ewokstomo.tasks.online.preprocessing.FlatFieldCorrection#

class ewokstomo.tasks.online.preprocessing.FlatFieldCorrection[source]#

Bases: object

Applies flat field correction to tomographic projections.

Flat field correction normalizes projections by removing detector-specific artifacts using dark (background) and flat (reference) images. This correction is essential for obtaining accurate reconstructions.

Attributes#

reduced_darksdict[int, np.ndarray]: Dictionary mapping indices to reduced dark frames
reduced_flatsdict[int, np.ndarray]: Dictionary mapping indices to reduced flat frames

apply_correction(projections, projections_indices)[source]#

Apply flat field correction to projections.

Return type:: ndarray

Parameters#

projectionsnp.ndarray: Array of projections with shape (n_angles, n_z, n_x)
projections_indicesnp.ndarray: Indices of the projections in the full scan sequence

Returns#

np.ndarray: Corrected projections with the same shape as input

type projections:: ndarray
param projections:
type projections_indices:: ndarray
param projections_indices:

load_reduced_data_from_file(reduced_dark_path, reduced_flat_path, dark_first=True)[source]#

Load reduced darks and flats from HDF5 files.

Return type:: None

Parameters#

reduced_dark_pathstr: Path to the HDF5 file containing reduced dark frames
reduced_flat_pathstr: Path to the HDF5 file containing reduced flat frames
dark_firstbool, optional: If True, assign index 0 to darks and len(darks) to flats. If False, assign index 0 to flats and len(flats) to darks. Default is True.

type reduced_dark_path:: str
param reduced_dark_path:
type reduced_flat_path:: str
param reduced_flat_path:
type dark_first:: bool
param dark_first: