Method for realigning a three-dimensional representation of an object on the object itself and device for assisting navigation within an object

FR3153922B1Active Publication Date: 2025-10-17COLLIN & CO
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Patent Information

Application Number
FR2023010611
Authority / Receiving Office
FR · FR
Patent Type
Patents
Current Assignee / Owner
Filing Date
2023-10-04
Publication Date
2025-10-17
Estimated Expiration
2043-10-04

AI Technical Summary

Technical Problem

Existing three-dimensional revival processes struggle to achieve satisfactory results on complex and small objects, such as the human or animal ear, due to their intricate bone structures and dimensions, which hinder accurate surface reconstruction.

Method used

A three-dimensional refurbishment process that records a three-dimensional representation of an object, extracts its surface, and re-renders it on the object itself using an ancillary of solidarity and a pointer. This process includes a prior treatment to distinguish internal and external surfaces, selecting external viewpoints, and removing internal surfaces based on invisibility criteria from these viewpoints.

Benefits of technology

The process simplifies the surface representation by eliminating internal structures, enabling a satisfactory three-dimensional revival even in challenging conditions like otology, and improving revival quality in less complex scenarios like rhinology or other non-medical applications.

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Abstract

This registration method comprises a recording (100, 126) of a three-dimensional representation of an object (12), an extraction (104-116, 130) of a surface of the object in this representation and a surface registration (120, 122, 132) of this representation on the object. The surface registration comprises a recording (120) of locations of surface points (Ps) on the surface of the object in a reference system linked to a referencing ancillary (24) and a calculation (122, 132) of the surface registration from the extracted surface of the object and this recording (120) of locations of surface points. The surface extraction comprises a pre-processing (104, 130) to distinguish at least one internal surface and one external surface of the object, a selection (106-114, 130) of at least one point of view external to the object, and a deletion (116, 130) of said at least one internal surface on an invisibility criterion from each selected point of view.Figure for abstract: Fig. 7.
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