- title = "Recognition and assessment of seafloor vegetation using a single beam echosounder",
- author = "Yao-Ting Tseng",
- year = "2009",
- school = "Department of Imaging and Applied Physics, Centre for Marine Science and Technology, Curtin University of Technology",
- address = "Perth, Australia",
- month = feb,
- keywords = "genetic algorithms, genetic programming, GPLAB, single beam echo sounder, sea floor vegetation, recognition and assessment, plant benthos, ecological balance, environmental managers",
- bibsource = "OAI-PMH server at espace.library.curtin.edu.au",
- language = "en",
- oai = "oai:espace.library.curtin.edu.au:128517",
- rights = "unrestricted",
-
URL = "
http://espace.library.curtin.edu.au:80/R?func=dbin-jump-full&local_base=gen01-era02&object_id=128517",
- size = "246 pages",
-
abstract = "This study focuses on the potential of using a single
beam echosounder as a tool for recognition and
assessment of seafloor vegetation. Sea floor vegetation
is plant benthos and occupies a large portion of the
shallow coastal bottoms. It plays a key role in
maintaining the ecological balance by influencing the
marine and terrestrial worlds through interactions with
its surrounding environment. Understanding of its
existence on the sea floor is essential for
environmental managers.
Due to the important role of sea floor vegetation to the environment, a detailed investigation of acoustic methods that can provide effective recognition and assessment of the sea floor vegetation by using available sonar systems is necessary. One of the frequently adopted approaches to the understanding of ocean environment is through the mapping of the sea floor. Available acoustic techniques vary in kinds and are used for different purposes. Because of the wide scope of available techniques and methods which can be employed in the field, this study has limited itself to sonar techniques of normal incidence configuration relative to sea-floors in selected regions and for particular marine habitats. For this study, a single beam echo-sounder operating at two frequencies was employed. Integrated with the echo sounder was a synchronized optical system. The synchronization mechanism between the acoustic and optical systems provided capabilities to have very accurate ground truth recordings for the acoustic data, which were then used as a supervised training data set for the recognition of seaflood vegetation.
In this study, results acquired and conclusions made were all based on the comparison against the photographic recordings. The conclusion drawn from this investigation is only as accurate as within the selected habitat types and within very shallow water regions.
In order to complete this study, detailed studies of literature and deliberately designed field experiments were carried out. Acoustic data classified with the help of the synchronized optical system were investigated by several methods. Conventional methods such as statistics and multivariate analyses were examined. Conventional methods for the recognition of the collected data gave some useful results but were found to have limited capabilities. When seeking for more robust methods, an alternative approach, Genetic Programming (GP), was tested on the same data set for comparison. Ultimately, the investigation aims to understand potential methods which can be effective in differentiating the acoustic backscatter signals of the habitats observed and subsequently distinguishing between the habitats involved in this study.",
-
notes = "pdf scattered
Supervisor Prof. Alexander Gavrilov, Alec Duncan",
