A Continuous Max-Flow Approach to Multi-Labeling Problems under   Arbitrary Region Regularization
  The incorporation of region regularization into max-flow segmentation has traditionally focused on ordering and part-whole relationships. A side effect of the development of such models is that it constrained regularization only to those cases, rather than allowing for arbitrary region regularization. Directed Acyclic Graphical Max-Flow (DAGMF) segmentation overcomes these limitations by allowing for the algorithm designer to specify an arbitrary directed acyclic graph to structure a max-flow segmentation. This allows for individual 'parts' to be a member of multiple distinct 'wholes.' 
John S.H. Baxter, Martin Rajchl, Jing Yuan, and Terry M. Peters
cs.CV