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Re: [OM] Another NR datapoint

Subject: Re: [OM] Another NR datapoint
From: Philippe <photo.philippe.amard@xxxxxxxxx>
Date: Tue, 12 Nov 2019 18:06:03 +0100
The thing is, as soon as you touch the noise, you have to address the 
remainder. The original worked as a testimony. A fully edited version might 
become a document.

Amities

Philippe



> Le 12 nov. 2019 à 14:03, Tina Manley <tmanley@xxxxxxxxx> a écrit :
> 
> I prefer the grainy version, too.  I do have Neat Image and Topaz DeNoise
> and Nik's noise remover but I don't use them much.  If I do, I fade the
> effect by about 75%.  I just like grain with film images.
> 
> The blue tint to the photo is air pollution which was terrible in Berlin in
> 1989.  That's really what it looked like.
> 
> Thanks!
> 
> Tina
> 
> On Tue, Nov 12, 2019 at 7:16 AM Wayne Shumaker <om3ti@xxxxxxxx 
> <mailto:om3ti@xxxxxxxx>> wrote:
> 
>> The wall is a great shot. I do prefer Tina's original grainy version. It
>> has more wabi-sabi. I hope she continues with her project, embracing any
>> imperfection rather than rejecting it.
>> 
>> At 11/11/2019 08:29 PM, Moose wrote:
>>> When I saw Tina's photo of the Berlin Wall, I was interested in the
>> noise. This is in no way a comment on her decision to keep the noise - but
>> it's such an interesting case that I wanted to look into it.
>>> 
>>> First of all, the noise in the sky increases the higher it goes. I don't
>> know if that is down to the film or to scanning software.
>>> 
>>> I've been quite interested in Topaz Denoise AI. I've seen it perform
>> miracles - and fail.
>>> 
>>> Here, it does a great job on the wall, the black coat, the monument/gate
>> and the lower part of the sky, but does almost nothing to the top. <
>> http://www.moosemystic.net/Gallery/tech/Process/NR/Wallnoise.htm>
>>> 
>>> I tried heavier settings, to little avail. So I tried creaky old
>> Neatimage 4, at settings that seriously blur detail, but clean up the sky
>> nicely, and applied it as a mask to sky only.
>> 
>> Non-comment noted...
>> 
>> I found that Denoise AI starts to fail when the noise becomes too much. As
>> if it starts to think the noise is important detail and may even enhance
>> it. With most digital noise, the noise is at the pixel level. Film has
>> grain, noise can increase in size with grain. With my A7iii at ISO 3200,
>> Denoise AI works great, but fails totally at ISO 65535. If you look close
>> at the denoise AI version, the small grain noise is reduced in the sky.
>> 
>> I have one theory, although Denoise AI has AI in the name, the effect is
>> almost as if it is doing an Inverse LCE (local contrast enhancement) at the
>> pixel level. Hence its radius does not work with large noise, which
>> requires larger radius which blurs the image. How is denoise AI to know
>> what is detail and what is noise? It is only "artificially" smart.
>> 
>> WayneS - Information Theorist
>> --
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>> 
> 
> -- 
> Tina Manley
> www.tinamanley.com <http://www.tinamanley.com/>
> http://www.pbase.com/tinamanley <http://www.pbase.com/tinamanley>
> <http://www.alamy.com/stock-photography/3B49552F-90A0-4D0A-A11D-2175C937AA91/Tina+Manley.html
>  
> <http://www.alamy.com/stock-photography/3B49552F-90A0-4D0A-A11D-2175C937AA91/Tina+Manley.html>>
> *https://www.alamy.com/portfolio/649596.html 
> <https://www.alamy.com/portfolio/649596.html>
> <https://www.alamy.com/portfolio/649596.html 
> <https://www.alamy.com/portfolio/649596.html>>*
> -- 
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