Am Mo, 18 Nov 2013 08:55:11 CET schrieb Torsten Bronger: > > http://friedmanarchives.blogspot.de/2012/10/the-most-distortion-ridden-zeiss-lens.html > > [...] > > > > After loading the night-shot sample from > > http://www.dkamera.de/testbericht/sony-cyber-shot-dsc-rx100/beispielaufnahmen.html > > : > > http://www.dkamera.de/media/testberichte/sony/cyber-shot-dsc-rx100/6_beispielaufnahmen/bilder/4_real_raw/03.ARW?download > > > > I see that the raw-file is a lot more distorted than the > > jpg-sample. > > > > Do I need a plugin? Can Darktable use the processing info in the > > raw-file? > > No, Darktable cannot make use of that. Probably there is no > industry standard for this, so every RAW processor has to implement > this for every camera vendor. And the ressources in FLOSS software > are limited. I don't even know whether these vendor-specific > extensions are public. But I'm afraid on the long term, FLOSS has > to learn how to use them.
I am pretty sure, that this is becoming more and more important, especially with small high end compact cameras and big and heavy lenses. IMHO, the question ist how important it is to set automatic values from the raw file with other things than lens-correction. The RX100 seems to be one of the 1st cameras, which does this. While lens correction is a must with such lenses, other things like white balance is not so important (IMHO), eg. But of course it would be nice, to have an optional setting, which shows the values the camera had used, when a jpg is created. Reading the net re this topic, I think other image processors did a reverse engineering to use the Sony settings. http://friedmanarchives.blogspot.de/2012/10/the-most-distortion-ridden-zeiss-lens.html It turns out that the RX-100 is not the only camera to do this - other high-end cameras have been doing it for years. Every single Hasselblad H-series body (those with a dedicated digital back) corrects for its 28mm f/4 lens this way, as has Phase One. So I am discussing of a feature which professionals use! > For the time being, you may take calibration pictures and upload > them at <http://wilson.bronger.org/calibration>. Read the > instructions carefully please. I think the lens is already calibrated: /usr/share/lensfun/compact-sony.xml ... <lens><maker>Sony</maker><model>RX100</model><focal value="10.4"/><mount>sonyRX100</mount><cropfactor>2.73</cropfactor><calibration><distortion focal="10.4" model="ptlens" a="0.00836" b="-0.05316" c="-0.02788"/><distortion focal="12.8" model="ptlens" a="0.00891" b="-0.06095" c="0.02196"/><distortion focal="14.9" model="ptlens" a="-0.00571" b="0.00909" c="-0.06449"/><distortion focal="16.6" model="ptlens" a="-0.00428" b="-0.01113" c="0.0042"/><distortion focal="19.1" model="ptlens" a="0.00523" b="-0.03743" c="0.03369"/><distortion focal="20.4" model="ptlens" a="-0.00312" b="-0.00368" c="-0.0036"/><distortion focal="23.3" model="ptlens" a="-0.00222" b="-0.00843" c="0.01379"/><distortion focal="25" model="ptlens" a="-0.00565" b="0.0037" c="0.00318"/><distortion focal="26.9" model="ptlens" a="-0.00245" b="-0.00859" c="0.01924"/><distortion focal="28.8" model="ptlens" a="-0.00842" b="0.0158" c="-0.01114"/><distortion focal="33.2" model="ptlens" a="-0.01065" b="0.02132" c="-0.01154"/><distortion focal="37.1" model="ptlens" a="0.00226" b="-0.02401" c="0.0397"/></calibration></lens> If I should upload samples, let me know. -- Αl ------------------------------------------------------------------------------ Shape the Mobile Experience: Free Subscription Software experts and developers: Be at the forefront of tech innovation. Intel(R) Software Adrenaline delivers strategic insight and game-changing conversations that shape the rapidly evolving mobile landscape. Sign up now. http://pubads.g.doubleclick.net/gampad/clk?id=63431311&iu=/4140/ostg.clktrk _______________________________________________ Darktable-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/darktable-users
