def reconstructImage(self):
        '''
        do inverse Fourier transform and return result
        '''
        f_ishift = np.fft.ifftshift(self.fshift)
        return np.real(np.fft.ifft2(f_ishift))
def reconstructImage ( self ) : f_ishift = np . fft . ifftshift ( self . fshift ) return np . real ( np . fft . ifft2 ( f_ishift ) )
do inverse Fourier transform and return result