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Re: filmscanners: =?iso-8859-1?Q?Re=3A=20autolevels=20was=20re=3A=20filmscanners=3



On Thu, 26 Jul 2001 16:43:08 +1000  =?iso-8859-1?Q?Rob=20Geraghty?= 
(harper@wordweb.com) wrote:

> If so, why is a point of sun reflection in a photograph not a good
> point to use for the white point?  Because it's not representative of the
> majority of the image?

Yes, it is massively out of step with the brightness range of the rest of 
the image. If you set it as a white point, the rest of the histogram will 
likely be scrunched up to the left - better to clip the specular highlight 
and adjust for the rest. Or selectively mask and separately adjust two 
layers then recombine, if you want to keep some detail in the specular 
highlights.

Regards 

Tony Sleep
http://www.halftone.co.uk - Online portfolio & exhibit; + film scanner info 
& comparisons




 




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