def translate_fourier(image, dx):
    """ Translate an image in fourier-space with plane waves """
    N = image.shape[0]

    f = 2*np.pi*np.fft.fftfreq(N)
    kx,ky,kz = np.meshgrid(*(f,)*3, indexing='ij')
    kv = np.array([kx,ky,kz]).T

    q = np.fft.fftn(image)*np.exp(-1.j*(kv*dx).sum(axis=-1)).T
    return np.real(np.fft.ifftn(q))
def translate_fourier(image, dx):
    """ Translate an image in fourier-space with plane waves """
    N = image.shape[0]

    f = 2*np.pi*np.fft.fftfreq(N)
    kx,ky,kz = np.meshgrid(*(f,)*3, indexing='ij')
    kv = np.array([kx,ky,kz]).T

    q = np.fft.fftn(image)*np.exp(-1.j*(kv*dx).sum(axis=-1)).T
    return np.real(np.fft.ifftn(q))
def translate_fourier ( image , dx ) : N = image . shape [ 0 ] f = 2 * np . pi * np . fft . fftfreq ( N ) kx , ky , kz = np . meshgrid ( * ( f , ) * 3 , indexing = 'ij' ) kv = np . array ( [ kx , ky , kz ] ) . T q = np . fft . fftn ( image ) * np . exp ( - 1.j * ( kv * dx ) . sum ( axis = - 1 ) ) . T return np . real ( np . fft . ifftn ( q ) )
Translate an image in fourier-space with plane waves
Translate an image in fourier - space with plane waves