Positioning method, positioning apparatus, and computer-program product

US11340074B2 · kind B2 · utility

Assignee

• BOE Technology Group Co., Ltd. · CN

Inventors

• Cheng Liu · Beijing, CN
• Changlin Leng · Beijing, CN

Key dates

• Filing date: Sep 25, 2018
• Grant date: May 24, 2022
• Expiry date: May 18, 2040

Classification

• Technology area (CPC G): Physics
• CPC primary: G01C25/00
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A positioning method includes determining a positioning coordinate (x101,y101,z101) of a positioning device in a scene coordinate system o-xyz based on one or a combination of (1) an estimated coordinate (x1,y1,z1) of the positioning device in the scene coordinate system o-xyz; and (2) positions of image objects of one or more reference illumination sources of a plurality of illumination sources in a scene image, fixed coordinate positions (x0, y0, z0) of the one or more reference illumination sources of the plurality of illumination sources in the scene coordinate system o-xyz, and an included angle α between an x-axis of the scene coordinate system o-xyz and an x′-axis of a positioning device coordinate system o′-x′y′z′.