On lundi 27 mars 2017 15:56:29 CEST Graham White wrote: > Yes, a lot of high end lenses suffer from this too; you don't see it > with jpegs, because they have software correction applied in-camera, and > if you process RAW ouput with a mainstream RAW processor, then it's not > a problem either. I have a Panasonic Leica four thirds Summilux 25 > which has quite bad distortion unless you correct for it. We should > try to push to get dt users generating their own LensFun data > > Is there any software that will take a jpeg and a RAW of the same image > (one with lots of straight lines, presumably) and work out LensFun data?
I don't know of any software that uses a RAW with the corresponding jpeg to calculate lens corrections. But Hugin can determine the correction parameters from a few RAW files (or rather uncorrected jpeg/png/tiff files): http://hugin.sourceforge.net/tutorials/calibration/en.shtml or http://libregraphicsworld.org/blog/entry/creating-lens-distorsion-models-with-hugin-lens-calibrator or http://wilson.bronger.org/lens_calibration_tutorial/ Note that for a zoom you have to do the calibration at several focal lenghts. Remco ____________________________________________________________________________ darktable user mailing list to unsubscribe send a mail to [email protected]
