It was a long time back I ran into this issue and remember trying to 
solve it for weeks on those particular shots
I gave up and got back to Rawtherapee. Have been following both user and 
dev forum for some
time and have seen this issue on the forums several times. Have also 
tried all the suggestions in the past.

When the issue again was raised and again was handed back to the user as 
a useability problem I finally had to
voice my opinion. But I will try all your suggestions. If I don't solve 
it I will post the issue on the user forum.
If I solve this issue I will post it on the user forum.

And if this works it's about time to start writing good tutorials on Dt 
on how to handle this issues.
Then you devs can focus on development. If the blog become big enough 
you are free to use my articles.

Blending is a bit like black magic for me. Why not write a good blog 
article about how blending works.

These days I use Canon 7D mainly for shooting film and and will rather 
use my Pentax K-5 for images because of the image quality.

)-|algeir


Den 16. des. 2013 14:42, skrev Christian Iuga:
> Hi,
>
> - You can try this : (can found this information on darktable google+
> group, darktable-users group list & darktable-devel group list)
>
>      suggested way of using profiled denoise is to use non-local
> means with the lightness blend mode
>      and then create another instance of profiled denoise with the
> wavelets mode using the color blend mode
>
>
> - Or another possibility it the profiled denoise of your camera was
> badly created ?
>
> - Or you don't apply correctly ? What you see on darkroom (or
> ligthroom) not represent exactly what it's done when it's exported...
> (you seem's a new user of DT & make easy critical )
> - Are you apply them on a RAW file ? have you profiled you screen, ...
>
> Regards
>
>> From: "Halgeir Kjønås Rennehvammen" <halge...@gmail.com>
>> To: darktable-devel <darktable-devel@lists.sourceforge.net>
>> Cc:
>> Date: Mon, 16 Dec 2013 13:40:23 +0100
>> Subject: Re: [darktable-devel] white dots hight ISO
>> Denoise (profile) removes to much details for my taste so I have to use 
>> denoise (non >local means) and the equalizer
>> to get best results.
>> To follow up the case further. The problem is on raw images from noisy 
>> cameras like >Canon 7D on high iso levels.
>> Give me a couple of days and I will dig in my archive and find those 
>> problematic raw >images, if I still have those shots.
>> Basically the problem was in images with iso 3200 and greater.
>> On other camera systemes with a different sensor like Pentax, Sony og Nikon 
>> this is >a non existing problem.
>> Canon sensor don't handle noise very well and the raw files is a pain to 
>> process i Dt.
>> )-|algeir


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