Signal Rausch Verhältnis als verstärkungsunabhängiges Empfindlichkeitsmaß
Durch die Differenzbildung aus zwei Bildern werden restliche Inhomogenitäten, das FPN (fixed pattern noise) und die PRNU (photo response non uniformity) beseitigt.
FPN entsteht durch die Variation des Dunkelstroms von Pixel zu Pixel.
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The remaining inhomogeneous conditions, the FPN (Fixed Pattern Noise) and PRNU (Photo Response Non Uniformity) are removed by taking the difference from two images.
FPN originates from the variation of the dark current from pixel to pixel.
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