% imfft.m - Performs 2D FFT on an image and rearranges result to place low frequencies centrally.


% imifft.m - Inverse imFFT.



% immagphase.m - Displays magnitude and phase of a matrix containing imFFT information.



% lowpassfilter.m - Creates lowpass Butterworth filter in two dimensions.


% bandpassfilter.m - Creates bandpass Butterworth filter in two dimensions.


% highpassfilter.m - Creates highpass Butterworth filter in two dimensions.


% EFilter.m - Generates a Butterworth bandpass filter of any elliptical shape.


