Le samedi 14 avril 2012 14:36:38 Gauthier Vandemoortele a ?crit :
> Le sam 14 avr, m. allan noah m'a ?crit:
> > Threshold is only for binary (lineart) images.
> >
> > allan
>
> Thanks for this 1rst explanation. But about gamma ?
>
> My problem is that the scan of dark photos leads to pictures where
> the loud keys are saturated (?bouch?s? in french); I can't retrieve
> the details by post-processing, so it's essential to collect
> lighter values during the acquisition.
Hello,
xscanimage has an interactive gamma curve editor that is worth trying
in
your case. You must note that gamma correction only works with a 8 bits depth,
not in 16 bits per color (it's an hardware limit).
Regards,
Stef
