Filmscanners mailing list archive (filmscanners@halftone.co.uk)
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[filmscanners] Re: Software dust removal
>I suggest you look for any detail removed with Digital ICE because there
>will probably not be any detail removed. The reason the image may look
>less sharp is because the eye is being tricked by the surface defects
>(dust, scratches, etc.). There shouldn't be any residual silver in C-41
>processed film. The reason the eye is "tricked" is because the eye is
>looking for the finest detail in the image to judge sharpness. In many
>cases the finest details are the surface defects. When those are removed
>the image appears less sharp when actually the image detail remains.
A simple test can provide the additional confirmation/refutation of this.
Scan a negative with a film scanner that can do precise line repeat scanning,
i.e. a film-scanner such as the LS-4000 etc.
Do one scan with ICE on 'fine', another without 'ICE'
pop both images into Photoshop. Superimpose one as a layer against the other
and do a 'difference' mode for the layers.
Images w/o ICE are noticeably sharper, though more dirty. For myself, it
isn't that much of an issue except for a few scans so by default I use ICE,
but for the most imp't scans, I don't use ICE and do scratch/detail repair by
hand.
Dieder
----------------------------------------------------------------------------------------
Unsubscribe by mail to listserver@halftone.co.uk, with 'unsubscribe
filmscanners'
or 'unsubscribe filmscanners_digest' (as appropriate) in the message title or
body
|
