I would like to align the top and bottom of an artifact, in this case a pot with three legs, to create a full 3D model. The surface has a painted design plus cracks, and the legs are modeled, so the object is not at all a regular or featureless surface.
Rather than create masks (too time consuming for production purposes), my idea was to take the object upside down (42 photos) and create a model, than do the same with the pot right side up, 45 photos. In both cases the photos from the two chunks aligned very well, so I had one chunk resting upright on a flat surface, the other inverted on the flat surface. I made sure to take a circle of photos around the side in both cases.
I had hope that by removing both the dense and sparse clouds of the support layer (the flat surface), plus a bit more, the two chunks would align. They aligned, but with the legs from the inverted model pointing up, and those from the normal model pointing down (see attached).
Can anyone explain the error of my ways and why Photoscan will not align the two correctly (or even why it will align it the way it does!). I thought alignment was performed on the point cloud.
Thanks