Patent ID: 11927586
Assignee: UNIVERSITEIT ANTWERPEN
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A method for inspection of an item, the method comprising:
acquiring a plurality of projection images of said item at a plurality of projection angles, using a radiation imaging device;
obtaining a tomographic reconstruction based on said plurality of projection images;
detecting a plurality of objects in said tomographic reconstruction, each of said plurality of objects having a generic shape described by a parametric three-dimensional numerical model, wherein said detecting comprises determining initial estimates of position and/or orientation of each of said plurality of objects and at least one geometrical parameter of said three-dimensional model for each of said plurality of objects;
iteratively refining said initial estimates by using a projection-matching approach, wherein said refining comprises, at each iteration, simulating forward projection images according to operating parameters of the radiation imaging device at said plurality of projection angles for at least one of the plurality of objects, and reducing a difference metric between acquired projection images and simulated forward projection images.