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Smoothing a Network of Planar Polygonal Lines Obtained with Vectorization

  • Alexander Gribov
  • Eugene Bodansky
Part of the Lecture Notes in Computer Science book series (LNCS, volume 5046)

Abstract

A new method of smoothing polygonal lines obtained as the result of vectorization and creating the network is suggested. This method performs not only smoothing but also filtering of vectorization errors taking into account that these errors appear not only as the errors of vertices but as errors of node coordinates as well. An important part of this algorithm is a technique of building piecewise polynomial base functions for local approximation of the polylines of the network. The suggested algorithm has a linear computational complexity for exponential weight functions. The necessity of using finite weight functions is shown. Algorithms of calculating tangents and curvatures are derived. Shrinking errors and errors of parameters are analyzed. A method of compensation of the shrinking errors is suggested and how to do smoothing with variable intensity is shown.

Keywords

smoothing error filtering local approximation polygonal lines network of polylines weight functions vectorization line drawings 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2008

Authors and Affiliations

  • Alexander Gribov
    • 1
  • Eugene Bodansky
    • 1
  1. 1.Environmental Systems Research Institute (ESRI)RedlandsUSA

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