High pass (and low pass) image filters with cutoff in “cycles per image”
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I'm trying to filter images (high-pass and low-pass) for a psychological experiment but I don't understand how i must relate the cutoff frequency expressed in "cycles per image" to the actual filter parameters.
In particular I need to create a high-pass filter with a cutoff freq of > 24 cycles/image and a low-pass filter with a cutoff freq of < 6 cycles/image. The image size is 128x128.
Can someone please point me in the right direction?
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Jonas
am 1 Jul. 2021
habe a look into this under frequency domain filtering. there you can see several functions that can be used like fwind2() and ftrans2()
come back if you are stuck again ;-)
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