Patent · US Active

Method and apparatus for determining a plane of symmetry of a three-dimensional object

US7477776B2 · kind B2 · utility

24Cited by

6References

20Claims

0Family size

Assignee

Brainlab AG · DE

Inventors

Rainer Lachner · Munich, DE
Gregor Tuma · Munich, DE
Stefan Vilsmeier · Munich, DE

Key dates

Filing date	Mar 1, 2005
Grant date	Jan 13, 2009
Priority date	—
Expiry date	Jul 12, 2027

Classification

Technology area (CPC G)Physics
CPC primaryG06T2219/008
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

A method and apparatus for determining the position of a plane of symmetry of a three-dimensional object from at least two two-dimensional mappings, wherein the mappings are obtained from different directions. At least one characteristic line of the three-dimensional object is determined in one of the two-dimensional mappings, and at least one of the two two-dimensional mappings is morphed. The at least one characteristic line is transferred onto the other two-dimensional mapping, and the characteristic lines from the two-dimensional mappings are back-projected to obtain a three-dimensional curve corresponding to the characteristic lines. A plane of symmetry of the object is ascertained from the course of the three-dimensional curve.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.