Template matching for rotated images using a fast Fourier transform

Asked Sep 20 '22 at 13:01

Active Sep 20 '22 at 13:01

Viewed 17 times

I want to find a rotated fragment taken from a large image using a fast Fourier transform.

I know how to do this in case the image is not rotated. To do this, it is enough to calculate the similarity function of two images in the frequency domain and find the extremum.

How to solve the problem in the case of a rotated image?

asked Sep 20 '22 at 13:01

User48757398

1

please review [ask]. research is your responsibility. can you tell if this is mathematically even possible, with nothing but a fourier transform? at some point you'd need another transform to become rotation-invariant. – Christoph Rackwitz Sep 20 '22 at 13:31
Arbitrary rotation or multiples of 90 degrees ? – Paul R Sep 20 '22 at 15:58
@PaulR Arbitrary rotation – User48757398 Sep 20 '22 at 16:05

Template matching for rotated images using a fast Fourier transform

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