httomolibgpu.prep.phase

httomolibgpu.prep.phase#

Modules for phase retrieval and phase-contrast enhancement

httomolibgpu.prep.phase.paganin_filter_tomopy(tomo: <cp.ndarray>, pixel_size: float = 0.0001, dist: float = 50.0, energy: float = 53.0, alpha: float = 0.001) → <cp.ndarray>[source]#

Perform single-material phase retrieval from flats/darks corrected tomographic measurements. See [6] for a reference.

Parameters:

  • tomo (cp.ndarray) – 3D array of f/d corrected tomographic projections.

  • pixel_size (float, optional) – Detector pixel size in cm.

  • dist (float, optional) – Propagation distance of the wavefront in cm.

  • energy (float, optional) – Energy of incident wave in keV.

  • alpha (float, optional) – Regularization parameter, the ratio of delta/beta. Larger values lead to more smoothing.

Returns:

The 3D array of Paganin phase-filtered projection images.

Return type:

cp.ndarray

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