Refinement of Orthogonal Graph Drawings
Six, Janet M. and Kakoulis, Konstantinos G. and Tollis, Ioannis G. (1998) Refinement of Orthogonal Graph Drawings. In: Graph Drawing 6th International Symposium, GD’ 98, August 13-15, 1998, Montréal, Canada , pp. 302-315 (Official URL: http://dx.doi.org/10.1007/3-540-37623-2_23).
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Current orthogonal graph drawing algorithms produce drawings which are generally good. However, many times the readability of orthogonal drawings can be significantly improved with a postprocessing technique, called refinement, which improves aesthetic qualities of a drawing such as area, bends, crossings, and total edge length. Refinement is separate from layout and works by analyzing and then fine-tuning the existing drawing in an efficient manner. In this paper we define the problem and goals of orthogonal drawing refinement and introduce a methodology which efficiently refines any orthogonal graph drawing. We have implemented our technique in C++ and conducted preliminary experiments over a set of drawings from five well known orthogonal drawing systems. Experimental analysis shows our technique to produce an average 34% improvement in area, 22% in bends, 19% in crossings, and 34% in total edge length.
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