On Wed, January 7, 2009 14:24, Rene Hales wrote: > I also think digital ice > does not really work well on b&w negatives. Indeed, it does not; not on conventional silver-gelatin materials. ICE works by doing a fourth scan in the infrared, and then replacing all the pixels that are opaque in the infrared by interpolating from nearby pixels. The metallic silver forming the image blocks the infrared quite thoroughly; the algorithms then proceed to produce weird results. It's not the B&Wness that's the problem, though, it's that the image is formed from metallic silver. Ilford XP2 B&W negatives work fine with ICE. And some Kodachrome films, especially older ones, cause trouble as well. Ctein says it's mostly the cyan dye, and it's not nearly as solid a problem. It's worth trying Kodachrome (if there's damage that won't clean off by conventional means), to find out if the particular images benefit from ICE on your particular scanner. -- David Dyer-Bennet, dd-b@xxxxxxxx; http://dd-b.net/ Snapshots: http://dd-b.net/dd-b/SnapshotAlbum/data/ Photos: http://dd-b.net/photography/gallery/ Dragaera: http://dragaera.info
