defrise_ellipses

odl.core.phantom.geometric.defrise_ellipses(ndim, nellipses=8, alternating=False)

Ellipses for the standard Defrise phantom in 2 or 3 dimensions.

Parameters

ndim{2, 3}

Dimension of the space for the ellipses/ellipsoids.

nellipsesint, optional

Number of ellipses. If more ellipses are used, each ellipse becomes thinner.

alternatingbool, optional

True if the ellipses should have alternating densities (+1, -1), otherwise all ellipses have value +1.

See Also

odl.core.phantom.geometric.ellipsoid_phantom :

Function for creating arbitrary ellipsoids phantoms

odl.core.phantom.transmission.shepp_logan_ellipsoids