Texture-based detection of sea wave direction

Vassilia Karathanassi; Kostas Topouzelis; Demetris Sarantopoulos

doi:10.1117/12.564631

22 October 2004 Texture-based detection of sea wave direction

Vassilia Karathanassi, Kostas Topouzelis, Demetris Sarantopoulos

Proceedings Volume 5574, Remote Sensing for Environmental Monitoring, GIS Applications, and Geology IV; (2004) https://doi.org/10.1117/12.564631
Event: Remote Sensing, 2004, Maspalomas, Canary Islands, Spain

Abstract

Various phenomena in the radar imaging mechanism, such as velocity bunching, azimuthal cutoff, tilt modulation, range dependence etc affect the SAR image. Among them, velocity bunching and azimuthal cutoff, straightly related to SAR azimuth direction, have been most investigated. However, in this study, the range factor, mainly due to lower radar image intensity for far range, is proved to be more pronounced. In the study framework, 2nd order texture analysis was performed in order to investigate a) the potential of texture to detect wave direction, b) wave range dependence, and c) velocity bunching effects. For this purpose, the Haralick Cooccurrence matrix was calculated on a despeckled ERS2 image for four directions. Eight texture images were generated and compared to the wave direction resulting from the TOPEX/POSEIDON model. The comparison showed that a) the texture image produced in the range direction detected sea wave direction efficiently, and b) accuracy was affected by the range factor. Thus, a range correction was proposed and implemented on the despeckled texture images. Following this correction, an accuracy of 88.6% was achieved for wave direction detection, if texture is calculated along the range direction and 74.9% if texture is calculated along the azimuth direction.

Citation Download Citation

Vassilia Karathanassi, Kostas Topouzelis, and Demetris Sarantopoulos "Texture-based detection of sea wave direction", Proc. SPIE 5574, Remote Sensing for Environmental Monitoring, GIS Applications, and Geology IV, (22 October 2004); https://doi.org/10.1117/12.564631

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available