公开(公告)号：US20210133491A1

公开(公告)日：2021-05-06

申请号：US17259063

申请日：2018-08-08

Applicant: ShopperTrak RCT Corporation

Inventor： Zhiqian WANG

IPC: G06K9/62 ,  G06K9/00

Abstract: Techniques for evaluating height data are disclosed herein. Height values for a tracked object are obtained over a specified period of time. Clusters including at least one of the height values are generated. The cluster having the largest amount of height values is identified. A height of the tracked object is estimated from the identified cluster.

公开(公告)号：US20220148321A1

公开(公告)日：2022-05-12

申请号：US17582760

申请日：2022-01-24

Applicant: SHOPPERTRAK RCT CORPORATION

Inventor： Zhiqian WANG ,  William C. KASTILAHN

IPC: G06V20/64 ,  G06T7/80 ,  G06T7/285 ,  G06T7/292 ,  G06V20/54

Abstract: A method of identifying, tracking, and counting human objects of interest based upon at least one pair of stereo image frames taken by at least one image capturing device, comprising the steps of: obtaining said stereo image frames and converting each said stereo image frame to a rectified image frame using calibration data obtained for said at least one image capturing device; generating a disparity map based upon a pair of said rectified image frames; generating a depth map based upon said disparity map and said calibration data; identifying the presence or absence of said objects of interest from said depth map and comparing each of said objects of interest to existing tracks comprising previously identified objects of interest; for each said presence of an object of interest, adding said object of interest to one of said existing tracks if said object of interest matches said one existing track, or creating a new track comprising said object of interest if said object of interest does not match any of said existing tracks; updating each said existing track; and maintaining a count of said objects of interest in a given time period based upon said existing tracks created or modified during said given time period.

公开(公告)号：US20220129662A1

公开(公告)日：2022-04-28

申请号：US17508717

申请日：2021-10-22

Applicant: ShopperTrak RCT Corporation

Inventor： Zhiqian WANG

IPC: G06K9/00 ,  G06K9/20 ,  G06N20/00

Abstract: Apparatus and methods for determining information about one or more objects in a 3-dimensional (3D) space are disclosed. One aspect of the method includes defining a virtual ground plane within a monitored 3D space. The virtual ground plane is divided into a plurality of bins. Each bin has corresponding counter value. An object is detected in a respective image captured by each of a plurality of sensors. A respective line segment is selected corresponding to a respective light between each of the plurality of image sensors and the detected object. One or more bins of the virtual ground plane are selected onto which a respective projected line segment of each respective line segment overlap. Each counter value for each of the one or more selected bins is increased. A location of the object is determined based on a bin of the one or more bins having a highest counter value.

公开(公告)号：US20190019017A1

公开(公告)日：2019-01-17

申请号：US16123769

申请日：2018-09-06

Applicant: SHOPPERTRAK RCT CORPORATION

Inventor： Zhiqian WANG ,  Edward A. Marcheselli ,  Gary Dispensa ,  Thomas D. Stemen ,  William C. Kastilahn

IPC: G06K9/00 ,  G06T7/20 ,  G07C9/00 ,  G06T7/73 ,  G06F17/30

CPC classification number: G06K9/00335 ,  G06F16/55 ,  G06F16/5866 ,  G06K9/00342 ,  G06K9/00778 ,  G06T7/20 ,  G06T7/73 ,  G07C9/00 ,  G07C9/00111 ,  G07C9/00896 ,  G07C9/00904 ,  G07C2209/08 ,  G07C2209/64

Abstract: Techniques for distinguishing objects (e.g., an individual or an individual pushing a shopping cart) are disclosed. An object is detected in images of a scene. A height map is generated from the images, and the object is represented as height values in the height map. Based on height properties associated with another object, it is determined whether the other object is associated with the object. If so determined, the objects are classified separately.