On Tue, 29 Jan 2002 22:33:19 -0800 Ken Durling (kdurling@earthlink.net)
wrote:
> However, nothing I do in Vuescan results in anything but a straight
> greyscal image, leading me to believe that there's something I don't
> understand about this film (no surprise). So where does the sepia
> toning come from?
It arises purely out of the filtration used by the lab for C41 printing,
and is not a property of the film itself, just a workaround for the fact
that it's difficult to get a neutral greyscale print on colour paper with
this film.
You can achieve sepia, or much fancier split-tone effects in any colours
you want, within Photoshop or similar, starting from any greyscale image.
There's even a default action supplied for sepia 'toning', or you can
convert to RGB and mess about with relative densities of each of the
channels via curves.
Regards
Tony Sleep
- Online portfolio & exhibit; + film scanner info
& comparisons
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