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The calibration data contains two different types of calibration:
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1) temperature calibration:
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The temperature calibration contains the look-up tables (LUT), which converts the digital level of the measured camera pixel into a temperature value. To do this, a proper non-uniformity correction (NUC) is needed, which is stored in form of a gain and offset image. These two images are based on the background and cold frames, which are stored in the raw data stream before T0 and T1.
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For a more detailed describtion how the NUC works, please check out the QRT wiki page.
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Functions to get the temperature calibrations are:
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download_LUT
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2) spatial calibration:
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The spatial calibration relates each pixel to a real space coordinates. It is based on a scene model. These scene models are stored for each camera in the |
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