Hugin lens calibrator doesn't like checkerboards, but hugin likes them very much, they can even be used to calculate vignetting :)
I wonder if I could generate an ideal checkerboard, then try to have hugin transform the captured one to the ideal. Maybe, once I get the parameters worked out, I should try doing a real panorama. I wish there were a way to just do a flat field though. > On Apr 8, 2018, at 6:11 PM, Robin Kramer <kodr...@gmail.com> wrote: > > Hi All, > > I wanted to try to use LCP Creator with RawTherapee, however it doesn't > support manual lenses for chromatic aberration, and I didn't realize that > lensfun was supported by rawtherapee, its kind of hidden. > > However, I put together a nice checkerboard chart. I tried using it with > hugin's calibrate lens and it didn't quite work. I also tried some grid > lines from my go board no luck. > > I wonder what would be a good calibration chart for hugin's lens calibrate > GUI? Concentric rectangles, but I could find any ready-to-go chart out there. > > I got to thinking about even concentric rectangles might not be so great, > because it assumes that you have straight lines in the image to find in the > first place. > > I tried the lcp convert to convert my lcp files however, it gets stuck in an > endless loop and observably it seems like a half baked utility to convert an > entire database, not a one by one lens conversion utility. > > Any ideas for a calibration chart, a way to use checker boards, or a > conversion algorithm( I think I would be relatively happy with a guide on how > to manually copy numbers from one xml to another for my collection of lenses.) > > In the past I used those charts from Bob Atkins, but I had to run the > algorithm a bunch of times, and it was kind of a gestimate in the end, most > of the lines were just noise. > > Sincerely yours, > > Robin ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Lensfun-users mailing list Lensfun-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lensfun-users
