Linear Time Distance Transforms for Quadtrees

Shaffer, Clifford A. and Stout, Quentin F. (1989) Linear Time Distance Transforms for Quadtrees. Technical Report TR-89-07, Computer Science, Virginia Polytechnic Institute and State University.

Abstract

Linear time algorithms are given for computing the chessboard distance transform for both pointer-based and linear quadtree representations. Comparisons between algorithmic styles for the two representations are made. Both versions of the algorithm consist of a pair of tree traversals.