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I have some alloy microstructure images, showing elongated grains (darker colours) and the grain boundaries (lighter colours). If I take the Fourier transform of the image, there are directional bands in the Fourier image.

Is there a relationship between the angle of these bands in the Fourier image and the orientation of the grain boundaries in the real space image?

Another observation is that if high frequencies are removed, and the inverse Fourier transform is taken, a significant amount of noise is removed, and I am mostly left with the grain boundaries of the microstructure. Is there any other kind of useful information that can be extracted from the Fourier image?

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    $\begingroup$ The added tag might not only be useful overall, but will also help to get this unanswered question bumped up. Also, can the last paragraph not be a separate question? Asking 2 questions in one might make it seem more difficult for some people to answer. $\endgroup$ – Nike Dattani Jun 12 at 22:48
  • $\begingroup$ It is a really interesting question. But I have a problem, wanting to know whether an image was uploaded because I cannot see any image. $\endgroup$ – lee Jul 28 at 13:07
  • $\begingroup$ @lee there was no image posted, but that may assist people if the OP can add these images. $\endgroup$ – Tyberius Aug 3 at 19:43

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