Method and system for movement detection and service server

• US 9,905,095 B2
• Filed: 08/13/2013
• Issued: 02/27/2018
• Est. Priority Date: 08/13/2012
• Status: Active Grant

• Current Assignee: ZTE Corporation
• Original Assignee: ZTE Corporation
• Inventors: Yue, Zhipeng
• Primary Examiner(s): AN, SHAWN S
• Application Number:
  US14/421,193
• Publication Number:
  US 20150243142A1
• Time in Patent Office: 1,659 Days
• CPC Class Codes: G06T 2207/30232 Surveillance
• CPC Class Codes: G06T 7/20 Analysis of motion motion estimation for coding, decoding, compressing or decompressing digital video signals H04N19/43, H04N19/51
• CPC Class Codes: G08B 13/19604 involving reference image or background adaptation with time to compensate for changing conditions, e.g. reference image update on detection of light level change
• CPC Class Codes: G08B 13/19606 Discriminating between target movement or movement in an area of interest and other non-signicative movements, e.g. target movements induced by camera shake or movements of pets, falling leaves, rotating fan
• CPC Class Codes: G08B 13/1963 Arrangements allowing camera rotation to change view, e.g. pivoting camera, pan-tilt and zoom [PTZ]
• CPC Class Codes: G08B 21/22 responsive to presence or absence of persons
• CPC Class Codes: H04L 67/10 in which an application is distributed across nodes in the network software deployment G06F8/60; multiprogramming arrangements G06F9/46
• CPC Class Codes: H04N 7/183 for receiving images from a single remote source
• CPC Class Codes: H04N 7/188 Capturing isolated or intermittent images triggered by the occurrence of a predetermined event, e.g. an object reaching a predetermined position signal generation from motion picture films H04N5/253

Abstract

A method for moving detection includes: a service server acquiring a first surveillance image captured by a camera at a preset first moment, and calculating a first moving angle of a pan-tilt; acquiring a second surveillance image captured by the camera at a preset second moment, and calculating a second moving angle of the pan-tilt; and determining by comparison whether common images in the first surveillance image and the second surveillance image are consistent according to the first moving angle and the second moving angle; if inconsistent, triggering a moving detection alarm. The embodiments of the present document also disclose a corresponding system and a service server. The disclosed solution of the embodiments of the present document is applied to implement moving detection when a camera is in moving state, ensures the accuracy of moving detection alarm in a great extent.

Claims

1. A method for moving detection, comprising:

a service server acquiring a first surveillance image captured by a camera at a preset first moment, and calculating a first moving angle of a pan-tilt;

acquiring a second surveillance image captured by the camera at a preset second moment, and calculating a second moving angle of the pan-tilt; and

determining by comparison whether common images in the first surveillance image and the second surveillance image are consistent according to the first moving angle and the second moving angle;

if inconsistent, triggering a moving detection alarm;

wherein a time interval between the preset second moment and the preset first moment is less than (a viewing angle of the camera)/(a moving speed of the pan-tilt*2).

2. The method according to claim 1, before executing the step of acquiring a first surveillance image captured by a camera at a preset first moment, further comprising:

sending a control request to the pan-tilt to control movement of the pan-tilt;

receiving a control response message returned by the pan-tilt, and recording a current moving speed reported by the pan-tilt.

3. The method according to claim 2, wherein, the step of acquiring a first surveillance image captured by a camera at a preset first moment, and calculating a first moving angle of a pan-tilt comprises:

acquiring the first surveillance image captured by the camera at the preset first moment when the pan-tilt moves to the first moving angle;

calculating an angle value of the first moving angle according to the current moving speed.

4. The method according to claim 3, wherein, the step of acquiring a second surveillance image captured by the camera at a preset second moment, and calculating a second moving angle of the pan-tilt comprises:

acquiring the second surveillance image captured by the camera at the preset second moment when the pan-tilt moves to the second moving angle;

calculating an angle value of the second moving angle according to the current moving speed.

5. The method according to claim 2, before executing the step of determining by comparison whether common images in the first surveillance image and the second surveillance image are consistent according to the first moving angle and the second moving angle, further comprising:

determining a viewing angle range of the common image of the first surveillance image and the second surveillance image according to the viewing angle of the camera and the current moving speed.

6. The method according to claim 3, before executing the step of determining by comparison whether common images in the first surveillance image and the second surveillance image are consistent according to the first moving angle and the second moving angle, further comprising:

determining a viewing angle range of the common image of the first surveillance image and the second surveillance image according to the viewing angle of the camera and the current moving speed.

7. The method according to claim 4, before executing the step of determining by comparison whether common images in the first surveillance image and the second surveillance image are consistent according to the first moving angle and the second moving angle, further comprising:

determining a viewing angle range of the common image of the first surveillance image and the second surveillance image according to the viewing angle of the camera and the current moving speed.

8. The method according to claim 1, before executing the step of determining by comparison whether common images in the first surveillance image and the second surveillance image are consistent according to the first moving angle and the second moving angle, further comprising:

determining a viewing angle range of the common image of the first surveillance image and the second surveillance image according to the viewing angle of the camera and the current moving speed.

9. A service server, comprising:

a first acquisition and calculation module, configured to acquire a first surveillance image captured by a camera at a preset first moment, and calculate a first moving angle of a pan-tilt;

a second acquisition and calculation module, configured to acquire a second surveillance image captured by a camera at a preset second moment, and calculate a second moving angle of a pan-tilt;

a comparison module, configured to determine by comparison whether common images in the first surveillance image and the second surveillance image are consistent according to the first moving angle and the second moving angle, if inconsistent, trigger a moving detection alarm;

wherein a time interval between the preset second moment and the preset first moment is less than (a viewing angle of the camera)/(a moving speed of the pan-tilt*2).

10. The service server according to claim 9, further comprises:

a determination module, configured to determine a viewing angle range of the common image of the first surveillance image and the second surveillance image according to a viewing angle of the camera and the current moving speed.

11. The service server according to claim 9, further comprising:

a request sending module, configured to send a control request to the pan-tilt to control movement of the pan-tilt; and

a recording module, configured to receive a control response message returned by the pan-tilt, and record a current moving speed reported by the pan-tilt.

12. The service server according to claim 11, wherein, the first acquisition and calculation module comprises:

a first acquisition unit, configured to acquire the first surveillance image captured by the camera at the preset first moment when the pan-tilt moves to the first moving angle; and

a first calculation unit, configured to calculate an angle value of the first moving angle according to the current moving speed.

13. The service server according to claim 12, wherein, the second acquisition and calculation module comprises:

a second acquisition unit, configured to acquire the second surveillance image captured by the camera at the preset second moment when the pan-tilt moves to the second moving angle; and

a second calculation unit, configured to calculate an angle value of the second moving angle according to the current moving speed.

14. The service server according to claim 11, further comprises:

a determination module, configured to determine a viewing angle range of the common image of the first surveillance image and the second surveillance image according to a viewing angle of the camera and the current moving speed.

15. The service server according to claim 12, further comprises:

a determination module, configured to determine a viewing angle range of the common image of the first surveillance image and the second surveillance image according to a viewing angle of the camera and the current moving speed.

16. The service server according to claim 13, further comprises:

a determination module, configured to determine a viewing angle range of the common image of the first surveillance image and the second surveillance image according to a viewing angle of the camera and the current moving speed.

17. A system for moving detection, comprising a pan-tilt extending a surveillance scope through a rotation of the pan-tilt, a camera capturing a surveillance image, and a service server, wherein, the service server is configured to:

acquire a first surveillance image captured by the camera at a preset first moment, and calculate a first moving angle of the pan-tilt;

acquire a second surveillance image captured by the camera at a preset second moment, and calculate a second moving angle of the pan-tilt;

determine by comparison whether common images in the first surveillance image and the second surveillance image are consistent according to the first moving angle and the second moving angle, if inconsistent, trigger a moving detection alarm;

wherein a time interval between the preset second moment and the preset first moment is less than (a viewing angle of the camera)/(a moving speed of the pan-tilt*2).