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A Novel Method for Sidescan Sonar Image Segmentation

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2 Author(s)
Celik, T. ; Sch. of Eng., Univ. of Warwick, Coventry, UK ; Tjahjadi, T.

In this paper, we propose a novel unsupervised algorithm for segmenting sidescan sonar images of seafloor. The proposed algorithm does not make any a priori assumption on the nature of the input sidescan sonar image. The algorithm first constructs a multiresolution representation of the input image using the forward and inverse undecimated discrete wavelet transform (UDWT). A feature vector is then extracted for each pixel using both intra-resolution and inter-resolution data. The dimensionality of each feature vector is reduced using principal component analysis (PCA). The feature vectors are then clustered into disjoint clusters using k-means clustering. The number of clusters is estimated automatically. Experimental results on real sonar images confirm the effectiveness of the proposed algorithm.

Published in:

Oceanic Engineering, IEEE Journal of  (Volume:36 ,  Issue: 2 )