The convex hull of a regular set of integer vectors is polyhedral and   effectively computable
  Number Decision Diagrams (NDD) provide a natural finite symbolic representation for regular set of integer vectors encoded as strings of digit vectors (least or most significant digit first). The convex hull of the set of vectors represented by a NDD is proved to be an effectively computable convex polyhedron. 
Alain Finkel (LSV), J\'er\^ome Leroux (LaBRI)