tf.spectral.rfft2d

tf.spectral.rfft2d

tf.spectral.rfft2d

rfft2d(
    input_tensor,
    fft_length=None,
    name=None
)

Defined in tensorflow/python/ops/spectral_ops.py.

See the guide: Spectral Functions > Fourier Transform Functions

2D real-valued fast Fourier transform.

Computes the 2-dimensional discrete Fourier transform of a real-valued signal over the inner-most 2 dimensions of input.

Since the DFT of a real signal is Hermitian-symmetric, RFFT2D only returns the fft_length / 2 + 1 unique components of the FFT for the inner-most dimension of output: the zero-frequency term, followed by the fft_length / 2 positive-frequency terms.

Args:

• input: A Tensor of type float32. A float32 tensor.
• fft_length: A Tensor of type int32. An int32 tensor of shape [2]. The FFT length for each dimension.
• name: A name for the operation (optional).

Returns:

A Tensor of type complex64. A complex64 tensor of the same rank as input. The inner-most 2 dimensions of input are replaced with their 2D Fourier transform. The inner-most dimension contains fft_length / 2 + 1 unique frequency components.

numpy compatibility

Equivalent to np.fft.rfft2