Actually, Robert...
My Ph.D. in Geophysics and 20 years experience in industry includes a large amount of "acoustic" processing in time and frequency domain (and a few other wierd transforms too!). The concepts of Nyquist thresholds related to discretisation of data are bread-and-butter to me, and I could give you a good run for your money with Fourier transforms and obscure filter domains...
I even have some genuine experience in multiband image processing.
That said, I willingly admit I am not a front-line expert in image processing, but as with most things, I can give it a good try!
(but perhaps I'm digging myself a hole here? better to be seen as a gifted amateur than a slack professional, eh?) :-)