Remote identification of a shipwreck site from MBES backscatter
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).
Center for Coastal and Ocean Mapping
Journal or Conference Title
Journal of Environmental Management
Digital Object Identifier (DOI)
Giuseppe Masetti, Brian Calder, Remote identification of a shipwreck site from MBES backscatter, Journal of Environmental Management, Volume 111, 30 November 2012, Pages 44-52, ISSN 0301-4797, http://dx.doi.org/10.1016/j.jenvman.2012.06.037. (http://www.sciencedirect.com/science/article/pii/S0301479712003520)