If anyone is interested in an example of a DNG file that I'm having trouble
doing noise reduction with, here it is:
https://docs.google.com/file/d/0BzFGDdZw7pVwQWdQaXFKSkNiN3c/edit?usp=sharing
Yes, it looks absolutely terrible. It's part of a time lapse video I shot
using Magic Lantern's RAW HDR video with FPS override. The results
definitely could have been better if I shot using RAW pictures rather than
RAW video, but I want to see how well it can work. Details of the DNG are
ISO 3200, Aperture F4 and shutter speed 5s (I only have a 10 stop ND at the
moment so that's what I can do)
On 9 June 2013 10:19, Jiew Peng Lim <brapo...@gmail.com> wrote:
> Hi,
>
> I'm using Magic Lantern to do RAW HDR video, and basically the camera
> takes the video in RAW format and you extract the individual frames as DNG
> files.
>
> When I import them into DT (actually I just import one frame to edit and
> then call darktable-cli to export everything), there is no option to use
> the normal profiled noise reduction (e.g. 60D ISO 3200). Is there any way
> to use normal profiled noise reduction on these DNG files? The DNG files do
> not store EXIF information so there is no aperture, ISO and shutter speed
> details.
>
> I've tried creating presets from using normal RAW files (.CR2) for each
> ISO setting, but when I apply them, the module just applies the standard
> poissonian distribution NR, which somehow just smudges the entire image
> (perhaps there's too much noise and hot pixels that the module just wants
> to remove everything).
>
> So, is there any way to remove noise from these DNG files efficiently? I
> don't need to remove all the hot pixels since there are tools in video
> editing software that does that better, but it would be nice if there was a
> way to remove noise from the DNG files before I export them and bring them
> into a video editing software.
>
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