System and method using thermal image analysis for polygraph testing

• US 6,854,879 B2
• Filed: 11/13/2001
• Issued: 02/15/2005
• Est. Priority Date: 04/19/2001
• Status: Active Grant

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: Pavlidis, Ioannis
• Primary Examiner(s): Gutierrez, Diego
• Assistant Examiner(s): Jagan, Mirellys
• Application Number:
  US10/008,392
• Publication Number:
  US 20030012253A1
• Time in Patent Office: 1,190 Days
• Field of Search: 374/45, 600/504, 600/474, 600/479, 600/500, 600/505
• US Class Current: 374/45
• CPC Class Codes: A61B 5/015 By temperature mapping of body part
• CPC Class Codes: A61B 5/164 Lie detection

Abstract

Thermal image data of at least a region of a face of a person is provided. The thermal image data is transformed to blood flow rate data and may be used to determine whether the person is deceptive or non-deceptive based on the blood flow rate data, e.g., deceptive with respect to an elicited response from the person.

Claims

1. A method for use in detecting deception of a person, the method comprising:

providing a plurality of frames of thermal image data of at least a region of a face of a person; and

transforming the thermal image data to blood flow rate data for use in determining whether the person is deceptive or non-deceptive, wherein transforming the thermal image data comprises calculating change of blood flow rate over the plurality of frames of the thermal image data.

2. The method of claim 1, wherein determining whether the person is deceptive or non-deceptive comprises classifying the person as deceptive or non-deceptive based on a change of blood flow rate in the at least one region of the face.

3. The method of claim 1, wherein transforming the thermal image data comprises transforming the thermal image data using a thermodynamic model where change of blood flow rate is inversely proportional to the square of skin temperature deviation from a core temperature of a human body.

4. The method of claim 1, wherein providing the thermal image data comprises providing thermal image data of at least a region proximate an eye of the person.

5. The method of claim 1, wherein providing the thermal image data comprises providing thermal image data of more than one region of the face of the person.

6. The method of claim 1, wherein providing thermal image data comprises:

focusing a thermal infrared image device operable to provide thermal image data on at least the region of the face of the person;

capturing the plurality of frames of thermal image data during at least a period of time; and

tracking movement of at least the region of the face of the person.

7. The method of claim 1, wherein providing thermal image data comprises:

asking the person a question to elicit a response therefrom;

focusing a thermal infrared image device operable to provide thermal image data on at least the region of the face of the person; and

capturing thermal image data during at least a period of time during at least the response from the person.

8. The method of claim 7, wherein determining whether the person is deceptive or non-deceptive based on the blood flow rate data comprises determining whether the person is being deceptive or non-deceptive with respect to the response to the question.

9. The method of claim 1, wherein the method further comprises providing measurement of at least one physiological parameter different than change of blood flow rate obtained using thermal image data, and further wherein determining whether the person is deceptive or non-deceptive comprises determining whether the person is deceptive or non-deceptive based on change of blood flow rate obtained using thermal image data and the at least one physiological parameter.

10. The method of claim 9, wherein determining whether the person is deceptive or non-deceptive comprises:

making a preliminary determination of whether the person is deceptive or non-deceptive based on the at least one physiological parameters and making preliminary determination based on change of blood flow rate obtained using thermal image data; and

confirming one preliminary determination by comparing it to the other.

11. The method of claim 9, wherein providing measurement of at least one physiological parameters comprises providing measurement of the at least one physiological parameters using at least one invasive technique.

12. A system for use in detecting deception of a person, the system comprising:

a thermal infrared image device operable to provide a plurality of frames of thermal image data of at least a region of a face of a person; and

a computing apparatus operable upon the thermal image data to transform the thermal image data to blood flow rate data for use in determining whether the person is deceptive non-deceptive, wherein the transformation of the thermal image data to blood flow rate data comprises calculating change of blood flow rate over the plurality of frames of the thermal image data.

13. The system of claim 12, wherein the computing apparatus is further operable to classify the person as deceptive or non-deceptive based on a change of blood flow rate in the at least one region of the face.

14. The system of claim 12, wherein the computing apparatus is further operable to transform the thermal image data using a thermodynamic model where change of blood flow rate is inversely proportional to the square of skin temperature deviation from a core temperature of a human body.

15. The system of claim 12, wherein the thermal infrared image device is operable to provide thermal image data of at least a region proximate an eye of the person.

16. The system of claim 12, wherein the thermal infrared image device is operable to provide thermal image data of more than one region of the face of the person.

17. The system of claim 12, wherein the thermal infrared image device is operable to capture the plurality of frames of thermal image data during at least a period of time, and further wherein the computing apparatus is further operable to track movement of at least the region of the face of the person during the period of time.

18. The system of claim 12, wherein the thermal infrared image device is operable to capture thermal image data during at least a period of time during at least an elicited response from the person.

19. The system of claim 18, wherein the computing apparatus is operable to determine whether the person is deceptive or non-deceptive based on the blood flow rate data corresponding to the thermal image data captured during at least the elicited response.

20. The system of claim 12, wherein the system further comprises means for providing measurement of at least one physiological parameters different than change of blood flow rate obtained using thermal image data, and further wherein the computing apparatus is operable to determine whether the person as deceptive or non-deceptive based on the blood flow rare data obtained using thermal image data and the at least one physiological parameter.

21. The system of claim 20, wherein the computing apparatus is further operable to make a preliminary determination of whether the person is deceptive or non-deceptive based on the at least one physiological parameters and to make a preliminary determination of whether the person is deceptive or non-deceptive based on the blood flow rate data obtained using thermal image data, and thereafter, the computing apparatus is operable to confirm one preliminary determination by comparison to the other.

22. The system of claim 20, wherein the means for providing measurement of at least one physiological parameters different than change of blood flow rate obtained using thermal image data comprises invasive means for providing invasive measurement of at least one physiological parameter different than change of blood flow rate.

23. A method for use in detecting deception of a person, the method comprising:

providing thermal image data of at least a region of a face of a person; and

transforming the thermal image data to blood flow rate data for use in determining whether the person is deceptive or non-deceptive, wherein transforming the thermal image data comprises transforming the thermal image data using a thermodynamic model where change of blood flow rate is inversely proportional to the square of skin temperature deviation from a core temperature of a human body.

24. The method of claim 23, wherein determining whether the person is deceptive or non-deceptive comprises classifying the person as deceptive or non-deceptive based on a change of blood flow rate in the at least one region of the face.

25. The method of claim 23, wherein providing the thermal image date comprises providing thermal image data of at least a region proximate an eye of the person.

26. The method of claim 23, wherein providing thermal image data comprises:

asking the person a question to elicit a response therefrom;

focusing a thermal infrared image device operable to provide thermal image data on at least the region of the face of the person; and

capturing thermal image data during at least a period of time during at least the response from the person.

27. A system for use in detecting deception of a person, the system comprising:

a thermal infrared image device operable to provide thermal image date of at least a region of a face of a person; and

a computing apparatus operable upon the thermal image data to transform the thermal image data to blood flow rate data for use in determining whether the person is deceptive or non-deceptive, wherein transforming the thermal image data comprises using a thermodynamic model where change of blood flow rate is inversely proportional to the square of skin temperature deviation from a core temperature of a human body.

28. The system of claim 27, wherein the computing apparatus is further operable to classify the person as deceptive or non-deceptive based on a change of blood flow rate in the at least one region of the face.

29. The system of claim 27, wherein the thermal infrared image device is operable to provide thermal image data of at least a region proximate an eye of the person.

30. The system of claim 27, wherein the thermal infrared image device is operable to capture thermal image data during at least a period of time during at least an elicited response from the person, and further wherein the computing apparatus is operable to determine whether the person is deceptive or non-deceptive based on the blood flow rate data corresponding to the thermal image data captured during at least the elicited response.

31. A polygraph method for use in determining whether a person is being deceptive or non-deceptive with respect to a response elicited from the person, the method comprising:

capturing a plurality of frames of thermal image data from at least one region of the face of the person during at least the elicited response;

transforming the thermal image data to blood flow rate data, wherein transforming the thermal image data to blood flow rate data comprises calculating change of blood flow rate over the plurality of the frames of the thermal image data; and

classifying the person as deceptive or non-deceptive with respect to the elicited response based on the blood flow rate data.

32. The method of claim 31, wherein transforming the thermal image data comprises transforming the thermal image data using a thermodynamic model where change of blood flow rate is inversely proportional to the square of skin temperature deviation from a core temperature of a human body.

33. The method of claim 31, wherein capturing the thermal image data comprises capturing thermal image data of at least a region proximate an eye of the person.

34. The method of claim 31, wherein capturing the thermal image data comprises capturing thermal image data of more than one region of the face of the person.

35. The method of claim 31, wherein the method further comprises tracking movement of at least the region of the face of the person during the capturing of the thermal image data.

36. The method of claim 31, wherein the method further comprises providing measurement of at least one physiological parameter different than the change in blood flow rate obtained using thermal image data, and wherein classifying the person as deceptive or non-deceptive comprises determining whether the person is deceptive or non-deceptive based on the change of blood flow rate and the at least one physiological parameter.

37. The method of claim 36, wherein providing measurement of the at least one physiological parameter comprises providing measurement of at least one physiological parameters different than blood, flow rate data obtained using thermal image data using at least one invasive method.

38. A polygraph method for use in determining whether a person is being deceptive or non-deceptive with respect to a response elicited from the person, the method comprising:

capturing thermal image data from at least one region of the face of the person during at least the elicited response;

transforming the thermal image data to blood flow rate data representative of a change of blood flow rate over time in the at least one region of the face, wherein transforming the thermal image data comprises transforming the thermal image data using a thermodynamic model where change of blood flow rate is inversely proportional to the square of skin temperature deviation from a core temperature of a human body; and

classifying the person as deceptive or non-deceptive with respect to the elicited response based on the blood flow rate data.

39. The method of claim 38, wherein capturing the thermal image data comprises capturing thermal image data of at least a region proximate an eye of the person.

40. A method for use in monitoring blood flow rate, the method comprising:

providing a plurality of frames of thermal image data of at least a region of a face of a person; and

transforming the thermal image data to blood flow rare information, wherein transforming the thermal image data to blood flow rate information comprises calculating change of blood flow rate over the plurality of the frames.

41. The method of claim 40, wherein transforming the thermal image data comprises transforming the thermal image data using a thermodynamic model where change of blood flow rate is inversely proportional to the square of skin temperature deviation from a core temperature of a human body.

42. The method of claim 40, wherein providing the thermal image data comprises providing thermal image data of at least a region proximate an eye of the person.

43. The method of claim 40, wherein providing the thermal image data comprises providing thermal image data of more than one region of the face of the person.

44. The method of claim 40, wherein providing thermal image data comprises:

focusing a thermal infrared image device operable to provide thermal image data on at least the region of the face of the person;

capturing the plurality of frames of thermal image data during at least a period of time; and

tracking movement of at least the region of the face of the person.

45. The method of claim 40, wherein the method further comprises determining a physiological state of the person based on the blood flow rate information.

46. A system for use in monitoring blood flow rate, the system comprising:

a thermal infrared image device operable to provide a plurality of frames of thermal image data of at least a region of a face of a person; and

a computing apparatus operable upon the thermal image data to transform the thermal image data to blood flow rate information, wherein the transformation of the thermal image data to blood flow rate data comprises calculating change of blood flow rate over the plurality of the frames of the thermal image.

47. The system of claim 46, wherein the computing apparatus is operable to transform the thermal image data using a thermodynamic model where change of blood flow rate is inversely proportional to the square of skin temperature deviation from a core temperature of a human body.

48. The system of claim 46, wherein the computing apparatus is further operable to determine a physiological state of the person based on the blood flow rate information.

49. The system of claim 46, wherein the thermal infrared image device is operable to provide thermal image data of at least a region proximate an eye of the person.

50. The system of claim 46, wherein the thermal infrared image device is operable to capture the plurality of frames of thermal image data during at least a period of time, and further wherein the computing apparatus is further operable to track movement of at least the region of the face of the person during the period of time.

51. A method for use in monitoring blood flow rate, the method comprising:

providing thermal image data of at least a region of a face of a person; and

transforming the thermal image data to blood flow rate information, wherein transforming the thermal image data comprises transforming the thermal image data using a thermodynamic modal where change of blood flow rate is inversely proportional to the square of skin temperature deviation from a core temperature of a human body.

52. The method of claim 51, wherein providing the thermal image data comprises providing thermal image data of at least a region proximate an eye of the person.

53. The method of claim 51, wherein providing the thermal image data comprises providing thermal image data of more than one region of the face of the person.

54. The method of claim 51, wherein providing thermal image data comprises:

focusing a thermal infrared image device operable to provide thermal image data on at least the region of the face of the person;

capturing frames of thermal image data during at least a period of time; and

tracking movement of at least the region of the face of the person.

55. The method of claim 51, wherein the method further comprises determining a physiological state of the person based on the blood flow rate information.

56. A system for use in monitoring blood flow rate, the system comprising:

a thermal infrared image device operable to provide thermal image data of at least a region of a face of a person; and

a computing apparatus operable upon the thermal image data to transform the thermal image data to blood flow rate information, wherein the computing apparatus is operable to transform the thermal image data using a thermodynamic model where change of blood flow rate is inversely proportional to the square of skin temperature deviation from a core temperature of a human body.

57. The system of claim 56, wherein the computing apparatus is further operable to determine a physiological state of the person based on the blood flow rate information.

58. The system of claim 56, wherein the thermal infrared image device is operable to provide thermal image data of at least a region proximate an eye of the person.

59. The system of claim 56, wherein the thermal infrared image device is operable to capture frames of thermal image data during at least a period of time, and further wherein the computing apparatus is further operable to track movement of at least the region of the face of the person during the period of time.