Definitely looks like a bug. Same happens here with other images as well. The root cause seems to be the "flip" function in crop&rotate. It produces a white (?) line at the left of the roi when activated with mode "horizontal", on the top of the roi with mode "vertical" and on both sides if the two are combined. The shadow&highlights module makes this white line more visible.
Here is how to best see: 1) open image in darkroom (ideally an image with homogeneous color, e.g. blue sky) 2) zoom into image (e.g. 200%) 3) activate crop&rotate with horizontal flip 4) switch on shadows&highlights with radius 200 5) move the roi around: at each position you see the left side being lighter than it should So we have a likely problem with the roi calculation in the module which is most complex in this aspect :( Ulrich Am 04.06.2015 um 13:26 schrieb thokster: > > Here is an image with blurred foreground. There it is obvious. > Try toggling on/off crop and rotate with horizontal flip. > BTW a (horizontal) flip is changing the log./lin. histogram. Wouldn't > expect that but that's probably some missing knowöedge on my site. > > OT: I would expect that only the wavefront histogram is flipping. The > wavefront changes as expected but only twice when toggling. > > https://dl.dropboxusercontent.com/u/352146/Shadhi%20and%20flip/P1220469.RW2 > https://dl.dropboxusercontent.com/u/352146/Shadhi%20and%20flip/P1220469.RW2.xmp > > > regards > thokster > > > Am 03.06.2015, 19:14 Uhr, schrieb Ulrich Pegelow > <ulrich.pege...@tongareva.de>: > >> Hi, >> >> I cannot reproduce. Shadows&highlights its default settings uses a >> strong gaussion blur. If by some effect the input to this module >> contains even a 1 pixel defect line at one of the borders, this would be >> smeared by the gaussian blur to a visible size. >> >> Not possible to decide based on what I know. >> >> Please open a ticket in redmine and attach an example raw+xmp. >> >> Ulrich >> >> Am 03.06.2015 um 09:56 schrieb thokster: >>> Hi, >>> >>> using the shadows and highlights module and flip the image horizontal >>> makes a light border at the left side of the image. >>> >>> Is this a known behavior? >>> Can anybody reproduce it? >>> >>> Tested with git-master and different raw files (Nikon, Canon, >>> Panasonic). >>> >>> regards >>> thokster >> ------------------------------------------------------------------------------ _______________________________________________ Darktable-users mailing list Darktable-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/darktable-users
