skimage.morphology.footprints:_t_shaped_element_series

Extended Summary

In the 2D case this is a T-shaped element and its rotation at multiples of 90 degrees. This series is used in efficient decompositions of disks of various radius as published in ^[1].

The generalization to the n-dimensional case can be performed by having the "top" of the T to extend in (ndim - 1) dimensions and then producing a series of rotations such that the bottom end of the T points along each of 2 * ndim orthogonal directions.