Archived posting to the Leica Users Group, 2012/06/26
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Very true from a technical view... but I'm thinking that the average (ie, human) viewer isn't going to be that concerned.? If you're working on noise reduction algorithms that's one thing... but looking at it on the wall or the screen strictly as an image is something else, and I don't know that it makes that much difference.? (That's an off-the-cuff SWAG with no backup except that I've had comments from total layfolk who don't seem to be aware that there is any difference. If you've got studies or evidence one way or another PLEASE show it.? I'd like to know.) ? R. Clayton McKee PhotoJournalist from somewhere just south of somewhere else... >________________________________ > From: Marty Deveney <benedenia at gmail.com> >To: Leica Users Group <lug at leica-users.org> >Sent: Tuesday, June 26, 2012 10:07 PM >Subject: Re: [Leica] TMZ? > >> 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 > >_______________________________________________ >Leica Users Group. >See http://leica-users.org/mailman/listinfo/lug for more information > > >