Method of tracking a moving object by an emissivity of the moving object

• US 7,991,192 B2
• Filed: 11/27/2002
• Issued: 08/02/2011
• Est. Priority Date: 11/27/2002
• Status: Expired due to Fees

• Current Assignee: Lockheed Martin Corporation (Martin Marietta Corporation)
• Original Assignee: Lockheed Martin Corporation (Martin Marietta Corporation)
• Inventors: Nguyen, Dat, Lee, Harry C.
• Primary Examiner(s): ANDREA, BRIAN K
• Application Number:
  US10/304,913
• Publication Number:
  US 20070092109A1
• Time in Patent Office: 3,170 Days
• Field of Search: 382/103, 250/203.1, 250/203.6, 250/202, 356/28, 244 311- 316
• US Class Current: 382/103
• CPC Class Codes: G06T 7/73 using feature-based methods

Abstract

A method of tracking a moving object by an emissivity of the moving object including receiving first frame data containing emissivity image data of an emissivity from the moving object within a scene, extracting characterization image data from the first frame data that represents edges and gradients of the emissivity, and analyzing the characterization image data for tracking information.

Claims

1. A method of tracking a moving object by an emissivity of the moving object comprising:

receiving first frame data containing emissivity image data of an emissivity from the moving object within a scene;

extracting characterization image data from the first frame data that represents edges and gradients of the emissivity, and

analyzing the characterization image data for tracking information, wherein extracting characterization image data from the first frame data that represents edges and gradients of the emissivity includes an erosion process and a gradient operation.

2. The method according to claim 1 wherein the emissivity is a combustion plume of the moving object.

3. The method according to claim 1 wherein the first frame data is from a first capture window within scene image data for a scene containing the emissivity.

4. The method according to claim 3, wherein the position of the first capture window is determined using flight information from the moving object.

5. The method according to claim 1 wherein the first frame data contains thresholded image data of the emissivity.

6. The method according to claim 1 wherein analyzing the characterization image data for tracking information includes determining a dimension of the emissivity.

7. The method according to claim 6 wherein the dimension is a chord of the emissivity.

8. The method according to claim 1 wherein analyzing the characterized image data for tracking information includes determining a position of the moving object within the scene.

9. A method of tracking a moving object by an emissivity of the moving object comprising:

receiving first frame data containing emissivity image data of an emissivity from the moving object within a scene;

extracting characterization image data from the first frame data that represents edges and gradients of the emissivity, and

analyzing the characterization image data for tracking information by determining a position of the moving object within the scene, wherein the determining includes;

computing a maximum gradient of the emissivity;

computing a maximum chord dimension of the emissivity; and

assigning an intersection of the maximum gradient and an end of the maximum chord dimension as a position of the moving object within the scene.

10. The method according to claim 9 wherein extracting characterization image data from the first frame data that represents edges and gradients of the emissivity includes a tracing process and a gradient operation.

11. A method of tracking a moving object by an emissivity of the moving object comprising:

receiving first frame data containing emissivity image data of an emissivity from the moving object within a scene, wherein the first frame data is from a first capture window within scene image data for a scene containing the emissivity;

extracting characterization image data from the first frame data that represents edges and gradients of the emissivity, and

analyzing the characterization image data for tracking information, wherein the tracking information is used to calculate a position of a second capture window within the scene image data for a second frame data containing emissivity image data.

12. The method according to claim 11 wherein the second capture window is different size than the first capture window.

13. A method of tracking a moving object by an emissivity of the moving object comprising:

receiving first frame data containing emissivity image data of an emissivity from the moving object within a scene;

extracting characterization image data from the first frame data that represents characteristics of the emissivity; and

analyzing the characterization image data for tracking information by determining a dimension of the emissivity within the characterization image data, wherein extracting characterization image data from the first frame data that represents characteristics of the emissivity includes;

a gradient operation; and

one of an erosion process and a tracing process.

14. The method according to claim 13 wherein the emissivity is a combustion plume of the moving object.

15. The method according to claim 13, wherein the first frame data is from a first capture window within scene image data for a scene containing the emissivity.

16. The method according to claim 13 wherein analyzing the characterization image data for tracking information by determining a dimension of the emissivity within the characterization image data includes determining a position of the moving object within the scene.

17. A method of tracking a moving object by an emissivity of the moving object comprising:

receiving first frame data containing emissivity image data of an emissivity from the moving object within a scene;

extracting characterization image data from the first frame data that represents characteristics of the emissivity; and

analyzing the characterization image data for tracking information by determining a dimension of the emissivity within the characterization image data and by determining a position of the moving object within the scene, wherein determining a position of the moving object within the scene includes;

computing a maximum gradient of the emissivity;

computing a maximum chord dimension of the emissivity; and

assigning an intersection of the maximum gradient and an end of the maximum chord dimension as a position of the moving object within the scene.

18. A method of tracking a moving object by an emissivity of the moving object comprising:

receiving first frame data containing emissivity image data of an emissivity from the moving object within a scene, wherein the first frame data is from a first capture window within scene image data for a scene containing the emissivity;

extracting characterization image data from the first frame data that represents characteristics of the emissivity; and

analyzing the characterization image data for tracking information by determining a dimension of the emissivity within the characterization image data, wherein the tracking information is used to calculate a position of a second capture window within the scene image data for a second frame data containing emissivity image data.