System and method for detecting thermal anomalies

• US 7,457,441 B2
• Filed: 02/25/2005
• Issued: 11/25/2008
• Est. Priority Date: 02/25/2005
• Status: Active Grant

• Current Assignee: Aptina Imaging Corporation (ON Semiconductor Corporation)
• Original Assignee: Aptina Imaging Corporation (ON Semiconductor Corporation)
• Inventors: Hartlove, Jason
• Primary Examiner(s): Bella; Matthew C.
• Assistant Examiner(s): Strege; John B
• Application Number:
  US11/067,451
• Publication Number:
  US 20060193498A1
• Time in Patent Office: 1,369 Days
• Field of Search: 382115-118, 374/121
• US Class Current: 382/117
• CPC Class Codes: G01J 5/0025 Living bodies ear thermometers G01J5/0011; detecting, measuring or recording for diagnostic purposes A61B5/00
• CPC Class Codes: G06V 40/103 Static body considered as a whole, e.g. static pedestrian or occupant recognition
• CPC Class Codes: G16H 40/67 for remote operation

Abstract

A system and method for detecting a thermal anomaly in humans and/or livestock. In one embodiment, the system includes an image capturing component that captures a visual image of incident light in a screening area, the image capturing component further operable to determine a first coordinate in the captured image, such as the location of a person'"'"'s eyes. The system further includes a radiation capturing component operable to capture a thermal image of incident radiation in the screening area, the radiation capturing component further operable to determine an analysis area in the captured thermal image based upon the first coordinate in the captured light image. Finally, the system includes a processing component for determining thermal characteristics about the analysis area. As a result, if the thermal characteristics correspond to an alarm event, then an alarm may be triggered and the person or animal may be isolated for further health screening.

Claims

1. A system for detecting a thermal anomaly in an analysis area of a thermal image using a location of a feature in a visual image, the system comprising:

an image capturing component for capturing the visual image of incident light in a common scan area;

a radiation capturing component for capturing the thermal image of incident radiation in the common scan area; and

a processor coupled to the image and radiation capturing components for identifying the feature in the visual image, for determining a location of a feature area encompassed by the feature in the common scan area, and for establishing a location of the analysis area using the location of the feature area, the analysis area being a subset of the common scan area such that the location of the analysis area being adjacent to the location of the feature area, and the analysis area being exclusive of the feature area, wherein the processor detects a temperature characteristic in the analysis area.

2. The system of claim 1 wherein the feature captured in the image comprises a human eye.

3. The system of claim 2 wherein the analysis area comprises an area surrounding the human eye.

4. The system of claim 2 wherein the analysis area comprises an area above the human eye.

5. The system of claim 1 wherein the feature is an animal eye, and wherein the animal is livestock.

6. The system of claim 1 wherein the processor generates a signal if the radiation in the analysis area exceeds a predetermined threshold.

7. The system of claim 6 wherein the predetermined threshold comprises a threshold radiation corresponding to approximately 98.60°

Fahrenheit.

20. The system of claim 1, wherein the processor determines at least one thermal characteristic of the thermal image by exclusively using thermal data from the analysis area.

8. A method for detecting a thermal anomaly, the method comprising:

capturing an image in a screening area, the image having both visual characteristics and thermal characteristics;

identifying a location of points of interest in the captured image, the points of interest defining an area associated with an eye in the image;

determining an analysis area in the captured image based on the location of the defined area by locating the analysis area in a region of the screening area such that the analysis area and the defined area are mutually exclusive areas; and

determining at least one thermal characteristic of the analysis area.

9. The method of claim 8 wherein capturing the image further comprises capturing the image from a plurality of perspectives including a first perspective for capturing a first set of visual characteristics of the image, a second perspective for capturing a second set of visual characteristics of the image, and a third perspective for capturing a set of thermal characteristics of the image.

10. The method of claim 9 wherein identifying the location of the point of interest further comprises comparing the first set of visual characteristics from the first perspective to the second set of visual characteristics from the second perspective to yield a differential visual image that only shows the points of interest.

11. The method of claim 8 wherein the determining of the analysis area further comprises determining the analysis area to be an area surrounding the eye including a forehead associated with the eye.

12. The method of claim 8 wherein the determining of at least one thermal characteristic of the analysis area further comprises determining that thermal radiation in the analysis area exceeds a threshold radiation level.

13. The method of claim 12, further comprising determining that the thermal radiation exceeds a threshold level corresponding to an average human body temperature.

14. The method of claim 12, further comprising determining that the thermal radiation exceeds a threshold level corresponding to an average animal body temperature.

15. The method of claim 12, further comprising actuating an alarm if the thermal radiation threshold is exceeded.

16. A thermal anomaly detection system comprising:

an image capturing component operable to capture a visual image of incident light in a scan area, the image capturing component further operable to capture an image having a feature, the feature having coordinates associated with the feature in the captured image;

a radiation capturing component operable to capture a thermal image of incident radiation in the scan area, the thermal image including an analysis area that is a subset of the scan area, the location of the analysis area being based on the coordinates of the feature captured in the captured light image;

a processor operably coupled to the image capturing component and the radiation capturing component, the processor operable to determine the location of the coordinates associated with the feature, as an area encompassing the feature, and operable to determine the analysis area based on a location of the area encompassing the feature, the location of the analysis area in the scan area being adjacent to and exclusive of the area encompassing the feature; and

an identification device reader operably coupled to the processor and operable to read an identification card to initiate the capturing of the image by the image capturing component and the radiation capturing component.

17. The system of claim 16, further comprising a monitor operably coupled to the processor and operable to display the captured light image and the captured thermal image.

18. The system of claim 16, further comprising a gate operably coupled to the processor and operable to open automatically if the processor determines that no thermal characteristic in the captured thermal image exceeds a pre-determined threshold level of radiation and the gate operable to remain closed if the processor determines that at least one thermal characteristic in the captured thermal image exceeds the pre-determined threshold level of radiation.

19. The system of claim 18, further comprising an alarm system operably coupled to the processor and operable to display a visual alarm and to actuate and audible alarm when at least one thermal characteristic in the captured thermal image exceeds the pre-determined threshold level of radiation.