US 12,079,999 B2
Object tracking device, object tracking method, and recording medium
Hayato Itsumi, Tokyo (JP); and Masaharu Morimoto, Tokyo (JP)
Assigned to NEC CORPORATION, Tokyo (JP)
Appl. No. 17/437,218
Filed by NEC Corporation, Tokyo (JP)
PCT Filed Mar. 10, 2020, PCT No. PCT/JP2020/010185
§ 371(c)(1), (2) Date Sep. 8, 2021,
PCT Pub. No. WO2020/184539, PCT Pub. Date Sep. 17, 2020.
Claims priority of application No. 2019-045641 (JP), filed on Mar. 13, 2019.
Prior Publication US 2022/0051413 A1, Feb. 17, 2022
Int. Cl. G06T 7/20 (2017.01)
CPC G06T 7/20 (2013.01) [G06T 2207/10016 (2013.01); G06T 2207/30196 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An object tracking device comprising:
a memory storing instructions; and
a processor configured to execute the instructions to:
detect an object from video data using a currently selected object detection program of a plurality of object detection programs that are used to detect the object but that are of different detection accuracy;
generate a predicted position of the object from a detected position of the object and track the object using the predicted position;
control the currently selected object detection program, based on a detection result of the object and a tracking result of the object;
when the object is no longer detected at the predicted position, select a different object detection program of the plurality of object detection programs to instead use to detect the object; and
when the object has been detected at the predicted position more than a predetermined number of times, select a most accurate object detection program of those of the plurality of object detection programs that have lower accuracy than the currently selected object detection program, to instead use to detect the object.