This is another posting in the Libre Graphics Meeting series, and another on LensFun, of which I’ve already written before.
LensFun as idea — a library to provide means to fix distortions and aberrations that lenses apply to captured photos — and a set of requirements was born two years ago at Libre Graphics Meeting in Montreal. As a real code it was born a bit later — you can read interview with Andrew Zabolotny by Joel Cornuz for details.
At this point we have a sophisticated implementation of LensFun in UFRaw, a quite simplistic yet working implementation in digiKam and somewhat forgotten test implementation in Rawstudio which hasn’t made its way to users yet — last thing I heard is Anders K. will probably do it soon now that Rawstudio has plug-in architecture. (And if he doesn’t, I will feel justified to renew my torturing skills that I got during my KGB secret agent course years ago :))
Currently LensFun suffers from lack of a very much up to date lens/camera database. New lenses pop up every few months, but most of its data is coming from the last available open ptlens database (before it went proprietary). So I have an idea. If you happen to have lenses unsupported by LensFun and you are planning to come to LGM, bring them, and we’ll do a calibration session. The walls of École Polytechnique — our old/new venue — have pretty straight lines to rely on, and at least one pano head with leveller will be available :)
By the way, you can start registering for the conference now! And if you would love to do a talk on free graphics software, do get in touch — the program is still in the works :)
That’s a cool idea. But I happen to think that a lens-calibration tool which makes calibration easy would be a LOT more valuable.
Heck, I’d calibrate my own lenses If I knew on how to do it.
Really… make calibration accessible, and the rest fill follow
Benjamin, the calibration tool is called hugin ;)
http://hugin.sourceforge.net/tutorials/calibration/en.shtml
Alexandre, geometric corrections are not the one and only thing required to be corrected. Chromatic aberrations, lens color shift and vignetting are outside the scope of hugin.
Sure, but that’s a start :)
A working lensfun plugin has been added to Rawstudio. “All it needs” is some thoughts about how we should use it. We can detect the Camera from EXIF, but finding out which lens has been used is the problem. This being that we don’t want a large list of cameras and lenses to choose from, this has to be identified automatically.