Thank you all. We don't yet know what is the best sort of content. We do know that radial lines, that pass through the center of the image, are useless for calibration, the best thing is tangential lines at various distances from center. Clarity continuity, and length of edges is important. Having a big number of edges in each picture is not, if you can give us several pictures from the same lens at the same FL (can be different subjects). For less well known cameras, please mention if the lens is fixed or demountable.
Subjects like the side of a building with strong surface lines, or a tall iron fence from close up would be good. I myself am taking pictures of some black threads taped to a white wall. The present program rejects "corner" points and short line segments, brick walls are not good (someday they should be, though). Zoom lenses at different focal lengths are cool, so long as the F.L. is reported or in the EXIF. Habi, thank you for your quick action. I was not expecting iPhone pictures, but they are welcone since you know the chip size. Regards, Tom On Jul 27, 4:13 am, David Haberthür <david.haberth...@gmail.com> wrote: > Hello Tom (and Tim). > > On Mon, Jul 27, 2009 at 01:11, Tom Sharpless <tksharpl...@gmail.com> wrote: > > > HI All > > > Tim Nugent's summer of code project, to develop a program for > > calibrating lenses by the straight line method, has almost reached the > > point where lots of test data are needed. So as his mentor, I am > > issuing a call for pictures to test it with. > > Great to hear about progress! > > I'm uploading a set of images to your FTP-site now.There was no > "lenscal"-folder, so I've generated one myself. > > Inside this folder I made a folder for my nickname and inside this, a folder > for three "cameras" and three lenses > The folders are > - dsc-t3, which contains images shot with sony dsc-t3 > (http://www.google.ch/search?q=dsc-t3, with a 1/2,4" 5MP RGB-CCD-Chip) > - iphone, contains some images made with my first generation iPhone > (fixed-focus 2.0MP, that's pretty much all I know, but I've shot some > panoramas with it) > - nikond90nikkor10-5mm - This and the two following folders are three > lenses on my Nikon D80, with a 10MP CCD and a Standard DX sensor with a size > of 23.6x15.8mm. These images are shot with a "af > fisheye nikkor 10.5mm 1:2.8 G ED", which is explained > here:http://www.kenrockwell.com/nikon/105fe.htm > - nikond80nikkor50mm - Nikon D80 with a very robust > "af nikkor 50mm 1:1.8 D", explained > here:http://www.kenrockwell.com/nikon/5018daf.htm > - nikond80zenitar - Nikon D80 with an even more robust "mc > zenitar-n2,8/16", explained > here:http://www.kenrockwell.com/zenit/zenitar-16mm.htm > > Let me know if the images are along the lines (pun intended :) of what you > and Tim expect as test-case. If not, I could take more images (with the > Nikkor Fisheye only until Friday, since it's a lens I borrowed from a > friend...) > > Cheers from Switzerland > Habi --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "hugin and other free panoramic software" group. A list of frequently asked questions is available at: http://wiki.panotools.org/Hugin_FAQ To post to this group, send email to hugin-ptx@googlegroups.com To unsubscribe from this group, send email to hugin-ptx-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/hugin-ptx -~----------~----~----~----~------~----~------~--~---
