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Noise reduction?
Posted: Mon Sep 17, 2007 2:31 pm
by CoolColJ
Some links that maybe useful for Ono and others
noise reduction
http://www.cgl.uwaterloo.ca/Projects/re ... /aniso.pdf
Posted: Tue Sep 18, 2007 4:09 am
by Kram1032
I think, I don't want noise reduction in Indigo...
Violet is for those things and it's Open Source. Anyone can develop it
Posted: Tue Sep 18, 2007 10:05 am
by CoolColJ
but a noise reduction process that is part of the render prcoess that does not destroy edges, textures details etc is not a bad idea IMO
Posted: Tue Sep 18, 2007 10:15 am
by deltaepsylon
as long as we don't get blurred edges, and its still (mostly) physically accurate, and its not *too* slow, im all for it.
Posted: Tue Sep 18, 2007 10:57 am
by CoolColJ
well if you cna turn it on/off in the ini file then that's even better
Posted: Tue Sep 18, 2007 11:41 am
by zsouthboy
No noise reduction.
If you want it, do it post-process.
Plenty of people smarter than us have coded noise-reduction programs - let's not reinvent the wheel.
Posted: Tue Sep 18, 2007 12:16 pm
by CoolColJ
post render noise reduction is always destructive
read the paper and you will understand
Posted: Wed Sep 19, 2007 4:11 am
by Kram1032
as a switch, it's ok, indeed
anyone can choose ones preferred way to go
I wonder, what's about delta-sampling
they also do it "post process"... I guess, it would slow down the render quite a lot...
the pics have quite bad Aliasing Artefacts... I wonder, if that would harm the current close-to-perfect Indigo AA...
overally, I'm not sure, if I want it...
I think, it's kinda biased...
(though, I didn't read through the whole thing...)
AA in those examples is extremely bad...
but ok. That's the case in both the noisy and the denoised pic...
Posted: Wed Sep 19, 2007 4:13 am
by OnoSendai
The images in that paper have that horrible water-colour like effect which so many noise reduction algs tend to have.
Posted: Wed Sep 19, 2007 6:21 am
by zsouthboy
OnoSendai wrote:The images in that paper have that horrible water-colour like effect which so many noise reduction algs tend to have.
Yeah - I love it.
"OMG NO NOISE!11" - Yeah, but your image is now a smudgy piece of shit.
See also: point and shoot cameras above ISO 100.
At least Indigo isn't any chroma noise (blotchy reds and blues and greens), like those though.
Posted: Wed Sep 19, 2007 6:31 am
by Kram1032
yeah...
I still wonder, what's about delta sampling, and why the idea died...
there are some renders, starting with coloured noise to get clearer and clearer...
maybe, that's one of them^^
(although, it's definitely quite a low quality one...)