tomocupy.retrieve_phase

Paganin phase retrieval implementation copied from tomopy

Functions:

paganin_filter(data[, pixel_size, dist, ...])

Perform single-step phase retrieval from phase-contrast measurements [B2].
tomocupy.retrieve_phase.paganin_filter(data, pixel_size=0.0001, dist=50, energy=20, alpha=0.001, method='paganin', db=1000, W=0.0002, pad=True)[source]

Perform single-step phase retrieval from phase-contrast measurements [B2].

Parameters:

  • tomo (ndarray) – 3D tomographic data.

  • 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 for Paganin method.

  • method (string) – phase retrieval method. Standard Paganin or Generalized Paganin.

  • db (float, optional) – delta/beta for generalized Paganin phase retrieval

  • W (float) – Characteristic transverse lenght scale

  • pad (bool, optional) – If True, extend the size of the projections by padding with zeros.

Returns:

ndarray – Approximated 3D tomographic phase data.