heya,
thanks for the profile, your graphs look very good. noise variance goes up
to just below 2x in dark areas, so you might need some special magic at
times to bring noise down near the blacks.
pushed your data to git master.
cheers,
jo
On Tue, Feb 25, 2014 at 4:31 AM, Deryk Lister
<[email protected]>wrote:
> Hi all. Not sure if I should be posting this here or on the dev list,
> but I'm not exactly a developer.
>
> Noticing that there weren't any noise reduction profiles for my LX7, I
> grabbed the latest git repository and followed the instructions here:
> http://www.darktable.org/2012/12/profiling-sensor-and-photon-noise/ to
> create noise profiles at all ISO levels.
>
> You can download the resulting tarball here:
> http://files.deryk.co.uk/dt-noiseprofile-20140224.tar.gz
> Hopefully they'll be suitable for adding to future versions.
>
> This is my first time doing anything like this so please do check the
> results and forgive any silly errors. I read and attempted to digest
> the information on the page, but in all honesty quite a lot of the
> technical explanation on how noise reduction works went "whoosh!" over
> my head (I found my mathematical limits way back at age 17) and so I
> just went ahead and ran the "gen-profile" script. The results look good
> to me on the images I've tried, but I've not tested the silly-high ISOs
> yet as I never go above 1600 on this camera.
>
> I noticed that it doesn't seem to do much on-screen (performance reasons
> I suppose), but once the image is exported the noise reduction is
> fantastic - in wavelets mode I'd say it's on par with the top secret
> proprietary jpeg processing built into the camera.
>
> I'm not sure if it matters at all, but all profiling images were taken
> at 16:9 (it's a multi aspect sensor, rather than a cropping type).
> Higher ISOs were more tricky to keep out of focus due to having to close
> up the aperture and gain a bit too much depth of field, but I think they
> were unfocused enough.
>
> Cheers
> Deryk
>
>
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