[filmscanners] Re: Digital ICE

["Arthur Entlich" <artistic-1@shaw.ca>]

I'm sure Jack Phillips can give much more info on this, since his
company created dICE and licenses it.  Also, as I understand it, there
is more than one version of dICE, and the newer version has apparently
been improved upon over the original.

As I understand it, dICE uses some type of mathematical formulation to
look at the information around the edges of the defect area, and
interpolates it.  This, of course, means the "fill in" is an
approximation of the real info under the defect.  It might also explain
why some images become somewhat softer from dICE if there is a lot of
damage, dirt or dust.

The Polaroid scanners do not currently have a dust removal scheme built
in.  But, their lighting method reduces the capture of both grain and
defects.  As I mention in my previous posting, some new software methods
are being tested to see if they can be effective with minimal degrading
of the image otherwise. David Hemmingway might be able to add as to if
there is anything in the works in terms of producing or licensing
something like dICE or FARE.

Art

argv@danheller.com wrote:

>>Date: Mon, 04 Feb 2002 17:54:56 -0800
>>From: Arthur Entlich <artistic-1@shaw.ca>
>>----------------------------------------
>>Digital ICE is an infrared scan that "sees" materials opaque to Infrared
>>light.  This includes dust, dirt and some types of surface damages,
>>which lower the frequency of the light during transmission.
>>
>
> Two questions: what does it replace the pixels that the dust is covering
> up? does it attempt to fill in those "holes" that would otherwise be
> created by the particles with a color of some sort? if so, which colors?
> does it copy adjacent pixels? can anyone be more specific about how this
> works?
>
> Also, what are the drawbacks to ICE (in a nutshell). I remember when
> photoshop came out with it's dust and scratches filter, everyone oo'ed
> and ah'ed about how great it was, but it turns out that it blurs your
> image pretty badly to the point where it's not really useful in a
> practical sense. (You still have to use the clone tool to maintain a
> consistency in the pixels.)
>
> Lastly, does the polaroid 120 have ICE and if not, does the new SS4000+
> have it? If not, when will their line of products have it?
>
>
> --
>       --dan
>


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