Method and apparatus for selectively correcting fixed pattern noise based on pixel difference values of infrared images
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United States of America Patent
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Feb 23, 2021
Grant Date -
Mar 1, 2018
app pub date -
Aug 30, 2017
filing date -
Aug 31, 2016
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Abstract
A method and a thermal imaging device for correcting fixed pattern noise of in a video sequence of thermal images captured using a thermal imaging system are provided. The method includes receiving a sequence of thermal images captured using a thermal imaging system. The method also includes calculating a thermal image average of a plurality of the received thermal images and calculating pixel difference values between a received thermal image and the thermal image average. The method evaluates the pixel difference values in relation to an updating condition and calculates fixed pattern noise correction terms for the pixel difference values for which the updating condition is fulfilled. The method also includes correcting pixel values of a subsequently received thermal image with the fixed pattern noise correction terms to generate a sequence of thermal images having corrected fixed pattern noise.
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