公开(公告)号：US11662805B2

公开(公告)日：2023-05-30

申请号：US17301655

申请日：2021-04-09

Applicant: Snap Inc.

Inventor： Georg Halmetschlager-Funek ,  Matthias Kalkgruber ,  Daniel Wolf ,  Jakob Zillner

IPC: G06F3/01 ,  G06F3/038 ,  H04L67/131

CPC classification number: G06F3/012 ,  G06F3/038 ,  H04L67/131 ,  G06F2203/0383

Abstract: A method for calibrating a visual-inertial tracking system is described. A device operates the visual-inertial tracking system without receiving a tracking request from a virtual object display application. In response to operating the visual-inertial tracking system, the device accesses sensor data from sensors at the device. The device identifies, based on the sensor data, a first calibration parameter value of the visual-inertial tracking system and stores the first calibration parameter value. The system detects a tracking request from the virtual object display application. In response to the tracking request, the system accesses the first calibration parameter value and determines a second calibration parameter value from the first calibration parameter value.

公开(公告)号：US20220377238A1

公开(公告)日：2022-11-24

申请号：US17521109

申请日：2021-11-08

Applicant: Snap Inc.

Inventor： Matthias Kalkgruber ,  Daniel Wolf

IPC: H04N5/232 ,  G06T5/00 ,  G06K9/46 ,  G06T7/20 ,  G06T3/40

Abstract: A method for mitigating motion blur in a visual-inertial tracking system is described. In one aspect, the method includes accessing a first image generated by an optical sensor of the visual tracking system, accessing a second image generated by the optical sensor of the visual tracking system, the second image following the first image, determining a first motion blur level of the first image, determining a second motion blur level of the second image, identifying a scale change between the first image and the second image, determining a first optimal scale level for the first image based on the first motion blur level and the scale change, and determining a second optimal scale level for the second image based on the second motion blur level and the scale change.