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Re: filmscanners: This Gamma Thing...?



Tony, for us users of Vuescan on a Mac scanning for output to an Epson
Printer, would 1.8 be good gamma starting point?  Vuescan defaults to 2.2,
I'm guessing because most users are on Windows.

STEPHEN    JENNINGS
    P h o t o g r a p h e r
       Cambridge, MA
sgjennin@ix.netcom.com

> To be more practical, Macs use a system gamma of 1.8 and are historically the
> de facto standard in imaging. Therefore 1.8 is a 'good value' if you are
> working with designers who will be using Macs. However Windows machines are
> much more numerous. If you are aiming at cross-platform medium such as the
> WWW, 
> 2.2 is probably a safer assumption.
> 
> There's some stuff on my site about all this, and it's well worth reading Prof
> Charles Poynton's FAQ about Gamma (link at my site). But don't be too taken in
> by it - he is talking only about video systems and optimal presentation. We
> tend to have to worry about data precision as well, through iterations of
> editing operations.
> 
> Regards 
> 
> Tony Sleep
> http://www.halftone.co.uk - Online portfolio & exhibit; + film scanner info &
> comparisons




 




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