The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 05, 2026
Filed:
May. 21, 2024
Snap Inc., Santa Monica, CA (US);
Georg Halmetschlager-Funek, Vienna, AT;
Nikolaj Kuntner, Vienna, AT;
Simon Schreiberhuber, Vienna, AT;
SNAP INC, Santa Monica, CA (US);
Abstract
Embodiments of the present invention relate to techniques for managing keyframe data in a Simultaneous Localization and Mapping (SLAM) system of an Augmented Reality (AR) device. The method involves obtaining a plurality of keyframes, each linked to pose data comprising spatial and orientation data derived from raw data captured by sensors. The pose data for each keyframe is quantized according to predefined parameters, creating a structured pose grid of quantized cells. The technique includes analyzing the quantized pose data to identify excess keyframes that exceed a predetermined threshold within these cells. Redundant keyframes are pruned from memory, optimizing the SLAM system's efficiency by reducing computational load and memory usage. This selective pruning process ensures that the AR device retains a comprehensive and accurate environmental map while operating within the constraints of limited system resources.