To download this file you need to disable your adblocking software! :(
do you have a non-malware place to get your example files? j. On Sat, Dec 8, 2012 at 12:41 PM, Michael Born <[email protected]> wrote: > Dear DT users, > > I read several mailing list posts about noise reduction (NR), the manual > and watched the DT0.9 screen casts, but I still fail to get good NR results. > > I used the following RAW to try the 4 NR methods of DT. > http://www.fastshare.org/download/IMGP3139.DNG > > 1. RAW-NR works ok, but removes a lot of detail. > > 2. Non local means (NLM) I found disappointing. The chroma slider at > 100% and spot size 1 seems to remove the most chroma noise - which is > still very little! I had to look very closely to see that a bit of > chroma noise is removed at all. > > 3. The Equalizer with strong NR looks promising, but a lot of chroma > noise remains and an overall "grainy" appearance. > > 4. The bilateral filter I like the most. (the recommended settings from > johannes [for his Canon with ISO3200] don't work well for my picture) > With a radius of 10 and the rgb sliders at max (0.1000) the color noise > mainly seems to be gone. Unfortunately, a "grainy" appearance which > destroys sharp edges is also there. > > Using 4 together with NLM (size 1, strength 75%, luma 100%, chroma again > seems to make no difference) is "the best" I could achieve. > http://www.fastshare.org/download/IMGP3139_04.jpg > > I compared all the results at 1:1 to the Pentax RAW Tool (silkypix based). > http://www.fastshare.org/dlgo/IMGP3139.jpg > I looked mainly at the region between and slightly above the cups and > the pot (to see the white-black transition in the background). The > missing color noise is what I really like. > > How do you reduce the color noise of high ISO images with DT? What about > the "grainyness"? Any suggestions? > > Cheers, > Michael > > ------------------------------------------------------------------------------ > LogMeIn Rescue: Anywhere, Anytime Remote support for IT. Free Trial > Remotely access PCs and mobile devices and provide instant support > Improve your efficiency, and focus on delivering more value-add services > Discover what IT Professionals Know. Rescue delivers > http://p.sf.net/sfu/logmein_12329d2d > _______________________________________________ > darktable-devel mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/darktable-devel ------------------------------------------------------------------------------ LogMeIn Rescue: Anywhere, Anytime Remote support for IT. Free Trial Remotely access PCs and mobile devices and provide instant support Improve your efficiency, and focus on delivering more value-add services Discover what IT Professionals Know. Rescue delivers http://p.sf.net/sfu/logmein_12329d2d _______________________________________________ darktable-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/darktable-devel
