For the past year, our lab has been working on creating a 3D model of a large needle. The object is on a grid-marked, black turntable against a white or black backdrop. We have gone through 7 (soon to be 8) different attempts at running photo batches through Photoscan Pro, but all of the models we've produced have ended up either jumbled on the software, or with one or both ends hopelessly blurred and fused with the background.
We have tried:
-propping up the needle
-taking photographs of the front and back to merge later
-adding object markers to the field to help the program orient points
Does anyone have tips on how to successfully use photogrammetry to produce a model of this object? It seems that the main problem is managing to get the entire object into focus at once.