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[filmscanners] RE: Density vs Dynamic range>AUSTIN (2a)



Guys, don't get me wrong, there is no point to be rude of offensive, but
this thread became really annoying and disturbing taking about 90% of the
whole traffic on the List.
I think every one on the List got really impressed by your knowledge in
electronics and related fields, but it would be certainly appreciable of you
would continue your debates on this topic on
some electronics-related Lists. The theme went way out a while ago of the
scanning and photography
topics this List was originally intended for.

I'm EE engineer myself, but joining the List I hoped to get involved in
wonderful world of image scanning, processing and photography, leaving
professional issues for appropriate discussion carriers.

Regards,
Alex Z

-----Original Message-----
From: filmscanners_owner@halftone.co.uk
[mailto:filmscanners_owner@halftone.co.uk]On Behalf Of Anthony Atkielski
Sent: Wednesday, June 19, 2002 2:17 AM
To: alexz@zoran.co.il
Subject: [filmscanners] Re: Density vs Dynamic range>AUSTIN (2a)


Austin writes:

> Yes.  As far as film scanners go.

Look at the word "scan," and tell me if you see anything in the meaning of
this word that might be incompatible with the notion of zero change.

> Yes, but has nothing to do with the electronics
> of a film scanner.

The electronics of a film scanner handle information, and so the
implications of information theory apply to scanner electronics.

> Scanners are purely static devices.

Then how do they SCAN?

> The data that is captured has NO time
> property at all.

The data changes in the spatial domain, not the temporal domain, as I have
explained several times.

> Nothing changes because you scan faster
> or slower, given you are above the exposure
> and settling time of the mechanism.

Unless you have scanned a gray card, every pixel changes from every other.

> I really don't know what you are trying to
> get at here, Anthony.

So I surmised quite some time ago.  But I do wish to make the concept clear
to others who might see it with sufficient explanation.

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