In the context of image manipulation i need to learn about 2D fourier transforms, especially about the discrete version. Can somebody recommend a book that starts at the basics and treats some practical examples?
I would like the emphasis to be on the theoretical side, as there are enough people around me that know how to apply things, but not a lot that actually know the foundations. But just to have a bit more context: practical skills i need to master are for example extracting the most prevalent orientation in an image, splitting an image into high and low frequency bands, etc.
Background knowledge can be assumed, i finished my msc in math recently (graduated in algebraic geometry but also did quite some courses on analysis). This question is because of my internship in neuroscience (vision research).
Thanks a lot!