Re: filmscanners: Vuescan - A few technical questions

[Hersch Nitikman <hersch@silcom.com>]

Very interesting, Ed. How does the program know how much fading there was, 
vs just a difference in what was in front of the camera lens?

At 03:45 AM 03/05/2001 -0500, you wrote:
>In a message dated 3/4/2001 8:39:50 PM EST, ironworks@ameritech.net writes:
>
> > Is the scan in Vuescan's memory the same as the "raw scan"?
>
>Yes.
>
> >  And do any of the settings on the Color Tab or the Media tab affect the
>scan
> >  in memory and/or the raw scan?
>
>No.
>
> >  Finally, if you know (or if it's not a trade secret for Ed), what type of
> >  color modification is made by the "Restore Color" option?  I scanned a 
> Q-60
> >  without it and the colors were off - Blue was about 10 points too low.
>With
> >  the Restore Color option checked the result was fairly accurate.
>
>The restore color option does three things (not in this order):
>
>1) adjusts the gamma of the three colors to adjust for film fading
>    or sensor nonlinearity
>2) adjusts the colors with a 3x3 matrix
>3) adjusts for white balance
>
>Regards,
>Ed Hamrick