Bathymetry Determination From Marine Radar Image Sequences Using the Hilbert Transform

This letter presents an image processing technique based on the theory of the Hilbert transform to determine the coastal bathymetry from marine radar image sequences. Use of the Hilbert transform enables the difficulties and complications of inhomogeneous image analysis to be avoided. In addition, a...

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Published in:IEEE geoscience and remote sensing letters 2017-05, Vol.14 (5), p.644-648
Main Authors: Wu, Li-Chung, Doong, Dong-Jiing, Wang, Jong-Hao
Format: Article
Language:English
Subjects:
Bathymetry
Bathymetry determination
Coastal bathymetry
Coastal environments
Complications
Computer simulation
Hilbert transform
Hilbert transformation
Image analysis
Image processing
Image sequences
marine radar
Mathematical models
Numerical analysis
Radar
Radar imaging
Radar remote sensing
Radar signal processing
Satellite image processing
Sea surface
Surface waves
Transforms
Wave period
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creator Wu, Li-Chung
Doong, Dong-Jiing
Wang, Jong-Hao
description This letter presents an image processing technique based on the theory of the Hilbert transform to determine the coastal bathymetry from marine radar image sequences. Use of the Hilbert transform enables the difficulties and complications of inhomogeneous image analysis to be avoided. In addition, a number of steps and complex computations can be avoided using the numerical algorithm of the Hilbert transform. Because the Hilbert transform is suitable for only monocomponent signals, we first applied the image procedure to decompose the irregular wave patterns into different single wave period images. Analysis of the simulated wave field and radar image sequences demonstrated that there was a high correlation between the estimated depths and reference depths. The causes for errors in the bathymetry estimations are also discussed.
doi_str_mv 10.1109/LGRS.2017.2668383
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source IEEE Electronic Library (IEL) Journals
subjects Bathymetry
Bathymetry determination
Coastal bathymetry
Coastal environments
Complications
Computer simulation
Hilbert transform
Hilbert transformation
Image analysis
Image processing
Image sequences
marine radar
Mathematical models
Numerical analysis
Radar
Radar imaging
Radar remote sensing
Radar signal processing
Satellite image processing
Sea surface
Surface waves
Transforms
Wave period
title Bathymetry Determination From Marine Radar Image Sequences Using the Hilbert Transform
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