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

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.