Calving Events Detection and Quantification from Time-lapse Images : A Case Study of Tunabreen Glacier, Svalbard

A fully automated method for detecting and measuring calving regions of a glacier is an important tool to gather massive statistical data of calving events. A new framework to achieve the goals is presented in this thesis. First, time-lapse images are registered to the first image in the set. Regist...

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Bibliographic Details
Main Author: Adinugroho, Sigit
Format: Bachelor Thesis
Language:English
Published: Uppsala universitet, Institutionen för informationsteknologi 2015
Subjects:
Online Access:http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-257062
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spelling ftuppsalauniv:oai:DiVA.org:uu-257062 2023-05-15T16:22:13+02:00 Calving Events Detection and Quantification from Time-lapse Images : A Case Study of Tunabreen Glacier, Svalbard Adinugroho, Sigit 2015 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-257062 eng eng Uppsala universitet, Institutionen för informationsteknologi IT 15038 http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-257062 info:eu-repo/semantics/openAccess Student thesis info:eu-repo/semantics/bachelorThesis text 2015 ftuppsalauniv 2023-02-23T21:38:31Z A fully automated method for detecting and measuring calving regions of a glacier is an important tool to gather massive statistical data of calving events. A new framework to achieve the goals is presented in this thesis. First, time-lapse images are registered to the first image in the set. Registration process makes use of the M-Estimator Sample Consensus (MSAC) method to estimate a transformation model that relates a pair of Speeded-Up Robust Features (SURF). Then, the terminus of a glacier is separated from other objects by a semi-automatic Chan-vese level-set segmentation. After that, calving regions in a terminus are detected as a combined difference of Local Binary Patterns (LBP) of two successive images. Clustered points that form a difference image are transformed into polygons representing changed regions by applying the α-shape method. Finally, the areas of changed regions are estimated by the pixel scaling method. The results highlight the performance of the method under normal conditions and reveal the impact of various weather conditions to the performance of the method. Bachelor Thesis glacier Svalbard Uppsala University: Publications (DiVA) Svalbard Tunabreen ENVELOPE(17.387,17.387,78.461,78.461)
institution Open Polar
collection Uppsala University: Publications (DiVA)
op_collection_id ftuppsalauniv
language English
description A fully automated method for detecting and measuring calving regions of a glacier is an important tool to gather massive statistical data of calving events. A new framework to achieve the goals is presented in this thesis. First, time-lapse images are registered to the first image in the set. Registration process makes use of the M-Estimator Sample Consensus (MSAC) method to estimate a transformation model that relates a pair of Speeded-Up Robust Features (SURF). Then, the terminus of a glacier is separated from other objects by a semi-automatic Chan-vese level-set segmentation. After that, calving regions in a terminus are detected as a combined difference of Local Binary Patterns (LBP) of two successive images. Clustered points that form a difference image are transformed into polygons representing changed regions by applying the α-shape method. Finally, the areas of changed regions are estimated by the pixel scaling method. The results highlight the performance of the method under normal conditions and reveal the impact of various weather conditions to the performance of the method.
format Bachelor Thesis
author Adinugroho, Sigit
spellingShingle Adinugroho, Sigit
Calving Events Detection and Quantification from Time-lapse Images : A Case Study of Tunabreen Glacier, Svalbard
author_facet Adinugroho, Sigit
author_sort Adinugroho, Sigit
title Calving Events Detection and Quantification from Time-lapse Images : A Case Study of Tunabreen Glacier, Svalbard
title_short Calving Events Detection and Quantification from Time-lapse Images : A Case Study of Tunabreen Glacier, Svalbard
title_full Calving Events Detection and Quantification from Time-lapse Images : A Case Study of Tunabreen Glacier, Svalbard
title_fullStr Calving Events Detection and Quantification from Time-lapse Images : A Case Study of Tunabreen Glacier, Svalbard
title_full_unstemmed Calving Events Detection and Quantification from Time-lapse Images : A Case Study of Tunabreen Glacier, Svalbard
title_sort calving events detection and quantification from time-lapse images : a case study of tunabreen glacier, svalbard
publisher Uppsala universitet, Institutionen för informationsteknologi
publishDate 2015
url http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-257062
long_lat ENVELOPE(17.387,17.387,78.461,78.461)
geographic Svalbard
Tunabreen
geographic_facet Svalbard
Tunabreen
genre glacier
Svalbard
genre_facet glacier
Svalbard
op_relation IT
15038
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-257062
op_rights info:eu-repo/semantics/openAccess
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