Method, device, and computer program for virtually adjusting a spectacle frame

US11215845B2 · kind B2 · utility

Assignee

• Carl Zeiss Vision International GmbH · DE

Inventors

• Oliver Schwarz · Rainau, DE
• Ivo Ihrke · Adelmannsfelden, DE

Key dates

• Filing date: Nov 30, 2019
• Grant date: Jan 4, 2022
• Expiry date: Nov 30, 2039

Classification

• Technology area (CPC G): Physics
• CPC primary: G06T2219/2004
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A virtual try-on process for spectacles includes an approximate positioning and a fine positioning of a spectacle frame on a head of a user. Provided for this purpose are 3D models of the head and the spectacle frame, as well as head metadata based on the model of the head and frame metadata based on the model of the frame. The head metadata contains placement information, in particular a placement point, which can be used for the approximate positioning of the spectacle frame on the head, and/or a placement region which describes a region of the earpiece part of the frame for placement on the ears of the head. A rapid and relatively simple computational positioning of the spectacle frame on the head and a more accurate positioning using a subsequent precise adjustment can be achieved with the aid of the metadata.