- Original Message -
From: Lynn Allen [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Wednesday, April 04, 2001 3:58 AM
Subject: filmscanners: Noise (was: Printing A3 from a 2700dpi scan
I'm less interested in the "why's" of the problem than in a means of
dealing
with it.
Joe wrote:
File compression (such as with jpeg) can also contribute to noise in the
blue channel.
Curiously enough, JPEG compression (along with resizing) can also (and only
sometimes) *reduce* the amount of noise in a picture. Which, to me,
indicates that noise *and* JPEG are not exactly
It appears to me that Rob is talking about "grain-aliasing" (in negs), and
Joe is talking about "noise" (in the blue channel). To me the "noise"
phenomenon looks almost identical to aliasing in either slides or negs, and
yes, it's predominant in the (dark) blue channel in both cases. It always
