On Multi-Stack Boundary Labeling Problems

摘要

Boundary labeling is a relatively new labeling method. It targets the areas of technical drawings and medical maps, where it is often common to explain certain parts of the drawing with large text labels arranged on its boundary, so that other parts of the drawing are not obscured. According to this labeling method, we are given a rectangle R, which encloses a set of n sites. Each site S{sub}i is associated with an axis-parallel rectangular label l{sub}i. The labels must be placed in distinct positions on the boundary of R and to be connected to their corresponding sites with polygonal lines, called leaders, so that a) labels are pairwise disjoint and b) leaders do not intersect each other. In this paper, we examine labelings with more than one stacks of uniform labels on each side of R and we aim to maximize the (uniform) label size.