Thermally-directed optical processing

• US 7,491,935 B2
• Filed: 07/05/2006
• Issued: 02/17/2009
• Est. Priority Date: 07/05/2006
• Status: Active Grant

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: Case, Timothy J., Burne, Richard A., Horak, Dan T.
• Primary Examiner(s): Hannaher; Constantine
• Application Number:
  US11/481,262
• Publication Number:
  US 20080006772A1
• Time in Patent Office: 958 Days
• Field of Search: 250/332, 250/330, 348/422.1
• US Class Current: 250/330
• CPC Class Codes: G01J 2005/0077 Imaging
• CPC Class Codes: G01J 5/026 Control of working procedures of a pyrometer, other than calibration; Bandwidth calculation; Gain control
• CPC Class Codes: G01J 5/07 Arrangements for adjusting the solid angle of collected radiation, e.g. adjusting or orienting field of view, tracking position or encoding angular position optical collimating elements G01J5/0806
• CPC Class Codes: G01J 5/08 Optical arrangements
• CPC Class Codes: G01J 5/0806 Focusing or collimating elements, e.g. lenses or concave mirrors
• CPC Class Codes: G01J 5/084 Adjustable or slidable
• 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 5/0893 Arrangements to attach devices to a pyrometer, i.e. attaching an optical interface; Spatial relative arrangement of optical elements, e.g. folded beam path G01J5/049 takes precedence
• CPC Class Codes: G01J 5/10 using electric radiation detectors
• CPC Class Codes: H04N 23/11 for generating image signals from visible and infrared light wavelengths
• CPC Class Codes: H04N 5/33 Transforming infrared radiation cameras or camera modules for generating image signals from infrared radiation H04N23/20; circuitry of SSIS for transforming infrared radiation into image signals H04N25/20

Abstract

A thermally-directed optical imager and a method of thermally-directing optical processing are described. The thermally-directed imager includes a thermal image sensor, an optical image sensor, and a processor. The thermal and optical sensors respectively generate thermal image and optical image signals. The processor uses the thermal image signal to determine an optical processing region, which the processor uses to derive a compressed-image signal. The optical processing region may be determined by detecting a center of heat-mass associated with the thermal image signal or by performing an edge detection algorithm. In addition, the thermally-directed imager may be focused, zoomed, or centered via the thermal image signal.

Claims

1. A thermally-directed optical imager, comprising:

a thermal image sensor for receiving infrared radiation and generating a thermal image signal based on the received infrared radiation;

an optical image sensor for receiving optical radiation and generating an optical image signal based on the received optical radiation; and

a processor for receiving the thermal image and the optical image signals, determining an optical processing region from the thermal image signal, and processing the optical image signal based on the optical processing region, wherein an amount of processing of the optical image signal is limited based on the optical processing region.

2. The thermally-directed imager as in claim 1, wherein the processed optical image signal is a compressed-image signal.

3. The thermally-directed imager as in claim 2, further comprising a transmitter coupled with the processor for transmitting the compressed-image signal.

4. The thermally-directed imager as in claim 1, further comprising a first lens for focusing the infrared radiation and a second lens for focusing the optical radiation.

5. The thermally-directed imager as in claim 4, wherein the processor is configured to adjust a focus of at least one of the first and the second lenses based on the thermal image signal.

6. The thermally-directed imager as in claim 1, wherein the thermal sensor comprises an infrared transducer array and the optical sensor comprises at least one of a charge coupled device and a CMOS device.

7. The thermally-directed imager as in claim 1, wherein the processor is coupled to receive a temperature-range input signal for confining the optical processing region to a temperature range.

8. The thermally-directed imager as in claim 1, wherein the processor is configured to derive a center of heat-mass from the thermal image signal and use the center of mass to derive the optical processing region.

9. The thermally-directed imager as in claim 1, wherein the processor is configured to determine the optical processing region by performing an edge detection algorithm on the thermal image signal.

10. A method of thermally-directing optical processing, the method comprising using a thermal image signal to direct processing of an optical image signal, wherein an amount of processing of the optical image signal is limited based on the thermal image signal, wherein the thermal image signal is associated with infrared radiation that is reflected off an object, and wherein the optical image signal is associated with optical radiation that is reflected off the object.

11. The method as in claim 10, further comprising transmitting the processed optical image signal.

12. A method of thermally-directing optical processing, the method comprising:

receiving a thermal image signal;

determining an optical processing region based on the thermal image signal; and

processing an optical image signal using the optical processing region, wherein an amount of processing of the optical image signal is limited based on the optical processing region.

13. The method as in claim 12, further comprising:

receiving a temperature-range input signal; and

determining the optical processing region based on the temperature-range input signal.

14. The method as in claim 12, wherein determining the optical processing region further comprises detecting a center of heat-mass associated with the thermal image signal.

15. The method as in claim 14, wherein determining the optical processing region further comprises generating a processing window centered about the center of mass.

16. The method as in claim 12, wherein determining the optical processing region further comprises performing an edge detection algorithm.

17. The method as in claim 12, further comprising:

receiving infrared radiation at a thermal image sensor;

generating the thermal image signal based on the received infrared radiation;

receiving optical radiation at an optical image sensor; and

generating the optical image signal based on the received optical radiation.

18. The method as in claim 17, wherein the optical imager further comprises a lens for focusing the optical radiation.

19. The method as in claim 18, further comprising using the thermal image signal to determine an optical zoom of the lens.

20. The method as in claim 18, further comprising using the thermal image signal to center the lens.