I am trying to create a production of a small object (close range photogrammetry) using cc. The object is ~ 12 cm x 4 cm , tall and narrow. I have taken images around the object (indoors no geo-referencing) with my camera rotated 90 degrees (portrait format) and pointing horizontally (parallel to the xy plane) to the object The resulting AT is extremely poor as shown
I took oblique images around the object, again in portrait format and the AT was better but still not acceptable as shown:
My camera was set to auto-rotate images and there was a warning that “photos have portrait rotation” I turned the auto-rotate function off and re took the images (as suggested by Bentley support), Images were landscape format with no warning but the AT was worse than before .
I would like to create models of statues/monuments that are tall but not wide so portrait images would be the best format. Has anyone come across this problem; any suggestion/help is much appreciated.
Further to Oto's comments .. shoot the object on a textured surface to give the AT algorithm more data. Shooting on a glass table doesn't give it any tie points.
The acquisition guide suggests newspaper for example .. but something with lots of irregular (but not repeating) patterns.
Hi James/Oto
Thanks for the response and suggestions. I tried removing extra images, sequence/loop mode, thin structure and high density, but results were no better. In fact, with high density no photos were oriented. I’ll try camera calibration and a different surface, but I don’t think this will help. I did a different model using landscape mode on a white background and the results were good. See below.
I think that it has something to do with the fact that the images are rotated, in portrait mode I'll keep you posted
Farouk
Farouk Rohoman