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).
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)