On 13/07/14 23:21, Rob Z. Smith wrote: > Sure – there are lots of ways J > I recommend as a first use just switching on the ‘profiled denoise’ module. > If that doesn’t do enough then you might > want to apply some colour noise reduction – Rob Hutton’s video linked to on > the darktable webpage’s resource tab > provides some good examples
Yep, the relevant video is this one, which compares various different noise reduction approaches in darktable: https://www.youtube.com/watch?v=4nBzAeM0tpI&index=4&list=PLmvlUro_Up1NBX7VK8UUuyWo1B468zEA0 Personally, when pushing the exposure up a lot to compensate for a heavily underexposed image, I find I get the best results using the Equalizer. I suggest you try some of the Equalizer presets to get started. It sounds to me like your problem is chroma noise, so you might want to play with the lower spline on the chroma tab. Cheers, Rob > *From:*Martin Marmsoler [mailto:[email protected]] > *Sent:* 13 July 2014 19:35 > *To:* [email protected] > *Subject:* [Darktable-users] Noise > > > > Hi, > > i had a picture that was extremely underexposed and so I increased the > exposure, but then there was so many noise (not > how in Lightroom where the noise is white-black) which consists blue, red, > violet pixels. Is there a posibility to make > these pixels how in Lightroom more inconspicuous? > > Martin ------------------------------------------------------------------------------ Want fast and easy access to all the code in your enterprise? Index and search up to 200,000 lines of code with a free copy of Black Duck® Code Sight™ - the same software that powers the world's largest code search on Ohloh, the Black Duck Open Hub! Try it now. http://p.sf.net/sfu/bds _______________________________________________ Darktable-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/darktable-users
