How to calculate spatial frequencies in fft2 of an image

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Marina
Marina on 8 Aug 2014
Commented: Aymane on 24 Apr 2024 at 8:48
I apply fft2 on an image and get amplitudes for each spatial frequency. But what are these frequencies? How can I calculate them, knowing the size of the image in pixels and the dimension of the area in km shown on the image? I need to get these frequencies as cycles per km. Thank you.
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Aymane
Aymane on 24 Apr 2024 at 8:48
Comment estimer la fréquence spatiale prépondérante (module u et angle teta ) d'une image

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Answers (1)

Rick Rosson
Rick Rosson on 9 Aug 2014

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