Recent content by lams

@DaleSpam - This is a very helpful clarification. Your CDF widget is very cool, I'll use it to help explain the frequency filtering aspect of the model to my group once I've got it all working. Thank you!

@olivermsun - I'm applying a cutoff frequency. So I need to calculate the frequency associated with every point in my Fourier domain image and exclude pixels above the cutoff. Geometrically this gives me a circular unit step-function mask centred at the origin in the Fourier domain.

@olivermsun/DaleSpam - thank you for clarifying this point — I am currently computing the radial position of each point on my image in units of pixels, and then simply dividing each radial position by the width of the image (it's a square image). @DaleSpam - you say the "highest Fourier...

Thanks for your response. Unfortunately, my cutoff frequency relates to physical parameters I have no control over. I'm not just cleaning up signals. I really do need to be able to whack some spatial frequency axes onto my phase and magnitude plots.

This question is about converting from spatial to frequency domains when performing an FFT on 2D image data. I suspect my problem has a painfully obvious solution that I'm just not seeing. If I have some image data g(x,y) where I know the pixel resolution, say 256x256 pels at a resolution of...