Homotopic Object Reconstruction Using Natural Neighbor Barycentric Coordinates

  • Ojaswa Sharma
  • François Anton
Part of the Lecture Notes in Computer Science book series (LNCS, volume 6970)


One of the challenging problems in computer vision is object reconstruction from cross sections. In this paper, we address the problem of 2D object reconstruction from arbitrary linear cross sections. This problem has not been much discussed in the literature, but holds great importance since it lifts the requirement of order within the cross sections in a reconstruction problem, consequently making the reconstruction problem harder. Our approach to the reconstruction is via continuous deformations of line intersections in the plane. We define Voronoi diagram based barycentric coordinates on the edges of n-sided convex polygons as the area stolen by any point inside a polygon from the Voronoi regions of each open oriented line segment bounding the polygon. These allow us to formulate homotopies on edges of the polygons from which the underlying object can be reconstructed. We provide results of the reconstruction including the necessary derivation of the gradient at polygon edges and the optimal placement of cutting lines. Accuracy of the suggested reconstruction is evaluated by means of various metrics and compared with one of the existing methods.


Voronoi diagram natural neighbor Homotopy continuous deformations reconstruction linear cross sections 


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Copyright information

© Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Ojaswa Sharma
    • 1
  • François Anton
    • 2
  1. 1.Department of Computer Science and EngineeringIndian Institute of Technology BombayMumbaiIndia
  2. 2.Department of Informatics and Mathematical ModellingTechnical University of DenmarkLyngbyDenmark

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