function
f = auto(a)
%
% AUTO
% f = auto(a)
% returns as f the auto-correlation of image a.
f = fft2(a);
f = f.*conj(f);
f = ifft2(f);
f = fftshift(f);
f = real(f);
f = f/max(max(f));
Maintained by
John Loomis
, last updated
8 March 2000