Simulations on Reconstruction of Sound Velocity Distribution Image for Ocean Acoustic Tomography from Few Number of Projection Data

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  • YAJIMA Kuniaki
    Department of Electronic Control Engineering, Sendai National College of Technology
  • TAYAMA Norio
    Faculty of Engineering, Department of Electronic System Engineering, Iwate University

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  • 少数投影データからの海洋の音速分布画像再構成シミュレーション
  • ショウスウ トウエイ データ カラ ノ カイヨウ ノ オンソク ブンプ ガゾウ サイコウセイ シミュレーション

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Abstract

Ocean Acoustic Tomography is attracting high attention because of its usefulness for oceanographic survey. However, as the available information is insufficient, errors from the calculation are unavoidable with the past algorithm. Therefore, the new method utilizing multiple wavelets model called WPR (Wavelet Part Reconstruction) method is proposed. In this method, wavelet sampling model, multiple wavelets sampling, and SVD (Singular Value Decomposition) are used. The WPR method can be applied to the image corresponding to a large image size with high resolution using smaller volume of projection data. Then, we evaluate the reconstruction error and the calculation time by the change in the sampling function, the image size, and the number of sensors.<br>

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