Patent · US Active

Computer-implemented method for determining centration parameters

US11480816B2 · kind B2 · utility

0Cited by

4References

28Claims

0Family size

Assignees

Carl Zeiss Vision International GmbH · DE
Carl Zeiss AG · DE

Inventors

Claudia Nieuwenhuis · Aalen, DE
Oliver Schwarz · Rainau, DE

Key dates

Filing date	Nov 27, 2020
Grant date	Oct 25, 2022
Priority date	—
Expiry date	Nov 27, 2040

Classification

Technology area (CPC G)Physics
CPC primaryG06T2207/30201
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

Centration parameters for fitting spectacle lenses to a predetermined spectacle frame and to the head of a subject are determined with a computer-implemented method. At least two calibrated images, recorded from different recording directions, of the head of the subject wearing the spectacle frame are provided, wherein geometric parameters are established by geometric position determination. The geometric parameters describe the position of the eyes and the geometry of the spectacle frame, and the centration parameters are calculated from the geometric parameters. Further, a three-dimensional model for the spectacle lenses, which are to be received in the spectacle frame, is fitted to the geometry of the geometric parameters that describe the geometry of the spectacle frame.

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