US 11,882,387 B2
Duration and potential region of interest for suspicious activities
Hui Lam Ong, Singapore (SG); Satoshi Yamazaki, Singapore (SG); Hong Yen Ong, Singapore (SG); and Wei Jian Peh, Singapore (SG)
Assigned to NEC CORPORATION, Tokyo (JP)
Appl. No. 17/273,384
Filed by NEC Corporation, Tokyo (JP)
PCT Filed Aug. 20, 2019, PCT No. PCT/JP2019/032378
§ 371(c)(1), (2) Date Mar. 4, 2021,
PCT Pub. No. WO2020/050002, PCT Pub. Date Mar. 12, 2020.
Claims priority of application No. 10201807675T (SG), filed on Sep. 6, 2018.
Prior Publication US 2021/0334572 A1, Oct. 28, 2021
Int. Cl. H04N 7/18 (2006.01); G06V 10/84 (2022.01); G06V 20/52 (2022.01); G06V 40/16 (2022.01)
CPC H04N 7/181 (2013.01) [G06V 10/84 (2022.01); G06V 20/52 (2022.01); G06V 40/16 (2022.01); G06V 40/161 (2022.01); G06V 40/171 (2022.01); G06V 40/172 (2022.01)] 20 Claims
OG exemplary drawing
 
1. A method for determining a duration and at least a region of interest for managing an event, the method comprising:
determining a set of coordinates each for two or more appearances of a target subject within a sequence of images, the set of coordinates of the two or more appearances of the target subject defining a first path;
determining a set of coordinates each for two or more appearances of a related subject within a sequence of images, the related subject relating to the target subject, the set of coordinates of the two or more appearances of the related subject defining a second path;
determining one or more minimum distances between the first path and the second path so as to determine at least a region of interest;
determining a timestamp of a first appearance and a timestamp of a last appearance of the target subject; and
determining a timestamp of a first appearance and a timestamp of a last appearance of the related subject when it is determined that at least one of the one or more minimum distances between the first path and the second.