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Three-Dimensional Imaging by Using Singularity-Spreading Phase Unwrapping Method

  • T. Nishino
  • R. Yamaki
  • A. Hirose
Part of the Acoustical Imaging book series (ACIM, volume 29)

Abstract

When ultrasound is used to measure a three-dimensional (3D) object’s shape, the interference often results in amplitude reduction of the backscattered wave so that its arrival time cannot be calculated properly. This leads to inaccurate measurement of the distance between the ultrasonic transmitter/receiver and the object. To resolve this problem, we propose a novel method. We assume that the problem of irregular distance is the same problem as the cancellation of singular points in the so-called phase-unwrapping process. The technique that we propose cancels singular points by spreading the singularity. In this paper, we compare experimental results of our technique, the singular-spreading phase unwrapping method, and a conventional technique, the minimum cost network flow method. The experiments demonstrate that our technique performs imaging better than the conventional technique.

Key words

Three-dimensional imaging Phase unwrapping Singularity-spreading phase unwrapping 

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References

  1. 1.
    R. Yamaki, and A. Hirose, Singularity-spreading phase unwrapping, IEEE Transactions on Geoscience and Remote Sensing, 45(10), 3240–3251 (2007).CrossRefADSGoogle Scholar
  2. 2.
    M. Costantini, A novel phase unwrapping method based on neural programming, IEEE Transactions Geoscience and Remote Sensing 36(3), 813–821 (1998).CrossRefMathSciNetADSGoogle Scholar

Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  • T. Nishino
    • 1
  • R. Yamaki
    • 1
  • A. Hirose
    • 1
  1. 1.Department of Electronic EngineeringThe University of TokyoJapan

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