US 11,942,008 B2
Smart tracking-based projection method and system
Xiang Li, Shenzhen (CN); Wenxiang Li, Shenzhen (CN); Mingnei Ding, Shenzhen (CN); Steve Yeung, Hong Kong (CN); and Zhiqiang Gao, Hong Kong (CN)
Assigned to IVIEW DISPLAYS (SHENZHEN) COMPANY LTD., Shenzhen (CN)
Filed by IVIEW DISPLAYS (SHENZHEN) COMPANY LTD., Shenzhen (CN)
Filed on Dec. 7, 2021, as Appl. No. 17/543,943.
Application 17/543,943 is a continuation of application No. PCT/CN2021/082412, filed on Mar. 23, 2021.
Claims priority of application No. 202011592014.9 (CN), filed on Dec. 29, 2020.
Prior Publication US 2022/0208038 A1, Jun. 30, 2022
Int. Cl. H04N 9/31 (2006.01); G06T 7/20 (2017.01); G06T 7/70 (2017.01); G06T 17/00 (2006.01); G09G 3/00 (2006.01)
CPC G09G 3/002 (2013.01) [G06T 7/20 (2013.01); G06T 7/70 (2017.01); G06T 17/00 (2013.01); H04N 9/317 (2013.01); H04N 9/3185 (2013.01); G09G 2340/0492 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A smart tracking-based projection method, applicable to a smart tracking-based projection system, the smart tracking-based projection system comprising a spatial information capturing unit, a target tracking unit, a projection unit, and a drive unit; wherein the method comprises:
acquiring information of a real space of the spatial information capturing unit, constructing a 3D model of the real space, and acquiring first position information of a projection picture projected by the projection unit;
acquiring target image information of the target tracking unit, and acquiring second position information of a tracking target based on the target image information;
acquiring a target projection region based on the 3D model and the second position information;
acquiring, based on the target projection region, rotation information desired by the projection unit; and
controlling, based on the rotation information, the drive unit to operate such that the projection picture reaches the target projection region;
the method further comprising:
acquiring a stretching variation of the projection picture based on the rotation information;
acquiring a stretching correction coefficient of the projection picture based on the stretching variation; and
correcting the projection picture based on the stretching correction coefficient.