An Interactive Introduction to Fourier Transforms
Another cool FFT + image use:https://www.youtube.com/watch?v=yyox358zIRwYou can use FFT principles to isolate and remove repeated patterns in images (such as the patterns created by those textured papers of old photographs).https://www.3d4x.ch/Swift's-Reality/FFT-Photoshop-plugin-by-...I've personally used this in a project and the results are impressive.