what is spatial frequency spectra?

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Jim on 23 May 2012
I need to plot spatial frequency spectra of different kinds of papers
Can u suggest anything about this
Thanks in advance
  1 Comment
Walter Roberson
Walter Roberson on 23 May 2012
Ummm... Get samples of several kinds of paper, take images of them under carefully controlled conditions (e.g., illumination from exactly the same place each time), and then calculate and plot the spatial frequency spectrum of each one?
This reduces the problem to the question of how to plot the spatial frequency spectrum of _one_ image. I'll leave that to you, as I do not recognize those terms when put together in that combination.

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Answers (1)

Image Analyst
Image Analyst on 24 May 2012
MATLAB has the functions fft() and fft2() to help you.

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