System and method for eye safe detection of unknown targets

• US 8,994,934 B1
• Filed: 11/10/2011
• Issued: 03/31/2015
• Est. Priority Date: 11/10/2010
• Status: Active Grant

• Current Assignee: Chemimage Corporation
• Original Assignee: Chemimage Corporation
• Inventors: Nelson, Matthew, Treado, Patrick, Schweitzer, Robert, D'Agostino, Robert
• Primary Examiner(s): Ton, Tri T
• Assistant Examiner(s): MERRELL II, WILLIE C
• Application Number:
  US13/373,333
• Time in Patent Office: 1,237 Days
• US Class Current: 356/73
• CPC Class Codes: G01J 2005/0077 Imaging
• CPC Class Codes: G01J 3/02 Details
• CPC Class Codes: G01J 3/027 Control of working procedures of a spectrometer; Failure detection; Bandwidth calculation
• CPC Class Codes: G01J 3/44 Raman spectrometry; Scattering spectrometry ; Fluorescence spectrometry
• CPC Class Codes: G01J 5/0846 having multiple detectors for performing different types of detection, e.g. using radiometry and reflectometry channels
• CPC Class Codes: G01J 5/0859 Sighting arrangements, e.g. cameras
• CPC Class Codes: G01N 33/0057 for warfare agents or explosives properties of explosives G01N33/227
• CPC Class Codes: H04N 23/611 where the recognised objects include parts of the human body

Abstract

The present disclosure provides for a system and method for detecting and identifying unknown targets. At least one region of interest comprising an unknown target in a sample scene may be targeted using SWIR spectroscopic techniques. A region of interest may be surveyed to thereby determine whether or not a human is present. This surveying may be achieved my assessing LWIR data, data acquired from motion sensors, and combinations thereof. If no human is present in a region of interest, the region may be interrogated using Raman spectroscopic techniques to thereby obtain a Raman data set representative of the region of interest. This Raman data set may be assessed to thereby identify said unknown target. This assessment may be achieved by comparing the Raman data set to a reference data sets in a reference database, where each reference data set is associated with a known target.

Claims

1. A method comprising:

targeting at least one region of interest in a sample scene comprising at least one unknown target by

generating at least one SWIR data set representative of the sample scene, and

analyzing the at least one SWIR data set to identify the region of interest;

surveying the region of interest to determine one or more of human presence in the region of interest and no human presence in the region of interest, wherein if no human presence is detected, the method further comprises identifying the unknown target by

illuminating the region of interest to generate a plurality of interacted photons;

assessing the plurality of interacted photons to generate at least one Raman data set of the interacted photons; and

analyzing the at least one Raman data set to identify the unknown target.

2. The method of claim 1, wherein the surveying further comprises

generating at least one LWIR data set representative of one or more of the sample scene, the region of interest, and combinations thereof;

and

analyzing the at least one LWIR data set to determine one or more of human presence in the region of interest and no human presence in the region of interest.

3. The method of claim 1, wherein the surveying further comprises sensing for motion to determine one or more of human presence in the region of interest and no human presence in the region of interest.

4. The method of claim 1 further comprising:

illuminating the region of interest to generate a plurality of interacted photons of the region of interest;

generating at least one LWIR data set from the plurality of interacted photons; and

analyzing the at least one LWIR data set to determine one or more of human presence in the region of interest and no human presence in the region of interest, and if at least one human presence is detected in the region of interest, ceasing the illuminating, wherein the illuminating, generating and analyzing are performed substantially simultaneously.

5. The method of claim 1, further comprising passing the plurality of interacted photons through a fiber array spectral translator device.

6. The method of claim 1, further comprising providing at least one Raman reference database comprising at least one Raman reference data set, wherein each Raman reference data set corresponds to at least one known target.

7. The method of claim 1, wherein analyzing the at least one SWIR data set further comprises comparing the at least one SWIR data set to at least one reference data set.

8. The method of claim 6, wherein analyzing the Raman data set further comprises comparing the at least one Raman data set to at least one reference Raman data set.

9. The method of claim 1, further comprising filtering the plurality of interacted photons.

10. The method of claim 1, wherein the at least one SWIR data set comprises one or more of a SWIR spectrum, a spatially accurate wavelength resolved SWIR image, and combinations thereof.

11. The method of claim 1, wherein the at least one SWIR data set comprises a hyperspectral SWIR image.

12. The method of claim 2, wherein the at least one LWIR data set comprises one or more of a LWIR spectrum, a LWIR image, and combinations thereof.

13. The method of claim 2, wherein the at least one LWIR data set comprises a hyperspectral LWIR image.

14. The method of claim 1, wherein the at least one Raman data set comprises one or more of a Raman spectrum, a spatially accurate wavelength resolved Raman image, and combinations thereof.

15. The method of claim 1, wherein the at least one Raman data set comprises a Raman hyperspectral image.

16. The method of claim 1, wherein the surveying further comprises applying one or more of an object detection algorithm, an object tracking algorithm, and combinations thereof.

17. The method of claim 1, further comprising outputting a video image of one or more of the sample scene, the region of interest, and combinations thereof.

18. A non-transitory storage medium containing machine readable program code, which, when executed by a processor, causes the processor to perform the following:

identify a sample scene by causing a first detector to generate at least one SWIR data set representative of the sample scene, and

analyze the at least one SWIR data set to identify a region of interest within the sample scene, wherein the region of interest comprises an unknown target;

survey the region of interest to determine one or more of human presence in the region of interest and no human presence in the region of interest, wherein if no human presence is detected,

identify the unknown target by

illuminating the region of interest to generate a plurality of interacted photons;

causing a second detector to generate at least one Raman data set of the unknown target; and

analyzing the Raman data set to identify the unknown target.

19. The non-transitory storage medium of claim 18 which when executed by a processor further causes the processor to survey the region of interest by causing a third detector to generate at least one LWIR data set of one or more of the sample scene, the region of interest, and combinations thereof.

20. The non-transitory storage medium of claim 19, which, when executed by a processor, further causes the processor compare one or more of the at least one SWIR data set, at least one LWIR data set, and at least one Raman data set to at least one reference data set in a reference database, wherein each reference data set is associated with a known target.

21. The non-transitory storage medium of claim 19, which, when executed by a processor, further causes the processor to communicate with at least one motion sensor to assess movement in one or more of a sample scene, a region of interest, and combinations thereof.

22. The non-transitory storage medium of claim 19, which, when executed by a processor, further causes the processor to obtain and analyze at least one LWIR data set substantially simultaneously while causing an illumination source to illuminate the region of interest to determine one or more of the presence of at least one human in the region of interest and no human presence in the region of interest, and if at least one human is detected in the region of interest, cause the illumination source to cease illuminating.