On Wed, Dec 19, 2012 at 6:11 AM, Roumano <[email protected]> wrote: > Le mardi 18 d�cembre 2012 à 14:33 +0100, Emre Meydan a écrit : >> Hi Johannes, >> >> >> If the important thing is how closely the curves follow sigma=1 in >> "flat noise levels" graphs, then one of my earlier photo shoots >> actually seems to be better -- the curves follow 1 more tightly with >> less fluctuation: >> http://emremeydan.com/tempor/550d-denoise_02.tar.gz >> >> >> >> Do you think these would work better? I can't directly compare them to >> the other ones, because i don't know how to get both sets of presets >> into darktable database. > Hi, > > Very simple : > add your preset (form preset.txt) to the file src/iop/denoiseprofile.c > name them as you want, like '{N_("canon eos 550d 2 iso 100"),on all iso > wanted then build.sh (& cd build && sudo make install) as usual.
or even simpler, `git pull' the latest denoise branch and do that: ~/darktable/tools/noise/gen-profile -d /dir/where/your/shots/are and it will create a library.db with the presets in them for you to test (instructions when the script finishes). thx to dumbbell, no more recompile needed :) cheers, jo > > Regards > > >> If these are also not good enough, i'm willing to give it one last >> try, and shoot another set. I mean, if there's an improvement to be >> made, it should be made :) I'm just waiting for a bit of sun, so i can >> get high contrast and good clipping. >> >> >> >> Thanks! >> >> ... >> >> emre >> >> >> >> On Mon, Dec 17, 2012 at 10:29 PM, johannes hanika <[email protected]> >> wrote: >> hey >> >> On Tue, Dec 18, 2012 at 2:33 AM, Emre Meydan >> <[email protected]> wrote: >> > Hi, >> > >> > I know somebody else was working on a profile for this >> camera, but i also >> > wanted to try it myself. >> > >> > I had to make three different sets of shoots before i got a >> nice profile. >> > What i tried last (and what seemed to work) was to shoot the >> window of my >> > room: the sky was overexposed, while the shadows in the room >> provided >> > underexposure. I also exhaled on the lens for a bit of >> extra-blur :) >> >> >> good idea :) >> >> > I'm not sure if everything is as it should be: looking at >> the graphs, the >> > red channel is not clipped, and for iso 400 & 1600 the blue >> channel also >> > doesn't seem to be clipped (though close). >> >> >> graphs look fine. iso 100 is not quite as overexposed as the >> others, >> so the fit is not optimal (but who denoises iso 100..). >> >> if roumano agrees, i'd use your values as new values for the >> 550d. >> >> cheers, >> jo >> >> > But after initial testing it seems to work very well. Up to >> 400 iso the >> > results are really good. With higher iso the profile removes >> fine noise, but >> > larger color blotches remain -- as other people noted. I >> guess they require >> > a different kind of noise reduction. >> > >> > One small problem i have is that, in the presets section i >> see two different >> > sets of presets: half of the presets are named "Canon 550D", >> but selecting >> > them doesn't change a thing (even though darktable seems to >> calculate stuff >> > when they're selected). The other half are simply called >> "test" and they are >> > the ones that work. >> > >> > You can get the resultant files here, and check if anything >> is wrong: >> > http://emremeydan.com/tempor/550d-noise_01.tar.gz >> > >> > Included is a camera-jpeg of 400iso, to show you what i used >> for profiling. >> > I can also send the raw files if you need them. >> > >> > Thanks a lot for the hard work! >> > >> > ... >> > emre >> > >> >> > >> >> ------------------------------------------------------------------------------ >> > 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
