Techniques for determining emitted radiation intensity
Systems and methods according to one or more embodiments are provided for determining an emitted radiation intensity of an object in a thermal image. In one example, a system includes a memory component configured to store a plurality of captured thermal images of a scene and a processor. The processor is configured to select a pixel on a thermal image corresponding to a measured radiation intensity associated with an object in the scene. Real world coordinates of the object are determined. An emitted radiation intensity of the object is calculated using the determined real world coordinates and the measured radiation intensity. Additional systems and methods are also provided.
1. A method comprising:
capturing first and second thermal images of a scene by an image capture component;
selecting a first pixel of the first thermal image and a second pixel of the second thermal image, wherein the first and second pixels have values corresponding to first and second measured thermal radiation intensity values associated with an object in the scene;
determining coordinates of the object in the scene by:
determining a first location of the selected first pixel and a different second location of the selected second pixel, the first location and the different second location on an image plane associated with the image capture component,
determining an angle defined by the image capture component and the first location of the selected first pixel and the different second location of the selected second pixel, and
determining the coordinates of the object corresponding to the first and second pixels using the first and second measured thermal radiation intensity values and the angle; and
calculating an emitted thermal radiation intensity of the object using the determined coordinates and the first and second measured thermal radiation intensity values to compensate for attenuation associated with transmission of the emitted thermal radiation from the scene to the image capture component.
2. The method of claim 1 , further comprising:
determining a distance from the image capture component to the object using the determined coordinates; and
wherein the calculating comprises determining the emitted thermal radiation intensity using the distance and the first and second measured thermal radiation intensity values.
3. The method of claim 1 , wherein the determining coordinates comprises:
translating the image plane location to the coordinates using parameters associated with the image capture component.
4. The method of claim 3 , wherein the parameters are extrinsic parameters comprising:
a height of the image capture component;
a pan angle of the image capture component; and/or
a tilt angle of the image capture component.
5. The method of claim 4 , further comprising determining the pan angle and the tilt angle using a vanishing point on the captured thermal image.
6. The method of claim 3 , wherein the parameters are intrinsic parameters comprising:
a focal length of the image capture component;
a resolution of the image capture component; and/or
an offset of the image capture component.
7. The method of claim 6 , wherein the focal length is constant.
8. The method of claim 1 , wherein the first thermal image is captured at a first time with first coordinates of the object in the scene at the first time,
wherein the second thermal image is captured at a different second time with second coordinates of the object in the scene at the different second time, and wherein the method further comprises:
determining a speed of the object using the first and second coordinates and the first and different second times.
9. The method of claim 1 , wherein the emitted thermal radiation intensity of the object is substantially constant.
10. A system comprising:
a memory component configured to store first and second thermal images of a scene by an image capture component;
a processor configured to:
select a first pixel of the first thermal image and a second pixel of the second thermal image, wherein the first and second pixels have values corresponding to first and second measured thermal radiation intensity values associated with an object in the scene;
determine coordinates of the object in the scene by:
determining a first location of the selected first pixel and a different second location of the selected second pixel, the first location and the different second location on an image plane associated with the image capture component,
determining an angle defined by the image capture component and the first location of the selected first pixel and the different second location of the selected second pixel, and
determining the coordinates of the object corresponding to the first and second pixels using the first and second measured thermal radiation intensity values and the angle; and
calculate an emitted thermal radiation intensity of the object using the determined coordinates and the first and second measured thermal radiation intensity values to compensate for attenuation associated with transmission of the emitted thermal radiation from the scene to the image capture component.
11. The system of claim 10 , wherein the processor is further configured to:
determine a distance from the image capture component to the object using the determined coordinates; and
determine the emitted thermal radiation intensity using the distance and the first and second measured thermal radiation intensity values.
12. The system of claim 10 , wherein the processor is further configured to:
translate the image plane location to the coordinates using parameters associated with the image capture component.
13. The system of claim 12 , wherein the parameters are extrinsic parameters comprising:
a height of the image capture component;
a pan angle of the image capture component; and/or a tilt angle of the image capture component.
14. The system of claim 13 , wherein the pan angle and the tilt angle are determined using a vanishing point on the captured thermal image.
15. The system of claim 12 , wherein the parameters are intrinsic parameters comprising:
a focal length of the image capture component;
a resolution of the image capture component; and/or
an offset of the image capture component.
16. The system of claim 15 , wherein the focal length is constant.
17. The system of claim 10 , wherein the first thermal image is captured at a first time with first coordinates of the object in the scene at the first time, wherein the second thermal image of the scene by the image capture component is captured at a different second time with second coordinates of the object in the scene at the different second time, and wherein the processor is further configured to:
determine a speed of the object using the first and second coordinates and the first and different second times.
18. The system of claim 10 , wherein the emitted thermal radiation intensity of the object is substantially constant.