Remote sensing of nearshore currents using coastal optical imagery SCOPUS KCI

DC Field Value Language Yoo, J. - Kim, S.-S. - 2020-04-20T03:55:15Z - 2020-04-20T03:55:15Z - 2020-01-28 - 2015 -
dc.identifier.issn 1598-141X -
dc.identifier.uri -
dc.description.abstract In-situ measurements are labor-intensive, time-consuming, and limited in their ability to observe currents with spatial variations in the surf zone. This paper proposes an optical image-based method of measurement of currents in the surf zone. This method measures nearshore currents by tracking in time wave breaking-induced foam patches from sequential images. Foam patches in images tend to be arrayed with irregular pixel intensity values, which are likely to remain consistent for a short period of time. This irregular intensity feature of a foam patch is characterized and represented as a keypoint using an imagebased object recognition method, i.e., Scale Invariant Feature Transform (SIFT). The keypoints identified by the SIFT method are traced from time sequential images to produce instantaneous velocity fields. In order to remove erroneous velocities, the instantaneous velocity fields are filtered by binding them within upper and lower limits, and averaging the velocity data in time and space with a certain interval. The measurements that are obtained by this method are comparable to the results estimated by an existing image-based method of observing currents, named the Optical Current Meter (OCM). © 2015, Korea Ocean Research and Development Institute. All rights reserved. -
dc.description.uri 1 -
dc.language Korean -
dc.publisher Korea Ocean Research and Development Institute -
dc.subject coastal current -
dc.subject nearshore dynamics -
dc.subject remote sensing -
dc.subject satellite imagery -
dc.subject spatial variation -
dc.subject surf zone -
dc.subject wave breaking -
dc.subject wave velocity -
dc.title Remote sensing of nearshore currents using coastal optical imagery -
dc.type Article -
dc.citation.endPage 22 -
dc.citation.startPage 11 -
dc.citation.title Ocean and Polar Research -
dc.citation.volume 37 -
dc.citation.number 1 -
dc.identifier.bibliographicCitation Ocean and Polar Research, v.37, no.1, pp.11 - 22 -
dc.identifier.doi 10.4217/OPR.2015.37.1.011 -
dc.identifier.scopusid 2-s2.0-84926323899 -
dc.type.docType Article -
dc.identifier.kciid ART001972976 -
dc.description.journalClass 1 -
dc.subject.keywordPlus coastal current -
dc.subject.keywordPlus nearshore dynamics -
dc.subject.keywordPlus remote sensing -
dc.subject.keywordPlus satellite imagery -
dc.subject.keywordPlus spatial variation -
dc.subject.keywordPlus surf zone -
dc.subject.keywordPlus wave breaking -
dc.subject.keywordPlus wave velocity -
dc.subject.keywordAuthor Digital optical imagery -
dc.subject.keywordAuthor Nearshore currents -
dc.subject.keywordAuthor Remote sensing -
dc.subject.keywordAuthor Surf zone -
dc.subject.keywordAuthor Wave-induced foam -
dc.description.journalRegisteredClass scopus -
dc.description.journalRegisteredClass kci -
Appears in Collections:
Marine Domain Management Research Division > Marine Disaster Research Center > 1. Journal Articles
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