US 12,445,589 B2
Calibration method, apparatus, device and system for head-mounted display device, and storage medium
Changhe Yu, Weifang (CN); and Zhixing Shen, Weifang (CN)
Assigned to GOERTEK INC., Weifang (CN)
Filed by GOERTEK INC., Weifang (CN)
Filed on Apr. 18, 2024, as Appl. No. 18/638,840.
Application 18/638,840 is a continuation of application No. PCT/CN2021/135587, filed on Dec. 6, 2021.
Claims priority of application No. 202111434450.8 (CN), filed on Nov. 29, 2021.
Prior Publication US 2024/0267505 A1, Aug. 8, 2024
Int. Cl. H04N 13/327 (2018.01); H04N 13/00 (2018.01); H04N 13/344 (2018.01)
CPC H04N 13/327 (2018.05) [H04N 13/344 (2018.05); H04N 2013/0081 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A calibration method for a head-mounted display device, comprising:
obtaining a three dimensional (3D) point coordinate corresponding to a target calibration graphic card image; wherein the target calibration graphic card image comprises an image of a calibration graphic card, and the target calibration graphic card image is an image captured by a positioning assembly in response to that a preset image of the calibration graphic card projected by an optical engine on a see-through display coincides with a real calibration graphic card under a perspective of a wearer of the head-mounted display device;
determining a corresponding relationship between a projection coordinate system of the optical engine and a coordinate system of the positioning assembly according to the 3D point coordinate; and
calibrating display content of the head-mounted display device according to the corresponding relationship,
wherein in response to that the corresponding relationship is a 3*4 projection matrix, the determining the corresponding relationship between the projection coordinate system of the optical engine and the coordinate system of the positioning assembly according to the 3D point coordinate comprises:
calculating the 3*4 projection matrix through singular value decomposition according to the 3D point coordinate.