reconstruction

the .pcd file format allows for fields to be extended. this means it can neatly hold data about the label or object of a point. this can be very handy for ML tasks. However, the open3d file io does not appear to be able to read other fields other than the xyz, rgb, normals etc . I haven't been able to find where in the open3d structure the code for the file io pcd loading is implemented to att

According to the docs, filters are not implemented for FBP. However, TomoPy does not raise an error when you try to pass filter_name or filter_par with algorithm='fbp'. This would explain why, in my tests, choosing various filters for FBP did not change the reconstruction quality.

This definitely needs to be fixed