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Radiometric correction and alignment techniques for thermal imager with non-contact temperature sensor

  • US 10,598,550 B2
  • Filed: 02/15/2018
  • Issued: 03/24/2020
  • Est. Priority Date: 02/17/2017
  • Status: Active Grant
First Claim
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1. A method comprising:

  • capturing a thermal image of a scene by an array of infrared sensors of an imaging system, wherein the thermal image comprises a plurality of pixel values;

    detecting, by a non-contact temperature sensor, a temperature value associated with a portion of the scene;

    determining an alignment of the temperature sensor relative to the array;

    identifying a correspondence between the portion of the scene and a subset of the pixel values based on the alignment of the temperature sensor relative to the array;

    comparing the subset of pixel values with the detected temperature value;

    generating a correction term based on the comparing; and

    applying the correction term to at least the subset of pixel values to radiometrically calibrate the subset of pixel values.

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