fourier.py 文件源码

def adj_op(self, x):
        """ This method calculates inverse masked Fourier transform of a 2-D
        image.

        Parameters
        ----------
        x: np.ndarray
            masked Fourier transform data.

        Returns
        -------
        img: np.ndarray
            inverse 2D discrete Fourier transform of the input coefficients.
        """
        return pfft.ifft2(self._mask * x)