Hallöchen! Pierre Gérard writes:
> [...] > > With Darktable, are profiles mandatory to perform lens correction > ? Because AFAIK, raw data include manufacturer parameters to > correct geometry and vignetting, and LR does typically not need a > profile to correct that. AFAIK, currently, m43 and Fuji X embed lens correction parameters in RAW files. Unfortunately, these a closed standards. For m43s, I asked the "info" email address on the consortium's webpage, finding out that it's the webmaster's address, and he didn't know whom to contact. Then, I contacted Olympus directly, with no response. For Fuji X, I asked Fuji, and they told me that I'm not eligible for this information. There is some progress in reverse-engineering m43s but I have not looked at that so far. Being a Lensfun contributor, I'm interested in the mathematics of these standards. I would implement them in Lensfun. Then, Darktable would need to grow the ability to extract the data from the RAW and pass it to Lensfun, and the correction would work. But this is a rocky road ahead. Until then, we rely on test images to build own Lensfun profiles for m43 and Fuji X lenses (and all others, for that matter). Fortunately for you, vignetting test images are pretty easy to make, once the setup for it is ready. See http://wilson.bronger.org/calibration and <http://wilson.bronger.org/lens_calibration_tutorial/#id3>. Tschö, Torsten. -- Torsten Bronger Jabber ID: torsten.bron...@jabber.rwth-aachen.de ------------------------------------------------------------------------------ Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140 _______________________________________________ Darktable-users mailing list Darktable-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/darktable-users
