| 摘要 |
The invention notably relates to a computer-implemented method for querying a database that comprises 3D modeled objects that represent mechanical parts, comprising the steps of providing (S 1) a query that includes a likeness criterion relative to the value of a predetermined shape descriptor for an input 3D modeled object; returning (S2), as results of the query, respective 3D modeled objects of the database based on an extent to which the value of the predetermined shape descriptor for the respective 3D modeled object respects the likeness criterion. The value of the predetermined shape descriptor for a respective 3D modeled object includes a set of axis systems that are trihedral. The likeness increasingly depends on an extent to which sets of axis systems match each other modulo a same similarity transformation. Such a method improves the querying of a database that comprises 3D modeled objects that represent mechanical parts. |
