Motion Detection Device

• US 20080205710A1
• Filed: 09/26/2006
• Published: 08/28/2008
• Est. Priority Date: 09/27/2005
• Status: Active Grant

• Current Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Benten, Harold Gerardus Pieter Hendrikus
• Granted Patent: US 8,135,177 B2
• Time in Patent Office: Days
• US Class Current: 382/107
• CPC Class Codes: G06T 7/238 using non-full search, e.g. three-step search
• CPC Class Codes: G08G 1/017 identifying vehicles G08G1/015, G08G1/054 take precedence
• CPC Class Codes: G08G 1/052 with provision for determining speed or overspeed speed measuring in general G01P

Abstract

The invention refers to a device, a method and a computer program product for extracting motion information from a sequence of video frames. Existing solutions for extracting motion information from sequence of video frames need a massive computing power which make it difficult and expensive to implement a real-time system. It is therefore an object of the invention to simplify such a device and to provide a real-time embedded system. It is suggested to provide a device comprising a digital video camera 1. The video camera 1 includes a processing unit 3 for processing video frames grabbed by the video camera 1. The processing uses a 3D recursive search block matching algorithm to extract the motion information from the video frames. The device can be used for traffic surveillance applications, e.g. for determining the speed of vehicles on the streets and roads.

Claims

1. A device for extracting motion information from a sequence of video frames, comprising:

a digital video camera for grabbing a sequence of video frames,

a processing unit for processing the video frames provided by the video camera,

the processing unit being adapted to use a recursive search block algorithm to determine whether the video frames show an object or person which is moving.

2. Device according to claim 1, characterized in that the processing unit is adapted to determine the velocity of the object or the person.

3. Device according to claim 2, characterized in that the processing unit is adapted to determine simultaneously the velocity of a multitude of objects or persons.

4. Device according to claim 1, characterized in that the processing system is located in the housing of the video camera.

5. Device according to claim 1, characterized in that the processing system is implemented as a real-time system.

6. Device according to claim 1, characterized in that the processing system is adapted to indicate the position of the moving object or the moving person.

7. Device according to claim 1, characterized in that the processing system is adapted to carry out an object recognition.

8. Device according to claim 1, characterized in that the processing system is adapted to carry out a number plate recognition.

9. A method for extracting motion information from a sequence of video frames, comprising:

grabbing a sequence of video frames,

processing the digital video frames, the processing being carried out by using a recursive search block algorithm to determine whether the video frames show an object or person which is moving.

10. Method according to claim 9, characterized in that the velocity of the object or the person is determined.

11. Method according to claim 9, characterized in that the velocity of a multitude of objects or persons are determined simultaneously.

12. Method according to claim 9, wherein surveillance applications are used for detecting an intrusion into a building or into premises.

13. Method according to claim 9, wherein a road-rule enforcement camera is used.

14. A computer readable medium, having thereon a computer program, when executed, for carrying out acts comprising:

grabbing a sequence of video frames; and

processing the digital video frames, the processing being carried out by using a recursive search block algorithm to determine whether the video frames show an object or person which is moving.