title: On the recognition of properties of three-dimensional pictures.
abstract: This correspondence proposes one-pass algorithms that compute the numbers of objects, cavities, and holes in three-dimensional (3-D) digital pictures. Also, it is shown that a one-way, 3-D parallel/sequential acceptor cannot accept the class of 3-D binary arrays in which the set of 1's is connected, unlike the situation in the two-dimensional (2-D) case; but it can do so if multipasses are allowed.
authors.affiliation: Computer Science Center, University of Maryland, College Park, MD 20742; Department of Applied Mathematics, Hiroshima University, Higashi-Hiroshima, 724 Japan.
authors.forename: A
authors.initials: A
authors.lastname: Nakamura
authors.forename: K
authors.initials: K
authors.lastname: Aizawa