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<p><b>Abstract</b>—An algorithm that decomposes a line image into singular and regular regions is presented. We define a contour trapezoid as the building block of regular regions, and postulate a Maximal Trapezoid Set as the core of regular regions. Then, we describe an algorithm that calculates a Maximal Trapezoid Set of a polygon and show how to use it to find a skeleton of a polygonal approximation of a contour. Experiments are explained to show the behavior of the new concept on real images as compared to previous algorithms.</p>
Contour trapezoid, maximal trapezoid set, regular region, singular region, skeleton.
Jairo Rocha, Rafael Bernardino, "Singularities and Regularities on Line Pictures via Symmetrical Trapezoids", IEEE Transactions on Pattern Analysis & Machine Intelligence, vol. 20, no. , pp. 391-395, April 1998, doi:10.1109/34.677264
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