Louis,
This is most helpful information. I did not know there was a standard for
characterizing the dynamic range of a scanner -- manufacturers beware!
Thank's Bertho too. I looked at your notes but I don't have any explanations
to offer but the ones you came up with. I agree that it is more than the
sheer ability of discrimate among dark tones but the ability of
*simultaneously* discrimate among both dark and light tones in an original
or a natural scene we're after.
Kudo to you both.
> I think you should take a look at the following URL:
>
> http://digitalkamera.image-engineering.de/article.php/DynamicRangeSoftware
>
> Software for ISO 21550 Dynamic range mesurements
> "The package includes a Photoshop plugin for the analysis of the test chart,
> an excel spreadsheet to do the final calculation and a Powerpoint presentation
> as a user manual created by Justin Tehrani from HP."
>
> Hope this help!
>
> v.p. Nouvelles Technologies / New Technologies
> TGLC inc.
> Color Management software
> www.tglc.com
> email@hidden
> 418-877-9114
Roger Breton | Laval, Canada | email@hidden
http://pages.infinit.net/graxx
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