On Tuesday, 4 February 2025 at 9:52:08 +0000, Bruno Postle wrote: > Hi Greg, these pictures stitch ok.
Thanks! But your reply poses more questions than it answers. > ..but you really need to centre the lens on the tripod as there is a > lot of parallax error in this scene. Yes. This was a first attempt, and I wasn't expecting a perfect stitch. But I also wasn't expecting the problems I had. > In this situation you should only use control points on the furthest > features, and ideally only features that are near the likely stitch > seam (automating this would be a useful Hugin feature). Does this mean that you set the control points manually? > The photos are circular fisheye, so you need to check that there is > a circular crop on each of the photos, How do I do that? You've seen what the images look like; should anything else be done? > this is the cause of the 'fleur-de-lis' artefact. My guess is that you loaded the images differently. I've been doing it via the fast panorama preview, and it was always only the second image that was affected in this way. It doesn't happen if I load from the main window, and the display of the fleur-de-lis pattern depends on where the cursor is positioned in the fast panorama preview window. > Attached, a PTO project and stitched output, hope this helps. Thanks. Yes, this works for me, but I still don't know how to repeat it. I've tried using the main window, and I discover that Hugin decides that it's a circular fisheye—is this heuristics? But it also changes the focal length from 4 mm to 2.903 mm, which sounds like a bug. That means that if I manually enter the focal length (from versions without Exif data, for example), it gets incorrect information. At 4 mm the calculated angle is 185.92°, and at 2.903 mm it's 256.18°. According to my angle of view program, the values should be 247.88° and 341.45°, in each case obviously including the black borders. So: I think we have at least two bugs here, the fleur-de-lis pattern for the second image in the fast panorama preview and the incorrect angular calculation. Greg -- Sent from my desktop computer. Finger [email protected] for PGP public key. See complete headers for address and phone numbers. This message is digitally signed. If your Microsoft mail program reports problems, please read http://lemis.com/broken-MUA.php -- A list of frequently asked questions is available at: http://wiki.panotools.org/Hugin_FAQ --- You received this message because you are subscribed to the Google Groups "hugin and other free panoramic software" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/d/msgid/hugin-ptx/Z6Le7lJi2PW35xZa%40hydra.lemis.com.
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