DIGITAL VIDEO RECORDER AND METHOD OF TRACKING OBJECT USING THE SAME

• US 20130129314A1
• Filed: 11/23/2012
• Published: 05/23/2013
• Est. Priority Date: 11/23/2011
• Status: Abandoned Application

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: LIM, Hyoseung
• Application Number:
  US13/684,391
• Publication Number:
  US 20130129314A1
• Time in Patent Office: Days
• US Class Current: 386/239
• CPC Class Codes: H04N 5/772 the recording apparatus and the television camera being placed in the same enclosure
• CPC Class Codes: H04N 9/7904 using intermediate digital signal processing

Abstract

Provided are a digital video recorder and a method of tracking an object using the same. The method includes: receiving a video; encoding the video to generate an encoded video; extracting a motion vector from the encoded video; generating object movement information on an object on the basis of the motion vector; and tracking a temporal movement pattern of the object on the basis of the object movement information.

Claims

1. A method of tracking an object, the method comprising:

receiving a video;

encoding the video to generate an encoded video;

extracting a motion vector from the encoded video;

generating object movement information on an object on the basis of the motion vector; and

tracking a temporal movement pattern of the object on the basis of the object movement information.

2. The method of claim 1, wherein the object movement information comprises information on a representative movement vector on the object.

3. The method of claim 2, further comprising:

receiving a temporal movement pattern as a search condition; and

when the search condition matches the temporal movement pattern of the object, outputting a portion where a movement of the object occurs in the video.

4. The method of claim 2, wherein the object movement information comprises information on the shape of the object, information on the position of the object, and information on the color of the object.

5. The method of claim 1, wherein the generating of the object movement information comprises:

removing noise from the extracted motion vector; and

generating the object movement information on the basis of the noise-removed motion vector having.

6. The method of claim 1, further comprising storing a temporal movement pattern of the tracked object in a database.

7. The method of claim 1, wherein the video comprises a video captured by a camera.

8. The method of claim 1, wherein

the extracting of the motion vector comprises extracting a plurality of motion vectors from each of a plurality of frames in the encoded video;

and

the generating of the object movement information comprises generating the object movement information on the basis of the plurality of extracted motion vectors.

9. The method of claim 8, wherein

the generating of the object movement information on the basis of the plurality of extracted motion vectors comprises generating one or more pieces of object movement information for each of a plurality of frames on the basis of the plurality of extracted motion vectors;

and

the tracking of the temporal movement pattern comprises tracking a plurality of temporal movement patterns respectively corresponding to a plurality of objects on the basis of a plurality of pieces of object movement information for the plurality of frames.

10. The method of claim 8, wherein the tracking of the temporal movement pattern comprises:

filtering the plurality of extracted motion vectors according to a filtering condition to extract a plurality of filtered motion vectors matching the filtering condition; and

generating the object movement information on the basis of the plurality of filtered motion vectors.

11. The method of claim 10, wherein extracting the plurality of filtered motion vectors matching the filtering condition comprises:

extracting a group of motion vectors having a component within a predetermined range.

12. An object tracking device comprising:

a video receiving unit for receiving a video;

an encoder for encoding the video to generate an encoded video;

a motion filtering unit for extracting a motion vector from the encoded video and generating object movement information on an object on the basis of the extracted motion vector; and

an object tracking unit for tracking a temporal movement pattern of the object on the basis of the movement information.

13. The device of claim 12, wherein the object movement information comprises information on a representative movement vector on the object.

14. The device of claim 13, further comprising:

a search condition receiving unit for receiving a temporal movement pattern as a search condition; and

a search result outputting unit for outputting a portion that a movement of the object occurs in the video when the search condition matches the temporal movement pattern of the object.

15. The device of claim 13, wherein the object movement information further comprises at least one of information on the shape of the object, information on the position of the object, and information on the color of the object.

16. The device of claim 12, wherein the motion filtering unit removes noise from the extracted motion vector and generates the object movement information on the basis of the noise-removed motion vector.

17. The device of claim 12, wherein the motion filtering unit extracts a plurality of motion vectors from each of a plurality of frames in the encoded video and generates the object movement information on the basis of the plurality of extracted motion vectors.

18. The device of claim 17, wherein

the motion filtering unit generates at least one object movement information for each of a plurality of frames on the basis of the plurality of extracted motion vectors;

and

the object tracking unit tracks a plurality of temporal movement patterns respectively corresponding to a plurality of objects on the basis of a plurality of pieces of object movement information for the plurality of frames.

19. The device of claim 17, wherein the motion filtering unit filters the plurality of extracted motion vectors according to a filtering condition to extract a plurality of filtered motion vectors matching the filtering condition, and generates the object movement information on the basis of the plurality of filtered motion vectors.

20. The device of claim 19, wherein the motion filtering unit extracts a group of motion vectors having a component within a predetermined range.