University of Oulu

Fish detection automation from ARIS and DIDSON SONAR data

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Author: Ghobrial, Mina1
Organizations: 1University of Oulu, Faculty of Information Technology and Electrical Engineering, Department of Computer Science and Engineering, Computer Science and Engineering
Format: ebook
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 4.8 MB)
Pages: 60
Persistent link:
Language: English
Published: Oulu : M. Ghobrial, 2019
Publish Date: 2019-06-26
Thesis type: Master's thesis (tech)
Tutor: Heikkilä, Janne
Reviewer: Heikkilä, Janne
Pedone, Matteo


The goal of this thesis is to analyse SONAR files produced by ARIS and DIDSON manufactured by Sound Metrics Co. which are ultrasonic, monostatic and multibeam echo-sounders. They are used to capture the behaviour of Atlantic salmon, which recently has been on the lists of endangered species. These SONARs can work in dark lighting conditions and provide high resolution images due to their high frequencies that ranges from 1.1 MHz to 1.8 MHz. The thesis goes through extracting data from file, redrawing it, and visualising it in human friendly format. Next, images are analysed to search for fish. Results of analysis are saved in formats such as JSON, to allow harmony with other legacy systems. Also the output helps in future development due to the support for JSON in multitude of programming languages. Eventually, a user-friendly user interface is introduced, which helps making the process easier. The software is tested against data-sets from rivers in Finland, that are rich in Atlantic salmon.

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Copyright information: © Mina Ghobrial, 2019. This publication is copyrighted. You may download, display and print it for your own personal use. Commercial use is prohibited.