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Item An Algorithm for Constructing a Quadtree from Polygonal Regions(Blackwell Publishing Ltd and the Eurographics Association, 1984) Casciani, T.; Falcidieno, B.; Fasciolo, G.; Pienovi, C.Quadtrees are a class of hierarchical data structures particularly suitable for the representation of images in a compact form. In this paper a new algorithm is described which builds up the quadtree corresponding to polygonal multiply connected regions starting from their boundary representation.