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1. (WO2018223155) HAND TRACKING BASED ON ARTICULATED DISTANCE FIELD

Pub. No.:    WO/2018/223155    International Application No.:    PCT/US2018/044045
Publication Date: Fri Dec 07 00:59:59 CET 2018 International Filing Date: Sat Jul 28 01:59:59 CEST 2018
IPC: G06T 7/73
G06T 7/246
G06T 7/149
G06T 7/194
G06T 7/162
G06K 9/00
Applicants: GOOGLE LLC
Inventors: TAYLOR, Jonathan James
TANKOVICH, Vladimir
TANG, Danhang
KESKIN, Cem
KOWDLE, Adarsh Prakash Murthy
DAVIDSON, Philip L.
IZADI, Shahram
KIM, David
Title: HAND TRACKING BASED ON ARTICULATED DISTANCE FIELD
Abstract:
An electronic device (100) estimates a pose of a hand (120) by volumetrically deforming a signed distance field (330) using a skinned tetrahedral mesh (410) to locate a local minimum of an energy function (810), wherein the local minimum corresponds to the hand pose. The electronic device identifies a pose of the hand by fitting an implicit surface model (305) of a hand to the pixels (320) of a depth image (115) that correspond to the hand. The electronic device uses the skinned tetrahedral mesh to warp space from a base pose to a deformed pose to define an articulated signed distance field from which the hand tracking module derives candidate poses of the hand. The electronic device then minimizes the energy function based on the distance of each corresponding pixel to identify the candidate pose that most closely approximates the pose of the hand.