US 12,468,439 B1
Hand scale factor estimation from mobile interactions
Kai Zhou, Wiener Neudorf (AT); Xinrong Wei, Shanghai (CN); Xiao Li, Bellevue, WA (US); and Dunxu Hu, Los Angeles, CA (US)
Assigned to Snap Inc., Santa Monica, CA (US)
Filed by Snap Inc., Santa Monica, CA (US)
Filed on Aug. 5, 2024, as Appl. No. 18/794,934.
Int. Cl. G06F 3/0488 (2022.01)
CPC G06F 3/0488 (2013.01) 20 Claims
OG exemplary drawing
 
1. A method, comprising:
capturing, by one or more cameras of an extended Reality (XR) system, tracking data of a hand of a user as the user interacts with a touch surface of a mobile device operably connected to the XR system;
capturing, by the mobile device, a length of a reference line segment made by the user as the user interacts with the touch surface of the mobile device;
determining 3D distances between node pairs of the hand using the tracking data and the reference line segment; and
calculating a hand scale factor using the 3D distances between the node pairs.