phantom

Phantom microstructures for testing: grains, misoriented cells and twins, on a reconstruction grid.

Functions

axis_angle(axis, angle_deg)	Rotation matrices about axes by angles (right-handed).
brownian_field(xy, step, scale, rms_deg, rng)	Sample a 2D Brownian random field of rotation vectors: increments grow like a random walk with distance.
polycrystal(n, step, radius, n_grains[, ...])	Make a disk-shaped polycrystal of grains with misoriented cells and twin lamellae.
random_rotations(n, rng)	Draw rotations uniformly over SO(3).
small_rotations(n, sigma_deg, rng)	Draw small rotations: rotation vectors with each component normal with standard deviation sigma_deg.
tensormap(ph, lattice_parameters, ...)	Turn a phantom from polycrystal() into a single-phase ImageD11 TensorMap, with its truth maps.
voronoi(xy, seeds)	Label points by their nearest seed.