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Re: Scanning multiple times (was Re: filmscanners: Vuescan gripes)

OK-- I was just too hasty and slipshod in my reading.  Thanks to you
and Lynn for helping me get straightened out and dried off.

On Sat, 21 Jul 2001 11:12:23 +1000, you wrote:

>"S. Matthew Prastein" <smprastein@earthlink.net> wrote:
>> I seem to be missing something.  I have an Acer Scanwit 2740S, which
>> requires multiple passes to do a multiple scan.  I thought that this
>> was the right thing to do to get lower noise when scanning at 16x. so
>> as to be able to average the input from successive reads. And, I
>> thought this would help in extracting info from seriously underexposed
>> negatives.   Am I all wet on this?
>What Ed is saying is that having done a 16X scan once on a given frame
>of film, you shold never have to do another 16X pass on the same frame.
>Use Scan Memory to rescan the data you already have, or output the
>raw file so you can recrop later without rescanning.
>Multiscanning will give you lower noise as you suggested, and in the
>process will give a little more signal.  Personally I have never done
>a 16X scan.  With the LS30 and multipass scanning, I don't think there's
>much benefit after about 4 passes.  If I had an LS2000 or more recent
>scanner, single pass multiscanning would make 16X worthwhile.
>It would be worth scanning the same frame at 4X, 8X and 16X and comparing
>the result.

Matt Prastein


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