Both the JPG (in geeqie) and the NEF (in darktable 1.4.2) look totally fine to me. I can't see anything in the background unless I do something like push down the black point or apply a crazy tone curve, in which case all I see is the black or dark blue sheet that you used as your backdrop.
Perhaps there's something funky going on with your colour management or something? HTH, Rob On 19/06/14 15:58, Francisco Cribari wrote: > I do a lot of low key portraits using a Nikon D800. The RAW files are edited > using Daktable on a Linux box (Ubuntu > 14.04). Currently, I am running version 1.5+1254~g40b3c8c (from Pascal's > PPA). In a number of photos some "stains" show > up in the black background of (in the processed JPG file). An example is > available at > > https://dl.dropboxusercontent.com/u/2171814/darktable.tar.bz2 > > In this case, the stains can be found in the lower left part of the image > (make sure to zoom in to take a closer look). > Here, I opened the RAW file and exported the JPG file with no further > editing. When I do some minor editing (exposure, > tone curve etc.) the problem gets worse. Using the Nikon alternate base curve > does not help (in most cases). I know that > I can disable the base curve and do all editing from ground zero, but that is > a lot of work when I have a large number > of files to edit. > > Tips and suggestions are welcome. Many thanks in advance. FC > > -- > Francisco Cribari, email: [email protected] <mailto:[email protected]> - "All > theory, my friend, is grey, but green is > life's glad golden tree." --Goethe (Faust) > > > ------------------------------------------------------------------------------ > HPCC Systems Open Source Big Data Platform from LexisNexis Risk Solutions > Find What Matters Most in Your Big Data with HPCC Systems > Open Source. Fast. Scalable. Simple. Ideal for Dirty Data. > Leverages Graph Analysis for Fast Processing & Easy Data Exploration > http://p.sf.net/sfu/hpccsystems > > > > _______________________________________________ > Darktable-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/darktable-users > ------------------------------------------------------------------------------ HPCC Systems Open Source Big Data Platform from LexisNexis Risk Solutions Find What Matters Most in Your Big Data with HPCC Systems Open Source. Fast. Scalable. Simple. Ideal for Dirty Data. Leverages Graph Analysis for Fast Processing & Easy Data Exploration http://p.sf.net/sfu/hpccsystems _______________________________________________ Darktable-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/darktable-users
