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Method of shutterless non-uniformity correction for infrared imagers

  • US 9,251,595 B2
  • Filed: 03/14/2014
  • Issued: 02/02/2016
  • Est. Priority Date: 03/15/2013
  • Status: Active Grant
First Claim
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1. A method of correcting an infrared image, the method comprising:

  • providing a processor;

    receiving the infrared image from a thermal camera, the infrared image comprising a plurality of pixels arranged in an input image array, a first pixel in the plurality of pixels having a first pixel value and one or more neighbor pixels with one or more neighbor pixel values, wherein the first pixel and the one or more neighbor pixels are associated with an object in the infrared image, the one or more neighbor pixels being adjacent to the first pixel in the input image array;

    updating, by the processor, a correction array having a plurality of correction pixel values, wherein the correction array is updated by, for each correction pixel value;

    determining correction pixel values for the one or more neighbor pixels;

    computing a difference between a first correction value of the first pixel value and one or more correction pixel values for the one or more neighbor pixels;

    updating the correction pixel value using the computed difference; and

    providing an output image array based on the correction array and the input image array.

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