Re: filmscanners: Image alignment/registration

["Michael Moore" <miguelmas@uswest.net>]

Shaf: I think that what the question intended is the same holy grail I am in
puruit of... that of being able to make TWO or more EXPOSURES at the time the
picture is created... in the camera... one shot for shadow, one for mid tones,
one for highlights, all without moving the camera... then making scans of each
exposure, and then combining these three in Photoshop... I have an article on
this technique that I have misplaced, but I know it is possible.. I have also
seen the section of Caponigro's book, which I highly recommend... and he
specifically takes you step by step through his creation of a long tonal range
color landscape of Death Valley.... so the question is... How do you
accurately register multiple scans of different negs of the same subject?

Mike Moore

shAf wrote:

> MCRich writes ...
>
> > The question:
> >
> > Will Apple¹s QuickTimeVR Authoring do this?   Any
> > alternative software?
>
>         I am totally ignorant of this software ...
> >
> > The problem:
> >
> > JPCaponigro suggests a "shoot twice scan twice" strategy
> > to capture both highlight and shadow detail of
> > long-dynamic-range subjects.
> > Imperfections of filmholders and scanner mounts mean
> > the two resulting Photoshop layers are imperfectly
> > aligned (registered).  ...
>
>         Understand that when you scan the 2nd time for shadow detail, your
> scanner software is only brightening (adjusting gamma, ... whatever it
> is you apply) your "raw" RGB scan data.  Although this is done with
> RGB depth native to the scanner (12bit?) and therefore precise, IF you
> also have the ability to transfer your native scan depth to Photoshop
> as a highbit file, then you can create your "brightened" shadow detail
> layer there.  Once both these are into your 8bit image as layers, you
> can "blend" to your heart's content, and both will be in perfect
> registration.
>
> shAf  :o)