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[filmscanners] RE: Digital ICE

  • To: lexa@www.lexa.ru
  • Subject: [filmscanners] RE: Digital ICE
  • From: "Jack Phipps" <JPhipps@asf.com>
  • Date: Thu, 7 Feb 2002 11:09:09 -0600
  • Unsubscribe: mailto:listserver@halftone.co.uk

Hi Clive! Thanks for your interest. I started on Bob Shomler's request for
patent information first. I went to the Delphi site:

and found this description:

Surface defects in a reflection scan of a print made with visible light are
corrected by using a scan of the print made with infrared light. This
correction of surface defects is performed by controlling the intensity of
defect detail in the infrared record by multiplying that defect detail by a
gain. The gain varies for each region of the image as a function of the
brightness of the image in that region. The gain approaches unity for white
areas of the image, drops toward zero for darker areas, and approaches a
small negative number for black areas of the image. The gain-multiplied
defect detail is then subtracted from the visible image to create the
corrected image free of the surface defects.

Please check out the site for additional description. I probably wasn't very
accurate when I described it as "looks through". I hope  this description is

Good luck scanning!

Jack Phipps
Applied Science Fiction

-----Original Message-----
From: Clive Moss [mailto:clivemoss@hotmail.com]
Sent: Wednesday, February 06, 2002 8:17 PM
To: Jack Phipps
Subject: [filmscanners] RE: Digital ICE

>Digital ICE is unique (and patent protected)
> in that it "looks through" the surface defects and identifies
> the underlying information in the film.

Not sure I understand this. If the defect is, say, a speck of a
substance (talc, eg) that cannot be penetrated by anything the scanner
can throw at it, would you not get the same result as a hole in the
film, if you do not interpolate?

Clive Moss

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