-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 Well, most likely it does not make much sense to calibrate crop lenses on full frame cameras (there are some exceptional crop lenses which are also useful on full frame). And for personal usage the only constraint is to calibrate with the biggest sensor used with this lens. In this case the calibration results are of course not applicable to cameras with a larger sensor.
Regards, Markus Am 17.06.2014 11:36, schrieb Daniel Schury: > Short question to this: Is it really useful to do the calibration > fitting with a crop camera? Because some image area is missing for > full frame cameras, the data may be not that good for them? > > Freundliche Grüße Daniel Schury > > Am 17.06.2014 11:32, schrieb Robert William Hutton: >> On 13/06/14 23:06, Leonard Evens wrote: >>> I had previously calibrated a lens using the program hugin, >>> following the video by Torsten Bronger at >>> http://vimeo.com/51999287 >>> >>> I need to do the same for a new lens on a new camera, so to >>> remind myself how to do it, I tried doing the old lens again >>> using hugin. Unfortunately, the hugin interface has changed >>> radically, and it is not clear how to do it. >>> >>> Does anyone know how to do this? > >> There are two tricks you need to know about in the new versions >> of Hugin: how to make the Optimiser tab appear, and how to select >> the "a", "b" and "c" parameters for optimisation. Here's how: > >> * Open Hugin Panorama Creator. I'm using the one on Ubuntu 14.04 >> which is version 2013.0.0. * On the Photos tab, right click in >> the file list (currently just the blank white area) and do "Add >> individual images...", then select your image. * Type in your >> focal length multiplier (1.0 for full frame, 1.6 for Canon crop >> cameras, 1.5 for Nikon crop cameras, etc.) and click OK. * Under >> Optimise at the bottom of the screen, change the Geometric option >> to "Custom Parameters". Note that the Optimiser tab will then >> appear at the top of the screen. * On the Control Points tab, add >> your control points as described in Torsten's video. * On the >> Optimiser tab, under Lens Parameters, click the triangle next to >> the "Lens 0" item. This will show your image file name. Next to >> the image file name, ctrl-click the three zeros under "a", "b" >> and "c". They will become bold and underlined, indicating that >> they are selected for optimisation. * Click the Optimise now! >> button in the top right. * Once the optimisation is complete, the >> "a", "b" and "c" parameters will be filled in with the real >> values, but they're low-precision and you can't copy-paste them >> from that screen, so right click on the the image file name and >> do "Edit image variables...". * From the Image variables screen, >> copy and paste the distortion (a), barrel (b) and distortion (c) >> values. > >> Regards, > >> Rob > >> ------------------------------------------------------------------------------ >> >> HPCC Systems Open Source Big Data Platform from LexisNexis Risk Solutions >> Find What Matters Most in Your Big Data with HPCC Systems Open >> Source. Fast. Scalable. Simple. Ideal for Dirty Data. Leverages >> Graph Analysis for Fast Processing & Easy Data Exploration >> http://p.sf.net/sfu/hpccsystems >> _______________________________________________ Darktable-users >> mailing list [email protected] >> https://lists.sourceforge.net/lists/listinfo/darktable-users > > > > ------------------------------------------------------------------------------ > > HPCC Systems Open Source Big Data Platform from LexisNexis Risk Solutions > Find What Matters Most in Your Big Data with HPCC Systems Open > Source. Fast. Scalable. Simple. Ideal for Dirty Data. Leverages > Graph Analysis for Fast Processing & Easy Data Exploration > http://p.sf.net/sfu/hpccsystems > _______________________________________________ Darktable-users > mailing list [email protected] > https://lists.sourceforge.net/lists/listinfo/darktable-users > -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBCgAGBQJToA6OAAoJEA5rngfdPVJD9IUP/0MfXo3y2znAcBTb1lz+IBoq /Bbr3a0AJWOwSkVyzT70uZjgkdIUqfuDrbmmzYVmOuz3fvucfn5TdP5eevov/kwG X4C8gF1kKFely9t+UNuIFpjbBPGz4SN/ZsStQ46uNRA2cOOAR8qCx2AoaC15EmUD QiiQQ+/Y8NRg9bE6UfWvzOMvSS1Rb/aAHpv8mDHh/d1DCHP/h2Wbxw3P9heScIbm Z8fw8Ko3dbnmnnJwVvdkxeotdgULVSlIUMmClfm+LT7IJnbXmr16z0EKwrMJbz8l xy4dKVUVnArTOKtHPSzE3oOlh/bT2tNdAksLFrwERQVcCFgDcA6gpvWq/b/MPTqj sUODn3YYAGYYEgl5MK9gq5tTHhiIA4FTymdwsBbHyjzxE+F9uktVisD3Yo+VbV1t 0XjOFG1p8pWsHltioMbjHcNcjJZ5yKdIUVKMG5oqTAb5rfnBPqv83/uc0qD4+ULJ eZNNgE1jFX3NG36EJhUCgG3qoPwH6pWrFjOP+bwIZ2qrw8ax5O2rR/4IIkttxb07 YKvyd9hUToEJbRJAK356OB5U/qlFfvWGubWdblSChdmEJU/YUuR7Te4Vt0IYvBPa ar4vWsV5RSkKgWrkAglhIEsMOusEjhQ2bldGF4Js5uHJ0MIRXpJqSDVNZHqWPvnw QVv3/ucskV3xbSzPTUWY =trA6 -----END PGP SIGNATURE----- ------------------------------------------------------------------------------ HPCC Systems Open Source Big Data Platform from LexisNexis Risk Solutions Find What Matters Most in Your Big Data with HPCC Systems Open Source. Fast. Scalable. Simple. Ideal for Dirty Data. Leverages Graph Analysis for Fast Processing & Easy Data Exploration http://p.sf.net/sfu/hpccsystems _______________________________________________ Darktable-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/darktable-users
