The problem of reconstructing some special hv-convex discretesets from their two orthogonal projections is considered. In general, the problem is known to be NP-hard, but it is solvable in polynomial time if the discrete set to be reconstructed is also 8-connected. In this paper, we define an intermediate class - the class of hv-convex canonical discrete sets - and give a constructive proof that the above problem remains computationally tractable for this class, too. We also discuss some further theoretical consequences and present experimental results as well. © Springer-Verlag Berlin Heidelberg 2009.

1 aBalázs, Péter1 aWiederhold, Petra1 aBarneva, Reneta, P uhttps://www.inf.u-szeged.hu/en/publication/reconstruction-of-canonical-hv-convex-discrete-sets-from-horizontal-and-vertical-projections