Frequency domain filtering notes
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✎ This article/section is a stub — some half-sorted notes, not necessarily checked, not necessarily correct. Feel free to ignore, or tell me about it.
Frequency space filtering notes
That is:
- do an Fourier transform
- play with the frequency-space magnitudes
- do an inverse Fourier transform
...typically with the goal of attenuating different frequencies.
Since the information in both spaces is equivalent,
such filtering makes sense whenever you can express a filter more easily in the frequency domain.