Retrieval of 3D Polygonal Objects Based on Multiresolution Signatures

  • Roberto Lam
  • J. M. Hans du Buf
Part of the Lecture Notes in Computer Science book series (LNCS, volume 6939)

Abstract

In this paper we present a method for retrieving 3D polygonal objects by using two sets of multiresolution signatures. Both sets are based on the progressive elimination of object’s details by iterative processing of the 3D meshes. The first set, with five parameters, is based on mesh smoothing. This mainly affects an object’s surface. The second set, with three parameters, is based on difference volumes after successive mesh erosions and dilations. Characteristic feature vectors are constructed by combining the features at three mesh resolutions of each object. In addition to being invariant to mesh resolution, the feature vectors are invariant to translation, rotation and size of the objects. The method was tested on a set of 40 complex objects with mesh resolutions different from those used in constructing the feature vectors. By using all eight features, the average ranking rate obtained was 1.075: 37 objects were ranked first and only 3 objects were ranked second. Additional tests were carried out to determine the significance of individual features and all combinations. The same ranking rate of 1.075 can be obtained by using some combinations of only three features.

Keywords

Mathematical Morphology Mesh Resolution Mesh Erosion Polygonal Mesh Ranking Rate 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Roberto Lam
    • 1
  • J. M. Hans du Buf
    • 1
  1. 1.Institute for Systems and Robotics (ISR), Vision LaboratoryUniversity of the Algarve (ISE and FCT)FaroPortugal

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