Method and Apparatus for Object Detection in an Image

• US 20100183195A1
• Filed: 01/21/2010
• Published: 07/22/2010
• Est. Priority Date: 01/21/2009
• Status: Active Grant

• Current Assignee: Texas Instruments, Inc.
• Original Assignee: Texas Instruments, Inc.
• Inventors: Sharma, Vinay
• Granted Patent: US 8,340,354 B2
• Time in Patent Office: Days
• US Class Current: 382/103
• CPC Class Codes: G06V 10/255 Detecting or recognising potential candidate objects based on visual cues, e.g. shapes
• CPC Class Codes: G06V 20/52 Surveillance or monitoring of activities, e.g. for recognising suspicious objects recognising microscopic objects G06V20/69

Abstract

A method and apparatus for detecting at least one of a location and a scale of an object in an image. The method comprising distinguishing the trailing and leading edges of a moving object in at least one portion of the image, applying a symmetry detection filter to at least a portion of the image to produce symmetry scores relating to the at least one portion of the image, and identifying at least one location corresponding to locally maximal symmetry scores of the symmetry scores relating to the at least one portion of the image, and utilizing the at least one location of the locally maximal symmetry scores to detect at least one of a location and a scale of the object in the image, wherein the scale relates to the size of the symmetry detection filter.

Claims

1. A method of a circuit unit for detecting at least one of a location and a scale of an object in an image, comprising:

distinguishing the trailing and leading edges of a moving object in at least one portion of the image;

applying a symmetry detection filter to at least a portion of the image to produce symmetry scores relating to the at least one portion of the image;

identifying at least one location corresponding to locally maximal symmetry scores of the symmetry scores relating to the at least one portion of the image; and

utilizing the at least one location of the locally maximal symmetry scores to detect at least one of a location and a scale of the object in the image, wherein the scale relates to the size of the symmetry detection filter.

2. The method of claim 1, wherein the step of distinguishing the trailing and leading edges generates another image.

3. The method of claim 2, wherein the symmetry detection filter is applied of the other image.

4. The method of claim 1, wherein the identifying step generates more than one location of close proximity to one another.

5. The method of claim 4, wherein the more than one location are at least one of identified as one location or grouped to become a single location.

6. The method of claim 4, wherein the more than one location are at least one of identified as one scale or grouped to represent a single scale.

7. An apparatus for detecting at least one of a location and a scale of an object in an image, comprising:

means for distinguishing the trailing and leading edges of a moving object in at least one portion of the image;

means for applying a symmetry detection filter to at least a portion of the image to produce symmetry scores relating to the at least one portion of the image;

means for identifying at least one location corresponding to locally maximal symmetry scores of the symmetry scores relating to the at least one portion of the image; and

means for utilizing the at least one location of the locally maximal symmetry scores to detect at least one of a location and a scale of the object in the image, wherein the scale relates to the size of the symmetry detection filter.

8. The apparatus of claim 7, wherein the means for distinguishing the trailing and leading edges generates another image.

9. The apparatus of claim 8, wherein the symmetry detection filter is applied of the other image.

10. The apparatus of claim 7, wherein the means for identifying generates more than one location of close proximity to one another.

11. The apparatus of claim 10, wherein the more than one location are at least one of identified as one location or grouped to become a single location.

12. The apparatus of claim 10, wherein the more than one location are at least one of identified as one scale or grouped to become a single scale.

13. A computer readable medium comprising software that, when executed by a processor, causes the processor to perform a method for detecting at least one of a location and a scale of an object in an image, comprising:

distinguishing the trailing and leading edges of a moving object in at least one portion of the image;

applying a symmetry detection filter to at least a portion of the image to produce symmetry scores relating to the at least one portion of the image;

identifying at least one location corresponding to locally maximal symmetry scores of the symmetry scores relating to the at least one portion of the image; and

utilizing the at least one location of the locally maximal symmetry scores to detect at least one of a location and a scale of the object in the image, wherein the scale relates to the size of the symmetry detection filter.

14. The computer readable medium of claim 13, wherein the step of distinguishing the trailing and leading edges generates another image.

15. The computer readable medium of claim 14, wherein the symmetry detection filter is applied of the other image.

16. The computer readable medium of claim 13, wherein the identifying step generates more than one location of close proximity to one another.

17. The computer readable medium of claim 16, wherein the more than one location are at least one of identified as one location or grouped to become a single location.

18. The computer readable medium of claim 16, wherein the more than one location are at least one of identified as one scale or grouped to become a single scale.