Re: [darktable-devel] Measuring the base curve

Hallöchen! Torsten Bronger writes: > [...] > > I may revoke this plea if too many pictures are made available, > since at the current stage, I am only interested in finding out > whether my method is applicable to other cameras, too. Please don't send in further pictures for this. Thank you to

Re: [darktable-devel] Measuring the base curve - Pentax K-5IIs

Hallöchen! Michael Born writes: > please find the base curve of a Pentax K-5IIs here: > http://rapidshare.com/files/527696293/basecurve.dat The > corresponding pictures are: > http://rapidshare.com/files/3735246463/IMGP0950.DNG and: > http://rapidshare.com/files/2099002397/IMGP0950.JPG > > The jp

Re: [darktable-devel] Measuring the base curve

2013/8/13 Torsten Bronger > Hallöchen! > > bartokk writes: > > > 2013/8/4 Torsten Bronger < > bronger-vbodrt1yutdtpoovwizczbs11bumm...@public.gmane.org> > > > >> At , I summarise my > >> results trying to get the base curve of my camera's JPEG engine. > >> I

Re: [darktable-devel] Measuring the base curve - Pentax K-5IIs

Hi Torsten, please find the base curve of a Pentax K-5IIs here: http://rapidshare.com/files/527696293/basecurve.dat The corresponding pictures are: http://rapidshare.com/files/3735246463/IMGP0950.DNG and: http://rapidshare.com/files/2099002397/IMGP0950.JPG The jpg has the default image tone setti

Re: [darktable-devel] Measuring the base curve

Hallöchen! bartokk writes: > 2013/8/4 Torsten Bronger > > >> At , I summarise my >> results trying to get the base curve of my camera's JPEG engine. >> It worked pretty well I would say. Granted, I could not model >> the behaviour at *very* low values ver

Re: [darktable-devel] Measuring the base curve

Hallöchen! Robert William Hutton writes: > On 13/08/13 20:49, Torsten Bronger wrote: > >> I did only the 350D and it worked. I reproduced DT's "Canon >> alternative" quite accurately, so any other preset would be >> superfluous. FWIW, the exact findings can be reproduced in DT >> with > > Inter

Re: [darktable-devel] Measuring the base curve

On 13/08/13 20:49, Torsten Bronger wrote: > Robert William Hutton writes: > I did only the 350D and it worked. I reproduced DT's "Canon > alternative" quite accurately, so any other preset would be > superfluous. FWIW, the exact findings can be reproduced in DT with Interesting. The current def

Re: [darktable-devel] Measuring the base curve

Hallöchen! Pascal Obry writes: > Hi Torsten, > >> You may copy >> >> 0.00, 0.00},{0.000100, 0.000647},{0.001000, >> 0.000753},{0.01, 0.005992},{0.03, 0.036068},{0.07, >> 0.154459},{0.10, 0.240735},{0.15, 0.361325},{0.20, >> 0.453970},{0.25, 0.534198},{0.30

Re: [darktable-devel] Measuring the base curve

yes and implemented it, so I can test it btw I did make the basecurve.dat file on my system. only didn;t know how to implement itm see also Pascal mail regards en thanks 2013/8/13 Torsten Bronger > Hallöchen! > > Ger Siemerink writes: > > > [Canon 60D testshots] > > This time, it worked very

Re: [darktable-devel] Measuring the base curve

Hallöchen! Robert William Hutton writes: > On Mon, Aug 12, 2013 at 12:21:59PM +0200, Torsten Bronger wrote: >> Robert William Hutton writes: >> > On 12/08/13 09:25, Torsten Bronger wrote: >> > >> >> I know feel confident enough to check bascurves of other cameras. >> >> [...] >> > >> > Would 350D

Re: [darktable-devel] Measuring the base curve

Hi Torsten, > You may copy > > 0.00, 0.00},{0.000100, 0.000647},{0.001000, > 0.000753},{0.01, 0.005992},{0.03, 0.036068},{0.07, > 0.154459},{0.10, 0.240735},{0.15, 0.361325},{0.20, > 0.453970},{0.25, 0.534198},{0.30, 0.610010},{0.35, > 0.681030},{0

Re: [darktable-devel] Measuring the base curve

Hallöchen! Ger Siemerink writes: > [Canon 60D testshots] This time, it worked very well. The basecurve can be investigated at , this time with the number of counts per RAW brightness included. At 0.92, there is a slight problem (whyever),

Re: [darktable-devel] Measuring the base curve

2013/8/4 Torsten Bronger > Hallöchen! > > At , I summarise my results > trying to get the base curve of my camera's JPEG engine. It worked > pretty well I would say. Granted, I could not model the behaviour > at *very* low values very well. This may be im

Re: [darktable-devel] Measuring the base curve

Hallöchen! jeremy rosen writes: >> And the divisions by zero are triggered by RAW brightnesses that >> do not occur in the picture. It is fixed now. A good image >> should cover all brightness levels, though. > > if you can detect missing brightness, do you print a warning to the user ? > that

Re: [darktable-devel] Measuring the base curve

> And the divisions by zero are triggered by RAW brightnesses that do > not occur in the picture. It is fixed now. A good image should > cover all brightness levels, though. > > if you can detect missing brightness, do you print a warning to the user ? that would be an easy way to enforce some so

Re: [darktable-devel] Measuring the base curve

Hallöchen! Pascal Obry writes: > Le 13/08/2013 08:57, Torsten Bronger a écrit : > >> The results can be found here: >> http://wilson.homeunix.com/basecurve/d800/ > > Thanks a lot! I tried to run the script on my side but it ends up > with a divide by 0 after eating lot of memory. I was wondering

Re: [darktable-devel] Measuring the base curve

> BTW, should I just commit this new curve into dt under the name "nikon > D800"? > > Pascal. > > I don't think that's a good idea at this point (emphasis on "at this point") we need to validate the script with a couple more cameras and we need a way to enhence our auto-applying mechanisms to detec

Re: [darktable-devel] Measuring the base curve

Le 13/08/2013 08:57, Torsten Bronger a écrit : > The results can be found here: > http://wilson.homeunix.com/basecurve/d800/ Thanks a lot! I tried to run the script on my side but it ends up with a divide by 0 after eating lot of memory. I was wondering how much memory do you have to run this? On

Re: [darktable-devel] Measuring the base curve

Okay, thanks, try this one http://www.gersiemerink.net/IMG8474.zip If needed I will retry the first image (from black to white, in grey etc) greetz Ger 2013/8/13 Torsten Bronger > Hallöchen! > > Ger Siemerink writes: > > > Are these images good enough? > > download it here: > > > > http://www

Re: [darktable-devel] Measuring the base curve

Hallöchen! Ger Siemerink writes: > Are these images good enough? > download it here: > > http://www.gersiemerink.net/CANON_EOS60D.zip Thank you, but I seem to have trouble with the pixel offsets of both images. Could you also upload an ordinary sharp JPEG+RAW pair? Thanks. Tschö, Torsten. --

Re: [darktable-devel] Measuring the base curve

Hallöchen! Pascal Obry writes: > Hello, > >> I know feel confident enough to check bascurves of other cameras. >> If you have the time, please take picture pairs as described as >> in http://wilson.homeunix.com/basecurve/ section 1 and make them >> downloadable somewhere for me. > > What about a