[SciPy-user] FFT-based convolution and correlation
Wed Jul 8 10:36:47 CDT 2009
Is there a FFT-based 2D correlation function built into scipy? There are
scipy.signal.correlate2d - "the direct method implemented by convolveND will be
slow for large data"
scipy.ndimage.correlate - "The array is correlated with the given kernel using
exact calculation (i.e. not FFT)."
scipy.fftpack.convolve.convolve, which I don't really understand
Numarray had a correlate2d() function, with a 'fft=True' switch
(http://structure.usc.edu/numarray/node61.html), but I guess numarray was folded
into numpy, and I can't find if this function was included.
More information about the SciPy-user