RE: SilverFast (negafix)

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



I can't imagine why a chemical company would be less able to control the
color of the orange mask than to control the colors of the complex dyes that
make up the actual image. The orange mask would seem to be the easy part.
Sounds counterintuitive to me.

--

Ciao,               Paul D. DeRocco
Paul                mailto:pderocco@ix.netcom.com

> From: Scott Robertson
>
> Someone correct me if I'm wrong here, but I think you can't create a
> standard mask removal + characteristic curve (tone curve) correction for a
> given negative film due to the significant variability in the
> masking color
> from sample to sample.  Many factors can affect the exact color
> of the mask,
> like the emulsion lot, processing variability, even exposure differences
> among frames on a roll - not just the particular film type and speed.
> Whereas transparency film is pretty predictable in its color balance and
> tone curves and these characteristics can be measured and used to build a
> reliable standard profile (i.e. an ICC profile for the scanner + film),
> negative film does not have this property. You must sample the mask color
> for each frame, or at least each roll of film, in order to remove it and
> perform a decent reversal of the image. You cannot create an ICC
> profile for
> a scanner/negative film combination for this reason.

-
Turn off HTML mail features. Keep quoted material short. Use accurate
subject lines. http://www.leben.com/lists for list instructions.

[Index of Archives]     [Photos]     [Yosemite]     [Steve's Art]     [The Gimp]     [PhotoForum]     [Epson Inkjet]
  Powered by Linux