Takes the FFT of a convolution filter.
Implements Peter Kovesi's filtergrid function from his computer vision library: http://www.csse.uwa.edu.au/~pk/research/matlabfns/
Implements Peter Kovesi's lowpassfilter function from his computer vision library: http://www.csse.uwa.edu.au/~pk/research/matlabfns/
Takes the FFT of a convolution filter. This does not take into account boundary effects--that must be done before calling by using, for example, PadFFT.