Remote identification of a shipwreck site from MBES backscatter

Abstract

The method described attempts to remotely identify the shape of an anthropogenic object, such as a wreck of a modern vessel, using reflectivity data from Multi-Beam Echosounder (MBES) systems. In the beam domain, the backscatter strength values – geometrically and radiometrically corrected – are used to extract a large number of Gray Level Co-occurrence Matrix (GLCM) features with different input parameters. Principal Component Analysis (PCA) is applied in order to achieve dimensionality reduction whilst a K-means algorithm clusters as “shipwreck site” a large number of beams for each line. After the geo-referencing process, a K-nearest-neighbors (K-NN) technique is applied as a filter for possible misclassifications. Finally, the shape of the shipwreck site is defined from the georeferenced beams using the α-shape method, constructing an output compatible with Geographic Information Systems (GIS).

Department

Center for Coastal and Ocean Mapping

Publication Date

11-30-2012

Volume

111

Journal Title

Journal of Environmental Management

Pages

44-52

Publisher

Elsevier

Digital Object Identifier (DOI)

10.1016/j.jenvman.2012.06.037

Document Type

Journal Article

Link to Full Text

Share

COinS