Optically-augmented microwave imaging system and method

• US 20050270220A1
• Filed: 07/13/2005
• Published: 12/08/2005
• Est. Priority Date: 06/08/2004
• Status: Active Grant

• Current Assignee: Izhak Baharav, Robert C. Taber, Rosner S. Jeffrey
• Original Assignee: Izhak Baharav, Robert C. Taber, Rosner S. Jeffrey
• Inventors: Baharav, Izhak, Taber, Robert C., Rosner, S. Jeffrey
• Granted Patent: US 7,940,208 B2
• Time in Patent Office: Days
• US Class Current: 342/22
• CPC Class Codes: G01N 22/00 Investigating or analysing materials by the use of microwaves or radio waves, i.e. electromagnetic waves with a wavelength of one millimetre or more G01N3/00 - G01N17/00, G01N24/00 take precedence
• CPC Class Codes: G01S 13/867 Combination of radar systems with cameras
• CPC Class Codes: G01S 13/89 for mapping or imaging

Abstract

An imaging system includes an optical (visible-light or near IR) imaging system and a microwave imaging system. The optical imaging system captures an optical image of the object, produces optical image data representing the optical image and extracts optical image information from the optical image data. The microwave imaging system produces microwave image data representing a microwave image of the object in response to the optical image information.

Claims

1. An imaging system, comprising:

an optical imaging system configured to capture an optical image of an object, to produce optical image data representing the optical image and to extract optical image information from the optical image data; and

a microwave imaging system operable to illuminate the object with microwave radiation and to make microwave measurements in response thereto, said microwave imaging system being configured to produce microwave image data representing a microwave image of the object in response to the optical image information and the microwave measurements.

2. The imaging system of claim 1, wherein the microwave measurements measure a characteristic of the response of the object to the microwave radiation.

3. The imaging system of claim 1, wherein said microwave imaging system is operable in response to the optical image information to identify data points corresponding to spatial regions associated with the object, said microwave imaging system being further operable to solve for the identified data points using the microwave measurements to produce the microwave image data.

4. The imaging system of claim 3, wherein said microwave imaging system is operable to direct microwave radiation to the spatial regions in response to the optical image information.

5. The imaging system of claim 3, wherein the spatial regions are located at the perimeter of the object.

6. The imaging system of claim 3, wherein the spatial regions are located within a boundary region including at least one side of the object.

7. The imaging system of claim 3, wherein the spatial regions enable said microwave imaging system to solve for the data points in a volume occupied by the object.

8. The imaging system of claim 1, wherein said microwave imaging system is operable to track motion of the object in response to the optical image information.

9. The imaging system of claim 1, wherein said optical imaging system comprises:

a light source arranged to illuminate the object; and

a sensor for producing the optical image data in response to light reflected by the object.

10. The imaging system of claim 1, wherein said microwave imaging system comprises:

a microwave node configured to direct microwave radiation towards the object and receive reflected microwave radiation from the object.

11. An imaging processing system, comprising:

a processor connected to receive optical image data representing an optical image of an object, said processor being operable to extract optical image information from the optical image data, to receive microwave measurements responsive to illumination of the object with microwave radiation and to produce microwave image data representing a microwave image of the object in response to the optical image information and the microwave measurements.

12. The image processing system of claim 11, wherein said processor includes an optical image processor operable to extract the optical image information and a microwave image processor connected to receive the optical image information from the optical image processor and to receive the microwave measurements, said microwave image processor being operable to produce the microwave image data in response to the optical image information and the microwave measurements.

13. The image processing system of claim 12, wherein said microwave image processor is further operable to identify data points corresponding to spatial regions associated with the object in response to the optical image information, said microwave image processor being further operable to solve for the identified data points using the microwave measurements to produce the microwave data.

14. The image processing system of claim 13, wherein said microwave image processor is operable in response to the optical image information to cause the microwave radiation to be directed to the spatial regions.

15. The image processing system of claim 12, wherein said microwave image processor is further operable in response to the optical image information to track motion of the object.

16. A method for imaging an object, the method comprising:

acquiring optical image data representing an optical image of an object;

extracting optical image information from the optical image data; and

producing microwave image data representing a microwave image of the object in response to the optical image information and microwave measurements taken responsive to illumination of the object with microwave radiation.

17. The method of claim 16, wherein said producing further comprises:

using the optical image information to identify data points corresponding to spatial regions associated with the object; and

solving for the identified data points using the microwave measurements.

18. The method of claim 17, further comprising:

directing the microwave radiation to the spatial regions using the optical image information.

19. The method of claim 16, wherein said producing further comprises:

tracking motion of the object in response to the optical image information to produce the microwave image data.

20. The method of claim 16, wherein said acquiring further comprises:

illuminating the object with light;

receiving light reflected from the object; and

producing the optical image data in response to the reflected light.

21. The method of claim 16, wherein said producing further comprises:

illuminating the object with microwave radiation; and

receiving microwave radiation reflected by the object.