threshold_mask

anri.index.threshold_mask(image, threshold=None)

Mask of the sample: the convex hull of the largest connected region above a threshold (default Otsu’s).

As ImageD11’s threshold_mask, but only the largest region (8-connected) goes into the hull: a few noisy pixels above the threshold away from the sample would otherwise stretch the hull over them.

Parameters:

• image (Array | ndarray | bool | number | bool | int | float | complex) – [ny, nx] reconstruction, e.g. from reconstruct()

• threshold (float | None, default: None) – Pixels above this are sample; default otsu() of the image

Returns:

np.ndarray – [ny, nx] bool