Archived posting to the Leica Users Group, 2012/06/26

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Subject: [Leica] TMZ?
From: benedenia at gmail.com (Marty Deveney)
Date: Wed, 27 Jun 2012 12:37:04 +0930
References: <CA+yJO1AgvZmQVSwC=fU8+NZN78vdRHgY1kJK-z1DFn+E6NfEWA@mail.gmail.com> <CAMGHw9DXzcGXtKGBTCoyOeQ6Bzy+=GA_bvTu4BPR+QxtGoGVrw@mail.gmail.com>
 
> Is 'noise' so much different than 'grain'?

Yes, totally.  Grain is random but distributed predictably across
different tones, and varies at tonal boundaries due to a range of
physico-chemical effects.

Noise varies by colour of the scene (especially in low light), is more
predictably distributed (this is why noise reduction works very well
on digital images but not so well on scanned film), and does not vary
at tonal boundaries unless those boundaries also have sharp colour
difference.

Marty
Replies: Reply from rcmphoto at yahoo.com (R. Clayton McKee) ([Leica] TMZ?)
 In reply to: Message from images at comporium.net (Tina Manley) ([Leica] TMZ?)
Message from digiratidoc at gmail.com (James Laird) ([Leica] TMZ?)