Re: [darktable-devel] Canon 550D noise prof

2012-12-19 Thread Jean-Sébastien Pédron
On 19.12.2012 14:38, Emre Meydan wrote: > Thanks. Is there a command that simply generates a database directly > from a presets.txt file? (without re-processing the photos?). There is none currently. But if you kept the directory with your RAW images and the generated files, just re-run the comman

Re: [darktable-devel] Canon 550D noise prof

2012-12-19 Thread Emre Meydan
> > 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

Re: [darktable-devel] Canon 550D noise prof

2012-12-18 Thread johannes hanika
On Wed, Dec 19, 2012 at 2:33 AM, Emre Meydan 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: > htt

Re: [darktable-devel] Canon 550D noise prof

2012-12-18 Thread johannes hanika
On Wed, Dec 19, 2012 at 6:11 AM, Roumano 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 be

Re: [darktable-devel] Canon 550D noise prof

2012-12-18 Thread Emre Meydan
Thanks Christian! Can you also test this last preset and report whether it's better or worse? ... emre On Tue, Dec 18, 2012 at 6:11 PM, Roumano 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

Re: [darktable-devel] Canon 550D noise prof

2012-12-18 Thread Roumano
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 fl

Re: [darktable-devel] Canon 550D noise prof

2012-12-18 Thread Emre Meydan
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 t

Re: [darktable-devel] Canon 550D noise prof

2012-12-17 Thread johannes hanika
hey On Tue, Dec 18, 2012 at 2:33 AM, Emre Meydan 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

Re: [darktable-devel] Canon 550D noise prof

2012-12-17 Thread Roumano
Hi Again, Excuse me, i sayed a big mistake : After johannes add my merge, i have redone new preset (but it's wasn't merge as johannes sayed : >you sure these are better? the blue channel is still misbehaving a >little, and the curve fit for iso 100 seems to be off a little (see >iso100.pdf, how

Re: [darktable-devel] Canon 550D noise prof

2012-12-17 Thread Emre Meydan
Hi Roumano, I actually haven't tried your presets yet -- will do, and report whether i see any difference or not. But it makes sense that they should be behaving similarly :) My shots aren't perfect either, i'm planning on trying once again. I'm waiting for a sunny day to get more contrast and cl

Re: [darktable-devel] Canon 550D noise prof

2012-12-17 Thread Roumano
Hi Emre, I have take the first shoot from the 550d, but i known my shoot are far from perfect... I have planned to improve this, but you pass me ;) I have compiled a test version with both preset, i can't see any real difference between them. (tested on iso 800 1600 & 3200) johannes, can you lo

[darktable-devel] Canon 550D noise prof

2012-12-17 Thread Emre Meydan
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 shado