- scipy.ndimage.fourier.fourier_shift(input, shift, n=-1, axis=-1, output=None)¶
Multi-dimensional fourier shift filter.
The array is multiplied with the fourier transform of a shift operation.
input : array_like
The input array.
shift : float or sequence
The size of the box used for filtering. If a float, shift is the same for all axes. If a sequence, shift has to contain one value for each axis.
n : int, optional
If n is negative (default), then the input is assumed to be the result of a complex fft. If n is larger than or equal to zero, the input is assumed to be the result of a real fft, and n gives the length of the array before transformation along the real transform direction.
axis : int, optional
The axis of the real transform.
output : ndarray, optional
If given, the result of shifting the input is placed in this array. None is returned in this case.
fourier_shift : ndarray or None
The shifted input. If output is given as a parameter, None is returned.