公开(公告)号：US20240386579A1

公开(公告)日：2024-11-21

申请号：US18616830

申请日：2024-03-26

Applicant: Axis AB

Inventor： Niclas DANIELSSON ,  Christian Colliander ,  Amanda Nilsson ,  Sarah Laross

IPC: G06T7/215 ,  G06T7/246 ,  G06V10/25 ,  G06V10/40

Abstract: A method for prioritizing feature extraction for object re-identification in an object tracking application. Region of interests (ROI) for object feature extraction is determined based on motion areas in the image frame. Each object detected in an image frame and which is at least partly overlapping with a ROI is associated with the ROI. A list of candidate objects for feature extraction is determined by, for each ROI associated with two or more objects: adding each object of the two or more objects that is not overlapping with any of the other objects among the two or more objects with more than a threshold amount. From the list of candidate objects, at least one object is selected, and image data of the image frame depicting the selected object is used for determining a feature vector for the selected object.

公开(公告)号：US20240005516A1

公开(公告)日：2024-01-04

申请号：US18341004

申请日：2023-06-26

Applicant: Axis AB

Inventor： ANTON ÖHRN ,  Johan Sternby ,  Amanda Nilsson

IPC: G06T7/20 ,  G06V10/764

CPC classification number: G06T7/20 ,  G06V10/764 ,  G06T2207/10016

Abstract: A method for tracking an object in a scene is provided, including receiving a first image frame of a first image stream capturing a scene; detecting or tracking a first object in the first image frame, and determining that the first object is in a first part of the first image frame; determining, using object detection, that the first object belongs to a first object class; determining, based on multiple values of a tracking parameter each specific for different parts of the first image frame and for different object classes, a first value of the tracking parameter for the first part of the first image and for the first object class, and tracking the first object in a second image frame of the first image stream subsequent to the first image frame, based on the first value of the tracking parameter.

公开(公告)号：US12293529B2

公开(公告)日：2025-05-06

申请号：US18616830

申请日：2024-03-26

Applicant: Axis AB

Inventor： Niclas Danielsson ,  Christian Colliander ,  Amanda Nilsson ,  Sarah Laross

IPC: G06V10/40 ,  G06T7/215 ,  G06T7/246 ,  G06V10/25

Abstract: A method for prioritizing feature extraction for object re-identification in an object tracking application. Region of interests (ROI) for object feature extraction is determined based on motion areas in the image frame. Each object detected in an image frame and which is at least partly overlapping with a ROI is associated with the ROI. A list of candidate objects for feature extraction is determined by, for each ROI associated with two or more objects: adding each object of the two or more objects that is not overlapping with any of the other objects among the two or more objects with more than a threshold amount. From the list of candidate objects, at least one object is selected, and image data of the image frame depicting the selected object is used for determining a feature vector for the selected object.

公开(公告)号：US20240212196A1

公开(公告)日：2024-06-27

申请号：US18533904

申请日：2023-12-08

Applicant: Axis AB

Inventor： Anton ÖHRN ,  Johan Sternby ,  Amanda Nilsson

IPC: G06T7/70 ,  G06V10/25 ,  G06V10/764

CPC classification number: G06T7/70 ,  G06V10/25 ,  G06V10/764 ,  G06V2201/07

Abstract: A method, a device and a non-transitory computer-readable storage medium for setting a confidence threshold for objects detected in a region of a captured scene based on historical confidence scores for objects detected in that region.