[filmscanners] Re: Correct/best methods of scanning

["Tony Sleep" <TonySleep@halftone.co.uk>]

On Mon, 09 Dec 2002 13:32:53 +0100  Roger Eritja (eritja@terra.es) wrote:

>  Some friends say that scanning must be done to the exact final size,
> because every resampling is destructive.

CCD scanners operate at a fixed output resolution, which (unless they
interpolate up) will be the maximum ppi. So downsizing is inescapably
invoked even by 'scanning to the exact final size'. The trouble is that
most less-than-max resolutions in scanner s/w simply has the scanner drop
pixels, which is far inferior to bicubic resampling done in PS. The
aliasing he is worried about is also inescapable, but smooth aliasing
produced by resampling is much better than huge jaggies caused by dropped
pixels. And he can counteract some of the apparent softness using USM. So,
in summary, he's completely wrong :-)

Regards

Tony Sleep - http://www.halftone.co.uk
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