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Quadtree traversal algorithms for pointer-based and depth-first representations

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1 Author(s)
D. R. Fuhrmann ; Washington Univ., St. Louis, MO, USA

Simple top-down pointer-based quadtree traversal algorithms for four-neighbor traversal, eight-neighbor traversal, and connected-component labeling are proposed. It is shown that for this class of algorithms there exist efficient pointer-based representations that can require as little as 2N bytes, where N is total number of nodes in the tree. The algorithms can also be implemented using a depth-first quadtree representation, at the cost of additional nonrecursive walks over the data structure to locate the arbitrary sons of interior nodes

Published in:

IEEE Transactions on Pattern Analysis and Machine Intelligence  (Volume:10 ,  Issue: 6 )