Re: filmscanners: VueScan 6.6 Available

["Robert Kehl" <bobkehl@kvernkehl.com>]

Ed.

I don't want you to reveal your secrets, but you say you have a better way
to accomplish both dust removal and grain reduction.  Speaking purely of the
results, not necessarily the process, how is it better?

Thanks,

Bob Kehl

----- Original Message -----
From: <EdHamrick@aol.com>
To: <filmscanners@halftone.co.uk>
Sent: Wednesday, January 31, 2001 11:04 AM
Subject: Re: filmscanners: VueScan 6.6 Available


> In a message dated 1/31/2001 9:59:13 AM EST, bobkehl@kvernkehl.com writes:
>
> > Please tell us more about the difference between your spot removal vs.
ICE.
> >
> >  And what are you saying about reduction of film grain??!!  Now that
you've
> >  conquered Digital Ice's spot removal are you also improving on ASF's
film
> >  grain equalization ?
>
> I'd rather not go into the details of what I did, but I was careful not
> to violate any of ASF's patents.  In avoiding their patents, I was able
> to come up with a much better way of doing infrared dust removal
> (what ASF calls ICE) and grain reduction (what ASF calls GEM).
> Both are combined in the "Options|Clean" option.
>
> The key insight came when I learned about Sigma filters.  I was
> amazed at how well the final algorithm worked.  I can probably
> tweak it some more, but it works quite well now.  I'd recommend
> using the "Clean" setting instead of "Scrub" or "Scour" since
> it seems to work well and is quite fast.
>
> Regards,
> Ed Hamrick
>