A Stereo-Matching Technique for Recovering 3D Information from Underwater Inspection Imagery

Title: A Stereo-Matching Technique for Recovering 3D Information from Underwater Inspection Imagery
Authors: O'Byrne, Michael
Pakrashi, Vikram
Schoefs, Franck
Ghosh, Bidisha
Permanent link: http://hdl.handle.net/10197/10352
Date: Mar-2018
Online since: 2019-05-08T13:00:22Z
Abstract: Underwater inspections stand to gain from using stereo imaging systems to collect three-dimensional measurements. Although many stereo-matching algorithms have been devised to solve the correspondence problem, that is, find the same points in multiple images, these algorithms often perform poorly when applied to images of underwater scenes due to the poor visibility and the complex underwater light field. This article presents a new stereo-matching algorithm, called PaLPaBEL (Pyramidal Loopy Propagated BELief) that is designed to operate on challenging imagery. At its core, PaLPaBEL is a semiglobal method based on a loopy belief propagation message passing algorithm applied on a Markov random field. A pyramidal scheme is adopted that enables wide disparity ranges and high-resolution images to be handled efficiently. For performance evaluation, PaLPaBEL is applied to underwater stereo images captured under various visibility conditions in a laboratory setting, and to synthetic imagery created in a virtual underwater environment. The technique is also demonstrated on stereo images obtained from a real-world inspection. The successful results indicate that PaLPaBEL is well suited for underwater application and has value as a tool for the cost-effective inspection of marine structures.
Funding Details: Science Foundation Ireland
Type of material: Journal Article
Publisher: Wiley Online Library
Journal: Computer-Aided Civil and Infrastructure Engineering
Volume: 33
Issue: 3
Start page: 193
End page: 208
Copyright (published version): 2017 Computer-Aided Civil and Infrastructure Engineering
Keywords: Underwater inspectionsPaLPaBEL (Pyramidal Loopy Propagated BELief)High-resolution imagesMarine structuresStereo correspondence algorithm
DOI: 10.1111/mice.12307
Language: en
Status of Item: Peer reviewed
Appears in Collections:Mechanical & Materials Engineering Research Collection

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