[filmscanners] RE: Scanner Profiling

["LAURIE SOLOMON" <laurie@advancenet.net>]

I think that one should also add that there are also variations in the color
and density of the masks from one film brand to another as well as possibly
between film types within the same brand.

-----Original Message-----
From: filmscanners_owner@halftone.co.uk
[mailto:filmscanners_owner@halftone.co.uk]On Behalf Of Doug Franklin
Sent: Tuesday, July 15, 2003 9:26 PM
To: laurie@advancenet.net
Subject: [filmscanners] Re: Scanner Profiling


On Tue, 15 Jul 2003 21:00:04 -0230, michael shaffer wrote:

> What difference does it make if the film is negative or positive?
> All the scanner understands, and scans, is color ... the rest of
> it is in software.

Because the positives (slides) don't have a mask layer, and they all
come out to colors that are directly viewable (perceivable), and they
all come out in the same color space: that of the human eye.  Negative
films, however, do not.  The (orange) mask layer is different from film
to film, and must be subtracted out before the "mechanical" color
inversion takes place.

TTYL, DougF KG4LMZ


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