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Replace outdated PyTorch FFT functions. #41

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Replace outdated PyTorch FFT functions. #41

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6 changes: 3 additions & 3 deletions torch_radon/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -93,14 +93,14 @@ def filter_sinogram(self, sinogram, filter_name="ramp"):

padded_sinogram = F.pad(sinogram.float(), (0, pad, 0, 0))
# TODO should be possible to use onesided=True saving memory and time
sino_fft = torch.rfft(padded_sinogram, 1, normalized=True, onesided=False)
sino_fft = torch.fft.fft(padded_sinogram)

# get filter and apply
f = self.fourier_filters.get(padded_size, filter_name, sinogram.device)
filtered_sino_fft = sino_fft * f
filtered_sino_fft = sino_fft * f.squeeze(2).unsqueeze(1)

# Inverse fft
filtered_sinogram = torch.irfft(filtered_sino_fft, 1, normalized=True, onesided=False)
filtered_sinogram = torch.real(torch.fft.ifft(filtered_sino_fft))

# pad removal and rescaling
filtered_sinogram = filtered_sinogram[:, :, :-pad] * (np.pi / (2 * n_angles))
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