> I don't know whether you read the list, so I CC'ed you. Sure, when I post directly to a list, I read the list.
> You have to set the "component roles" of the pixels properly, see > http://lensfun.sourceforge.net/manual/group__Correction.html#gaf7c5a3f809c2245211b9f50797b718b3 > In your configuration, Lensfun assumes R,G,B tripletts, thus you see > discontinuities after every three values. If the image is already > demosaiced, this makes sense, because then, Lensfun assumes the same > x,y coordinates for every colour component. This is only used for lf_modifier_apply_color_modification (vignetting) not for lf_modifier_apply_subpixel_geometry_distortion (distortion, which is the problematic one, and CA). > But in your case, you have to set the component roles to something > more simple, maybe LF_CR_1(LF_CR_INTENSITY). For the vignetting I did change them. > > They use Newton's method but I already tried to increase the > > iteration count. > > Newton's method is only used for the reverse (i.e. *creating* TCA). > For the correction of TCA, Lensfun simply computes a polynomial. Now I realize that I ran lensfun's sse version. So my changes to the normal version were not taken into account. Anyway. > Nice! I don'tlike tca_correct very much. However, it should be > possible -- at least as an option -- to use Lensfun't model for the > fitting, see > <http://lensfun.sourceforge.net/calibration-tutorial/lens-tca.html>. A (radial) degree 4 polynomial :-) Cheers, Stéphane ------------------------------------------------------------------------------ Learn Graph Databases - Download FREE O'Reilly Book "Graph Databases" is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech _______________________________________________ darktable-devel mailing list darktable-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/darktable-devel
