On Wed, Dec 19, 2012 at 2:33 AM, Emre Meydan <[email protected]> wrote: > 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
these graphs look perfect, i'll use those numbers. -jo > 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. > > 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
