On 6 Dez., 11:29, Olivier Croquette <[email protected]> wrote: > Thanks for the numerous answers. I didn't know Bruno's tutorial yet, > so I tried to follow it. I came a bit further, but it actually didn't > solve this unusual problem. To make it clear what it is, I have put > some sample maps online.
Thanks for sharing. I had a look at your data. One thing straight away: you have Z-values. You don't want them, since the scale of all the images is the same, and Z values refer to the distance from the mosaic plane. Just set Z to zero. The only things you need to optimize are roll, X and Y. With this type of content, you will have to set the control points manually, but if the drawings are precise, you won't need to many. If the drawings were perfect, three would be perfectly enough. Stitching this, with the input images' projection and the panorama projection set to rectilinear, should give you a result where the input images aren't distorted at all, just nudged into place. You will have to use masking, though, to remove parts of the black background and the image boundary lines, because the stitcher may put them into the result rather than the geographic content in other images that happens to be in the same 'place'. Finally, I'd like to ask you how sure you are that the errors of 'several metres' you've observed after georeferncing the data with JOSM might not be in the source material? I suppose these are handdrawn maps scanned in; a few metres are easily explainable by artifacts introduced somewhere along the line - think of it: surveying, projecting, drawing, ageing of the maps, warping of the paper due to humidity fluctuations, scanning shear... - and finally, human error. All introduce errors, which may well end up amounting to a few metres. Keep in mind that the stitching process is another source of errors. To use the data as source for OSM, I think you'd be well advised not to stitch the maps with hugin, but to georeference the individual sheets as best as you can, be it in JOSM or QGIS. with regards Kay -- 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 [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/hugin-ptx
