si_wafer#

kikuchipy.data.si_wafer(allow_download: bool = False, show_progressbar: bool | None = None, **kwargs) → EBSD[source]#

EBSD dataset of (50, 50) patterns of (480, 480) pixels from a single crystal silicon wafer, acquired on a NORDIF UF-420 detector [Ånes et al., 2022].

The dataset was acquired in order to test various ways to calibrate projection centers (PCs), e.g. the moving-screen PC estimation technique [Hjelen et al., 1991]. The EBSD pattern in silicon_ebsd_moving_screen_in() is from this dataset.

Parameters:

allow_download: Whether to allow downloading the dataset from the internet to the local cache with the pooch Python package. Default is False.
show_progressbar: Whether to show a progressbar when downloading. If not given, the value of hyperspy.api.preferences.General.show_progressbar is used.
**kwargs: Keyword arguments passed to load().

Returns:

ebsd_signal: EBSD signal.

See also

silicon_ebsd_moving_screen_in, silicon_ebsd_moving_screen_out5mm
silicon_ebsd_moving_screen_out10mm

Notes

The dataset is hosted in the Zenodo repository https://doi.org/10.5281/zenodo.7491388 and comprises 311 MB as a zipped file and about 581 MB when unzipped. The zipped file is deleted after it is unzipped.

The dataset carries a CC BY 4.0 license.

Examples

>>> import kikuchipy as kp
>>> s = kp.data.si_wafer(allow_download=True, lazy=True)  
>>> s  
<EBSD, title: Pattern, dimensions: (50, 50|480, 480)>