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  • Research Article
  • Open Access

Efficient and Low-Cost 3D Structured Light System Based on a Modified Number-Theoretic Approach

EURASIP Journal on Advances in Signal Processing20092010:474389

  • Received: 8 May 2009
  • Accepted: 24 October 2009
  • Published:


3D scanning based on structured light (SL) has been proven to be a powerful tool to measure the three-dimensional shape of surfaces, especially in biomechanics. We define a set of conditions that an optimal SL strategy should fulfill in the case of static scenes and then we present an efficient solution based on improving the number-theoretic approach (NTA). The proposal is compared to the well-known Gray code (GC) plus phase shift (PS) technique and the original NTA, all satisfying the same set of conditions but obtaining significant improvements with our implementation. The technique is validated in biomechanical applications such as the scanning of a footprint left on a "foam box" typically made for that purpose, where one of the ultimate goals could be the production of a shoe insole.


  • Foam
  • Information Technology
  • Phase Shift
  • Quantum Information
  • Shoe

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Authors’ Affiliations

Faculty of Electrical Engineering and Computing, University of Zagreb, Unska 3, 10000 Zagreb, Croatia
Institute of Informatics and Applications, University of Girona, Avenue Lluis Santalo s/n, 17071 Girona, Spain


© Tomislav Pribanić et al. 2010

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.