METHOD AND SYSTEM FOR COMPARING 3D MODELS

摘要

A method is disclosed allowing digital 3D models to be indexed, searched, and compared, and to display the results in a 3D space. The method comprises four complementary parts: displaying, comparing/searching, face reconciliation, and ranking results. Each of these parts can fit in one another or be used independently. The implementation of a process for searching/comparing 3D models based on descriptors at least partly related to faces requires a face reconciliation process (pairing of faces between 3D models).

主权项

1. A process for comparing a reference 3D model with a target 3D model to comparatively analyse 3D models, said process comprising:
providing at least one descriptor for each of said 3D models, said at least one descriptor comprising related geometrical characteristics which do not vary according to the modelling frame of reference and related geometrical characteristics which depend on said frame of reference; using the related geometrical characteristics which do not vary according to the frame of reference to pair parts of the reference 3D model with parts of the target 3D model; using the related geometrical characteristics which depend on the frame of reference for at least the parts which pairing is successful according to an acceptable error range, determining groups of transformations associating parts from the reference 3D model with parts of the target 3D model; and determining at least one group of similar transformations; wherein the similarities and differences between said reference 3D model and the target 3D model are identified, at least in part, by said group of similar transformations.