  Starting from three-dimensional volume data of a granular packing, as e.g.
obtained by X-ray Computed Tomography, we discuss methods to first detect the
individual particles in the sample and then analyze their properties. This
analysis includes the pair correlation function, the volume and shape of the
Voronoi cells and the number and type of contacts formed between individual
particles. We mainly focus on packings of monodisperse spheres, but we will
also comment on other monoschematic particles such as ellipsoids and
tetrahedra. This paper is accompanied by a package of free software containing
all programs (including source code) and an example three-dimensional dataset
which allows the reader to reproduce and modify all examples given.
