Peter Klein wrote:
> I know that the Noise
> Filter Settings denote how much data is *considered* noise, relative to
> the
> profile, and the Noise Reduction Amounts denote how much reduction is
> actually applied. But I don't really understand what practical (visual)
> difference it makes to adjust one as opposed to the other.
The noise filter settings are all about characterising and identifying the
noise as accurately as possible, without which NI isn't going to work
optimally.
Having done that, how much you apply will vary according to the settings
on the next tab, and will vary according to the image.
If you get the first wrong, NI may produce artefacts or work unevenly
across the tonal range, or just not reduce noise at all.
If you get the second wrong, the image will remain noisy or turn to
plastic goo *as well as* producing artefacts or working unevenly, if the
settings were no good as well.
So it's important to get the Filter Settings correct, whilst the amounts
are subjective variables.
Fortunately, once you've created filter settings for a particular
scanner/film combination, or digicam at a specific ISO, you can save and
re-use them, adjusting only the amounts.
Regards
Tony Sleep -
Online portfolio & exhibit + film scanner info & comparisons
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