dc.contributor.author | Heyn, Hans-Martin | |
dc.contributor.author | Knoche, Martin | |
dc.contributor.author | Zhang, Qin | |
dc.contributor.author | Skjetne, Roger | |
dc.date.accessioned | 2017-11-27T15:06:13Z | |
dc.date.available | 2017-11-27T15:06:13Z | |
dc.date.created | 2017-11-06T15:44:36Z | |
dc.date.issued | 2017 | |
dc.identifier.isbn | 978-0-7918-5776-2 | |
dc.identifier.uri | http://hdl.handle.net/11250/2468162 | |
dc.description.abstract | This paper presents a ship-mounted multi-lens camera system for sea-ice monitoring and algorithms to automatically evaluate the sea-ice concentration and to indicate the floe-sizes in a radius of 100 meter around the vessel. During the SWEDARCTIC Arctic Ocean 2016 expedition, 11 camera lenses recorded the sea-ice conditions around the Swedish icebreaker Oden. As an example of the possible use of this image system, the images of six lenses are combined into one 360° panoramic image. To distinguish between water and sea-ice in the images, and thus to evaluate the sea-ice concentration around the vessel, a direct thresholding, the k-means, and a novel adaptive thresholding method are applied. Moreover, an edge detector gives the number of pixels that either form the boundary between sea-ice and water or are part of a visible ice fracture. The ratio between these edge pixels and the total number of pixels containing sea-ice gives an indication of the floe size distribution (FSD) in the image. | nb_NO |
dc.language.iso | eng | nb_NO |
dc.publisher | American Society of Mechanical Engineers (ASME) | nb_NO |
dc.relation.ispartof | ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering Volume 8: Polar and Arctic Sciences and Technology; Petroleum Technology | |
dc.title | A system for automated vision-based sea-ice concentration detection and floe-size distribution indication from an icebreaker | nb_NO |
dc.type | Chapter | nb_NO |
dc.type | Peer reviewed | nb_NO |
dc.description.version | acceptedVersion | nb_NO |
dc.identifier.doi | 10.1115/OMAE2017-61822 | |
dc.identifier.cristin | 1511519 | |
dc.relation.project | Vetenskapsrådet: 203471 | nb_NO |
dc.relation.project | Vetenskapsrådet: 223254 | nb_NO |
dc.description.localcode | This article will not be available due to copyright restrictions (c) 2017 by ASME | nb_NO |
cristin.unitcode | 194,64,20,0 | |
cristin.unitname | Institutt for marin teknikk | |
cristin.ispublished | true | |
cristin.fulltext | postprint | |
cristin.qualitycode | 1 | |