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Infrared Dust Removal

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Infrared Dust Removal Carl Brown 27 Nov 16:38
  Infrared Dust Removal GSR - FR 27 Nov 17:12
Carl Brown
2004-11-27 16:38:13 UTC (over 19 years ago)

Infrared Dust Removal

Some film scanners, Nikon et al, feature an infrared channel which identifies dust on the film, so it can be removed by software. One way to start to do this is to use the IR channel as a layer mask on the image, leaving transparency in place of the dust spots.

The second part of the process would be to synthesize pixels to fill the holes in the image, by the interpolation of the color values of surrounding pixels to create a seamless blending across each hole. A google search turned up one mention of such a "Fill Holes" filter, but not the filter itself or any useful clues to its whereabouts or continued existence. panda.mostang.com/pipermail/ sane-devel/2003-May/007657.html

Does such a filter still exist for the GIMP, and if so, where is it found?

GSR - FR
2004-11-27 17:12:44 UTC (over 19 years ago)

Infrared Dust Removal

cbsled@verizon.net (2004-11-27 at 1038.13 -0500):

The second part of the process would be to synthesize pixels to fill the holes in the image, by the interpolation of the color values of surrounding pixels to create a seamless blending across each hole. A google search turned up one mention of such a "Fill Holes" filter, but not the filter itself or any useful clues to its whereabouts or continued existence. panda.mostang.com/pipermail/sane-devel/2003-May/007657.html

Search for the author name or the words that compose his email.

You could look at inpainting techniques, there is a lib but no Gimp plugin at http://cimg.sourceforge.net/. BTW, that same lib could be used to remove grain, another common task while scanning.

Does such a filter still exist for the GIMP, and if so, where is it found?

Brute force ones mostly, like Intelligum or the one mentioned above.

GSR