httomolibgpu.misc.morph#

Module for data type morphing functions

httomolibgpu.misc.morph.data_resampler(data: <cp.ndarray>, newshape: list, axis: int = 1, interpolation: str = 'linear') → <cp.ndarray>[source]#
Down/Up-resampler of the input data implemented through interpn function.

Please note that the method will leave the specified axis dimension unchanged, e.g. (128,128,128) -> (128,256,256) for axis = 0 and newshape = [256,256].

Parameters

  • data (cp.ndarray) – 3d cupy array.

  • newshape (list) – 2d list that defines the 2D slice shape of new shape data.

  • axis (int, optional) – Axis along which the scaling is applied. Defaults to 1.

  • interpolation (str, optional) – Selection of interpolation method. Defaults to ‘linear’.

Raises

ValueError – When data is not 3D

Returns

Up/Down-scaled 3D cupy array

Return type

cp.ndarray

httomolibgpu.misc.morph.sino_360_to_180(data: <cp.ndarray>, overlap: int = 0, rotation: typing.Literal['left', 'right'] = 'left') → <cp.ndarray>[source]#

Converts 0-360 degrees sinogram to a 0-180 sinogram. If the number of projections in the input data is odd, the last projection will be discarded. See [9].

Parameters

  • data (cp.ndarray) – Input 3D data.

  • overlap (scalar, optional) – Overlapping number of pixels.

  • rotation (string, optional) – ‘left’ if rotation center is close to the left of the field-of-view, ‘right’ otherwise.

Returns

Output 3D data.

Return type

cp.ndarray