公开(公告)号：US20240394919A1

公开(公告)日：2024-11-28

申请号：US18322217

申请日：2023-05-23

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： Aleksey Lipchin ,  Chia Ying Lee ,  Keshav T. Seshadri ,  Sergey Veselkov

IPC: G06T7/80 ,  G06T7/70

Abstract: Systems and method for camera calibration. In one example, the camera includes an electronic processor configured to obtain a bounding box in a captured image, the bounding box bounding a person in the image and having a lowermost vertical coordinate and an uppermost vertical coordinate. The electronic processor determines an initial estimation of values of a set of camera parameters Θ and a current estimation of values of the set of camera parameters Θ based on the initial estimation. The electronic processor iteratively updates the current estimation of values of the set of camera parameters Θ by determining feet coordinates within the bounding box, determining a vertical head coordinate, and updating the current estimation of values of the set of camera parameters Θ by reducing a difference between the vertical head coordinate and the uppermost vertical coordinate of the bounding box.

公开(公告)号：US20250046175A1

公开(公告)日：2025-02-06

申请号：US18363579

申请日：2023-08-01

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： Aleksey Lipchin ,  Maksim Bolonkin ,  Keshav T. Seshadri ,  Sergey Veselkov

IPC: G08B21/22 ,  G06T7/20 ,  G06V10/25 ,  G06V20/52

Abstract: Examples provide an imaging system including an electronic processor configured to obtain video data of a scene including a region of interest including a plurality of frames, determine a total number of detected humans in the region of interest of a current frame of the plurality of frames, determine a number of running humans in the region of interest of the current frame, and determine a probability associated with the number of running humans in the region of interest of the current frame and the total number of detected humans in the region of interest of the current frame based on accumulated statistics for the region of interest. In response to determining that the probability is less than a threshold probability, the electronic processor generates an alert indicating a stampede is detected in the region of interest.