Hi, I don't want to be annoying, but I would like to raise your attention towards this issue, as it renders lensfun in its recent versions unusable. I also wonder, how this issue didn't get raised earlier, but that might even be because other lenses aren't distorting as much as mine. Did anyone already try to replicate this problem (verify the provided distortion parameters against the calibration image, open the calibration image with a lensfun version prior to 41fa7a vs. a newer/the latest version)? Would you recommend to use version f8f0eb for the time being, or have there been significant bug-fixes or improvements during the past 2.5 years, which make those old versions a bad choice? Let me also add, that I had not only used ufraw in the beginning (when testing with packaged lensfun 0.3.2), but also with darktable - with the same poor undistortion results. Thanks for your attention
Hartmut Hartmut Knaack schrieb am 16.07.2016 um 01:17: > Appearance > ========== > Following Torsten Brongers calibration guide, I took Raw photos of a modern > building with my Canon Powershot SX160 IS using CHDK. The TIFF files created > by calibrate.py were processed with the method > described in the vimeo tutorial. This way, I created my custom lensfun.xml > file [2]. When opening one of the Raw photos [1] in ufraw and selecting my > camera model, it is visible that the image is insufficiently undistorted[3]. > Hugin however does a proper undistortion, when provided with the a, b and c > parameter from lensfun.xml. By trying out some older versions of lensfun, it > appeared that versions prior to January 1st 2014 were undistorted properly > [4]. > > Commit of introduction > ====================== > 41fa7a (Patch #3532 Fix vignetting in case of non-matching crop factors) > > Details > ======= > The commit is missing a proper message, explaining the details of the > changes. I don't see the relation between the patch title and the code > changes. > > References > ========== > [1]http://www.file-upload.net/download-11769030/IMG_0803.DNG.html > [2]http://www.file-upload.net/download-11769015/lensfun.xml.html > [3]http://www.file-upload.net/download-11769018/ufraw-lensfun_41fa7a.png.html > [4]http://www.file-upload.net/download-11769031/ufraw-lensfun_f8f0eb.png.html > > ------------------------------------------------------------------------------ > What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic > patterns at an interface-level. Reveals which users, apps, and protocols are > consuming the most bandwidth. Provides multi-vendor support for NetFlow, > J-Flow, sFlow and other flows. Make informed decisions using capacity planning > reports.http://sdm.link/zohodev2dev > _______________________________________________ > Lensfun-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/lensfun-users > ------------------------------------------------------------------------------ _______________________________________________ Lensfun-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/lensfun-users
