Methods and systems for detecting concealed objects

• US 7,664,324 B2
• Filed: 02/21/2008
• Issued: 02/16/2010
• Est. Priority Date: 11/30/2005
• Status: Expired due to Fees

• Current Assignee: Iscon Imaging, Inc.
• Original Assignee: Iscon Video Imaging, Inc.
• Inventors: Droznin, Henry, Khodor, Leonid, Doubinina, Galina, Gorian, Izrail
• Primary Examiner(s): Desire; Gregory M
• Application Number:
  US12/034,874
• Publication Number:
  US 20090110232A1
• Time in Patent Office: 726 Days
• Field of Search: 250/332, 250/334, 250/336.1, 250/370.11, 250/341.6, 342/22, 342/27, 342/52, 342/90, 342/179, 342/197, 342/351, 382/103, 382/190, 382/100, 382/181, 382/191, 702/131, 702/134
• US Class Current: 382/181
• CPC Class Codes: G01J 5/0003 for sensing the radiant heat transfer of samples, e.g. emittance meter
• CPC Class Codes: G01J 5/02 Constructional details
• CPC Class Codes: G01J 5/025 Interfacing a pyrometer to an external device or network; User interface
• CPC Class Codes: G01J 5/026 Control of working procedures of a pyrometer, other than calibration; Bandwidth calculation; Gain control
• CPC Class Codes: G01J 5/485 Temperature profile
• CPC Class Codes: G01V 9/005 by thermal methods, e.g. after generation of heat by chemical reactions
• CPC Class Codes: G06F 18/00 Pattern recognition

Abstract

Methods and systems for detecting the presence of concealed objects. One embodiment of the method of these teachings for detecting the presence of concealed objects is passive, does not require any external radiation source, uses thermal radiation of a body as a source of radiation. Other embodiments include unique systems, devices, methods, and apparatus to determine the presence of a concealed object.

Claims

1. A system for detecting a presence of concealed objects, the system comprising:

at least one temperature modifying component modifying a temperature distribution of an emitting body, said at least one temperature modifying component comprising;

a device directing a stream of gas, heated to substantially a predetermined temperature, at the emitting body;

said at least one temperature modifying component altering a thermal balance of said emitting body;

at least one image acquisition device receiving electromagnetic radiation from the emitting body and acquiring at least one image of the emitting body from the received electromagnetic radiation; and

an analysis component identifying at least one region in said at least one image, said analysis component of receiving said at least one image from said at least one image acquisition device;

the received electromagnetic radiation from the emitting body, the emitting body having a modified temperature distribution, enabling detection of the presence of concealed objects.

2. The system of claim 1 wherein said device comprises:

a component providing a stream of gas; and

a heating component disposed to receive the stream of gas and heating the stream of gas to a predetermined temperature;

said stream of gas, after heating, being directed at the emitting body.

3. The system of claim 1 further comprising:

a display receiving at least one output image from said at least one image acquisition device.

4. The system of claim 1 wherein said analysis component also enhances an image attribute in said at least one region.

5. The system of claim 1 wherein said analysis component comprises:

a pre-processing component enhancing detectability of said at least one region in said at least one image;

said pre-processing component being receiving said at least one image from said at least one image acquisition device.

6. The system of claim 5 wherein said analysis component further comprises:

a region detecting component identifying said at least one regions in said at least one image and receiving said at least one image from said pre-processing component; and

a region analysis component determining characteristics of said at least one region.

7. The system of claim 5 wherein said preprocessing component comprises a noise reduction component increasing a signal to noise ratio in said at least one image.

8. The system of claim 7 wherein said noise reduction component is an adaptive noise reduction component.

9. The system of claim 7 wherein said preprocessing component further comprises a contrast enhancing component enhancing contrast in said at least one image.

10. The system of claim 9 wherein said preprocessing component comprises a contrast enhancing component enhancing contrast in said at least one image.

11. The system of claim 10 wherein said contrast enhancing component comprises a histogram equalization component.

12. The system of claim 11 wherein said contrast enhancing component further comprises an adaptive thresholding component binarizing an output of said histogram equalization component.

13. The system of claim 1 further comprising an optimization component;

said analysis component being an adaptive analysis component; and

said optimization component being enabling substantially optimal adaptation of said adaptive analysis component.

14. The system of claim 1 wherein said device comprises a fan.

15. The system of claim 1 wherein said stream of gas is direct at substantially perpendicular to an outer surface of the emitting body.

16. The system of claim 1 wherein said stream of gas is a pulsed stream.

17. The system of claim 16 wherein said stream of gas has a velocity substantially at the emitting body of about 800 to about 2400 feet per minute and wherein said predetermined temperature of said stream is selected to increase their temperature of the emitting body by about 20°

C. to about 40°

C.

18. The system of claim 16 wherein a distance between said at least one temperature modifying component and the emitting body is between about 30 cm to about 1 m.

19. The system of claim 1 wherein said stream of gas is a substantially continuous stream.

20. The system of claim 19 wherein said stream of gas has a velocity substantially at the emitting body of about 800 to about 2400 feet per minute and wherein said predetermined temperature of said stream is selected to increase their temperature of the emitting body by about 20°

C. to about 40°

C.

21. The system of claim 19 wherein a distance between said at least one temperature modifying component and the emitting body is between about 30 cm to about 50 cm.

22. The system of claim 1 further comprising:

a vertical transport mechanism enabling vertical displacement of said at least one temperature modifying component.

23. The system of claim 22 wherein said vertical transport mechanism comprises:

at least one substantially vertical structural member;

at least one supporting member having said at least one temperature modifying component disposed thereon;

said at least one supporting member being slidably connected to said at least one substantially vertical structural member and being capable of substantially vertical displacement; and

a transport component operatively connected to enable substantially vertical displacement of said at least one supporting member.

24. The system of claim 1 wherein said emitting body is at least partially covered by a garment;

the system further comprising a component reducing a fluid layer between at least a portion of said garment and at least a portion said emitting body covered by said at least a portion of said garment.

25. The system of claim 24 wherein said component comprises a material substantially conforming to said at least a portion of said garment and said at least a portion of said emitting body.

26. The system of claim 25 were in said material comprises an intermeshed material.

27. The system of claim 24 wherein said component comprises a suction sub-component exerting suction on said garment at at least one location;

said suction causing said garment to substantially conform to at least another portion of said emitting body at a region comprising at least another location substantially opposite to said at least one location.

28. The system of claim 1 wherein said analysis component comprises:

at least one processor; and

at least one computer usable medium having computer readable code embodied therein, the computer readable code causing said at least one processor to;

receive said at least one image from said at least one image acquisition device;

enhance detectability of at least one region in said at least one image; and

provide said at least one image with enhanced detectability to a detection component.

29. The system of claim 1 wherein said device comprises a directing component capable of substantially directing the stream of gas at the emitting body in a predetermined direction.

30. A method for detecting a presence of concealed objects, the method comprising the steps of:

altering a thermal balance of the emitting body by modifying a temperature distribution of an emitting body;

modification of the temperature distribution resulting from directing at least one stream of heated gas at the emitting body;

acquiring at least one image from electromagnetic radiation emanating from the emitting body after the temperature distribution has been modified;

enhancing detectability of at least one region in the at least one acquired image; and

providing the at least one image for detection of the presence of concealed objects.

31. The method of claim 30 further comprising the steps of:

identifying the at least one region in the at least one image; and

determining characteristics of the at least one region.

32. The method of claim 31 further comprising the step of:

enhancing an image attribute in the at least one region; and

wherein the step of providing the at least one image comprises the step of displaying the at least one image.

33. The method of claim 31 wherein at least one step from the steps of enhancing detectability of at least one region, identifying the at least one region or determining characteristics of the at least one region is performed adaptively;

and the method further comprises the step of enabling substantially optimal performance of the at least one adaptive step.

34. The method of claim 30 wherein the step of enhancing detectability of the at least one region comprises the step of increasing a signal to noise ratio in the at least one image.

35. The method of claim 34 wherein the step of enhancing detectability of the at least one region further comprises the step of enhancing contrast in the at least one image.

36. The method of claim 30 wherein said at least one stream of heated gas is directed substantially perpendicular to the emitting body.

37. The method of claim 36 wherein said at least one stream of heated gas is substantially verticality scanned over at least a portion of the emitting body.

38. The method of claim 30 wherein the emitting body is at least partially covered by a garment;

the method further comprising the step of reducing a thickness of a fluid layer between at least a portion of the garment and at least a portion the emitting body covered by said at least a portion of the garment.

39. The method of claim 30 wherein said at least one stream of heated gas is directed at the emitting body in a predetermined direction.