I am finding that the 'denoise (profiled)' when switched from NLM to
wavelets is doing a fairly good job in particular on my sky areas ....
it is a bit aggressive but can be toned down as needed.

On 03/10/2018 05:34 PM, Robert Krawitz wrote:
> On Sat, 10 Mar 2018 17:04:45 +0100, David Vincent-Jones wrote:
>> When I apply the 'denoise (profiled)' onto a fairly raw image the
>> results, on my data, look quite acceptable. I have been trying to see
>> which modules that I am using are creating more noise than others.
>> In another test I have used the para. mask to eliminate some processing
>> from sky areas ... it is a bit tedious but it appears to help. I still
>> feel that the blue is the trouble-maker.
> Tedious is something I cannot abide when I'm processing a few hundred
> game photos (much less 3 weeks ago, when I had 600 frames).  I need
> the most efficient workflow I can get.  It's already wasteful to me
> that I can't simply hit space to move to the next photo and be able to
> crop right away; I need to click on the crop settings to be able to
> crop.
> For my use case, I don't need absolute elimination of noise, but I
> like to cut down the noise some for the very high ISO settings I use.
> If I were able to shoot at ISO 1600 I wouldn't even both bother with
> NR at all.  But I don't want artifacts or complete removal of detail.
> If I didn't have an alternative I'd accept the noise.
>> On 03/10/2018 04:56 PM, Robert Krawitz wrote:
>>> On Sat, 10 Mar 2018 16:44:24 +0100, David Vincent-Jones wrote:
>>>> Your examples interest me since they are shown on a blue subject. My
>>>> experience with a fully profiled sensor is that the 'basic' Denoise
>>>> (profiled) works quite well by itself EXCEPT for blue sky areas.
>>>> My sky areas tend to form into rosette clumps whenever some reasonable
>>>> degree of processing is applied. It has led me to believe that it is the
>>>> blue color that is causing the greatest problem.
>>> That's not my experience -- I'm seeing clumps like this in plenty of
>>> other places.
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