Domain decomposition for a 3D image using a 3D Cartesian grid. Each unit communicates with 26 neighbors. Both send and receive commands are required. This communication cost may need to be incurred at every iteration of an algorithm (e.g. recursive median filtering).
Rao et al. BMC Cell Biology 2007 8(Suppl 1):S9 doi:10.1186/1471-2121-8-S1-S9