NDLI: Processing and Analysis of Underwater Acoustic Images Generated by Mechanically Scanned Sonar Systems

Content Provider	IEEE Xplore Digital Library
Author	Trucco, A. Garofalo, M. Repetto, S. Vernazza, G.
Copyright Year	1963
Abstract	The processing and analysis of images generated by mechanically scanned sonar systems have received poor attention despite their widespread application. In this paper, some efficient methods for acoustic image enhancement and automatic object detection are presented and assessed using a large set of experimental data collected at sea with commercial sonar systems. Specifically, a set of methods for increasing the quality of the gray-level images produced by a fan-shaped-beam sonar is introduced. Such a set includes a dynamic brightness assignment, a precise interpolation, a speckle-reduction filter, and a contrast-enhancement block. Two versions of a template-matching-based method that allows the automatic detection of a simple object contained in a region scanned with a pencil-beam sonar are also proposed and assessed. The main difficulty to be coped with in this field is related to the sparseness of the binary maps generated by this sonar system. The performance and robustness of the proposed techniques have been evaluated using real data that provided satisfactory results for both the image-enhancement and the object-detection tasks. Moreover, the computational burden of most of the proposed techniques turned out to be quite limited, and their real-time implementation with a standard computer architecture could be estimated.
Sponsorship	IEEE Instrumentation and Measurement Society Bureau international des poids et mesures IEEE International Bureau of Weights and Measures (BIPM) URSI NBS Agency Ind. Sci. & Technol., Min. Int. Trade & Ind. Sci. Council Japan International Union of Pure and Applied Physics (IUPAP) NIST NRCC National Conference of Standards Laboratories (NCSL) Allen Osborne Associates Andeen-Hagerling, Inc. Ballantine Lab. Inc. Clarke-Hess Communications Research Corp. Fluke Corporation Guildline Instruments Hewlett-Packard Co. Julie Res. Lab. Inc. Keithley Instruments, Inc. Measurements International Ltd. Canada QuadTech Inc. Quantum Design Inc. Rotek Instrum. Corp. Tegam Inc. Tektronix Inc
Starting Page	2061
Ending Page	2071
Page Count	11
File Size	743046
File Format	PDF
ISSN	00189456
Volume Number	58
Issue Number	7
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-07-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Image analysis Underwater acoustics Image generation Sonar detection Object detection Sonar applications Image enhancement Brightness Interpolation Filters underwater imaging Acoustic imaging contrast enhancement fan-shaped-beam sonar system image analysis image processing interpolation mechanically scanned sonar system object detection pencil-beam sonar system speckle reduction
Content Type	Text
Resource Type	Article
Subject	Instrumentation Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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