US 12,137,304 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)
Filed by NEC Corporation, Tokyo (JP)
Filed on Aug. 9, 2023, as Appl. No. 18/232,258.
Application 18/232,258 is a continuation of application No. 17/273,384, granted, now 11,882,387, previously published as PCT/JP2019/032378, filed on Aug. 20, 2019.
Claims priority of application No. 10201807675T (SG), filed on Sep. 6, 2018.
Prior Publication US 2023/0388456 A1, Nov. 30, 2023
This patent is subject to a terminal disclaimer.
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)] 17 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a memory storing instructions; and
a processor connected to the memory and configured to execute the instructions to:
receive a plurality of image inputs;
identify one or more of a characteristic information based on a facial information from each of the plurality of image inputs;
determine if each of the one or more identified characteristic information is likely to correspond to a target subject characteristic information which was stored in a database;
retrieve one or more image inputs and their corresponding location coordinates and timestamps relating to the characteristic information that is likely to correspond to the target subject characteristic information upon the determination that at least one identified characteristic information is likely to correspond to a target subject characteristic information;
determine one or more related subjects that appears within a pre-determined search period;
construct paths for the target subject and each of the related subjects for the appearances by connecting the respective coordinates of the image inputs coordinates;
find the minimum distances between the target subject path and each of the related subject path that satisfies a pre-determined minimum distance threshold so as to determine which are the one or more minimum points on the respective paths that are closest to the sections that form the respective minimum distances;
connect the one or more minimum points to determine the potential region of interest of the co-appearances; and
determine, in response to determining that there is at least one minimum distance between the target subject path and each of the related subject path that satisfies the pre-determined minimum distance threshold, an earliest timestamp and a last timestamp from the determined timestamps of the first and last appearances of the target subject and each of the related subject so as to determine the duration of interest of the respective co-appearances.