subject: Re: Dynamic Range testing
- From: neil snape <email@hidden>
- Date: Tue, 04 May 2004 21:45:54 +0200
on 04/05/2004 21:18, Douglas Rhiner wrote :
>
I wish to test the Dynamic Range of my two scanners, a TANGO and an
>
LS-8000.
>
What do I need to accomplish this? I.e. what target would I scan?
>
How should the scanner be set up for the test?
>
Any procedural aspects to look for so I get a "true" reading?
If you want raw data off the Tango and you're scanning in Linocolor , you'll
need to save out a calscan. This is rgb data. Lincolor converts the the data
on the fly (now there's a funny term*) dynamically from the base densities
found in the film to a mapping into an ICC Lab space with a reduced a* and
b* boundaries. The only way you'd exploit the max density within the ICC Lab
workflow would be to use a very good chart namely the HCT Don Hutchinson
chart with an extended dynamic range. You could find a valuable resource on
hutchcolor.com on how to add a neutral Dmax sample point to overcome the
limitations of the maximum density inherent on a classic IT8 7/1
Neil Snape nsnape @ noos.fr neil_snape @ mac.com
http://mapage.noos.fr/nsnape
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