shepp_logan¶

odl.phantom.transmission.shepp_logan(space, modified=False, min_pt=None, max_pt=None)[source]¶

Standard Shepp-Logan phantom in 2 or 3 dimensions.

Parameters

spaceDiscretizedSpace

Space in which the phantom is created, must be 2- or 3-dimensional. If space.shape is 1 in an axis, a corresponding slice of the phantom is created.

modifiedbool, optional

True if the modified Shepp-Logan phantom should be given. The modified phantom has greatly amplified contrast to aid visualization.

min_pt, max_ptarray-like, optional

If provided, use these vectors to determine the bounding box of the phantom instead of space.min_pt and space.max_pt. It is currently required that min_pt >= space.min_pt and max_pt <= space.max_pt, i.e., shifting or scaling outside the original space is not allowed.

Providing one of them results in a shift, e.g., for min_pt:

new_min_pt = min_pt
new_max_pt = space.max_pt + (min_pt - space.min_pt)

Providing both results in a scaled version of the phantom.