公开(公告)号：US10565733B1

公开(公告)日：2020-02-18

申请号：US15445171

申请日：2017-02-28

Applicant: Alarm.com Incorporated

Inventor： Zhong Zhang ,  Allison Beach ,  Narayanan Ramanathan ,  Don Madden

IPC: G06T7/80 ,  H04N17/00

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for virtual inductance loop technology. In one aspect, a method includes calibrating, using calibration parameters, cameras directed towards a scene, obtaining, by the cameras, images corresponding to the scene, identifying reference structures in the scene, and determining, based on the reference structures and the images, locations in the scene for generating virtual inductance loop lines in the scene. The method also includes generating the virtual inductance loop lines to be imposed on the images, comparing the virtual inductance loop lines to determine one or more offsets, and determining, based on the offsets, characteristics of the scene.

公开(公告)号：US10169665B1

公开(公告)日：2019-01-01

申请号：US15445071

申请日：2017-02-28

Applicant: Alarm.com Incorporated

Inventor： Zhong Zhang ,  Allison Beach ,  Narayanan Ramanathan ,  Don Madden

IPC: G06K9/00 ,  G06K9/62 ,  G06T7/80 ,  G06T7/70 ,  G06T7/292 ,  G06T7/11

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for virtual inductance loop technology. In one aspect, a method includes calibrating, using calibration parameters, cameras directed towards a scene, obtaining, by the cameras, images corresponding to the scene, identifying reference structures in the scene, and determining, based on the reference structures and the images, locations in the scene for generating virtual inductance loop lines in the scene. The method also includes generating the virtual inductance loop lines to be imposed on the images, comparing the virtual inductance loop lines to determine one or more offsets, and determining, based on the offsets, characteristics of the scene.