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


  • To: lexa@lexa.ru
  • Subject: [filmscanners] Re: Density vs Dynamic range>AUSTIN (2a)
  • From: "Isidoro Orabona" <isiora02@hotmail.com>
  • Date: Wed, 19 Jun 2002 15:40:01 +0200
  • Unsubscribe: mailto:listserver@halftone.co.uk

Alex,

I agree.

Ciao,
Isidoro

>From: "Alex Zabrovsky" <alexz@zoran.co.il>
>Reply-To: filmscanners@halftone.co.uk
>To: isiora02@hotmail.com
>Subject: [filmscanners] RE: Density vs Dynamic range>AUSTIN (2a)
>Date: Wed, 19 Jun 2002 13:12:13 +0200
>
>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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