Shelf Surface Motion Estimation from Repeat Satellite Imagery
In this paper, remote sensing data of Amery ice shelf was used to study Antarctica ice motion and flux problem by a hierarchical image matching method. It combines feature points and grid points to provide a dense, precise and reliable matching result. First, seed points are extracted at the top lev...
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ftjonlinejournal:oai:online-journals.org:article/3194 2023-05-15T13:22:03+02:00 Shelf Surface Motion Estimation from Repeat Satellite Imagery Liu, Yi Fei, Yan Wang, Weian 2013-10-22 application/pdf http://online-journals.org/index.php/i-joe/article/view/3194 eng eng International Association of Online Engineering (IAOE) http://online-journals.org/index.php/i-joe/article/view/3194/2851 http://online-journals.org/index.php/i-joe/article/view/3194 Copyright (c) 2017 Yi Liu, Yan Fei, Weian Wang International Journal of Online and Biomedical Engineering (iJOE); Vol. 9 (2013): Special Issue: MESA2013; pp. 43-50 2626-8493 Amery ice shelf(AIS) Global warming Lambert glacier ice flow info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2013 ftjonlinejournal 2023-04-10T05:32:58Z In this paper, remote sensing data of Amery ice shelf was used to study Antarctica ice motion and flux problem by a hierarchical image matching method. It combines feature points and grid points to provide a dense, precise and reliable matching result. First, seed points are extracted at the top level of image pyramid using the SIFT algorithm with RANSAC approach to remove mismatches and enhance robustness. These points are used to construct an initial triangulation. Then, feature point and grid point matching are conducted based on the triangle constraint. In the process of hierarchical image matching, the parallaxes from upper levels are transferred to levels beneath with triangle constraint. At last, outliers are detected and removed based on local smooth constraint of parallax. Also, bidirectional image matching method is adopted to verify the matching results and increase the number of matched points. Experiments with Landsat7 images show that the proposed method has the capacity to generate reliable and dense matching results for surface velocity estimation from stereo satellite imagery. Global warming will lead to Amery shelf and glaciers melt and flow rate increase, which can be confirmed by on-site GPS and remote sensing data. Through research the ice shelf flow velocity field, the bottom can calculate the ice flux of this area, and result confirm that the impact of climate for glacier and ice shelf. Article in Journal/Newspaper Amery Ice Shelf Antarc* Antarctica Ice Shelf Lambert Glacier Online-Journals.org (International Association of Online Engineering) Amery ENVELOPE(-94.063,-94.063,56.565,56.565) Amery Ice Shelf ENVELOPE(71.000,71.000,-69.750,-69.750) Lambert Glacier ENVELOPE(67.490,67.490,-73.065,-73.065) Pyramid ENVELOPE(157.300,157.300,-81.333,-81.333) |
institution |
Open Polar |
collection |
Online-Journals.org (International Association of Online Engineering) |
op_collection_id |
ftjonlinejournal |
language |
English |
topic |
Amery ice shelf(AIS) Global warming Lambert glacier ice flow |
spellingShingle |
Amery ice shelf(AIS) Global warming Lambert glacier ice flow Liu, Yi Fei, Yan Wang, Weian Shelf Surface Motion Estimation from Repeat Satellite Imagery |
topic_facet |
Amery ice shelf(AIS) Global warming Lambert glacier ice flow |
description |
In this paper, remote sensing data of Amery ice shelf was used to study Antarctica ice motion and flux problem by a hierarchical image matching method. It combines feature points and grid points to provide a dense, precise and reliable matching result. First, seed points are extracted at the top level of image pyramid using the SIFT algorithm with RANSAC approach to remove mismatches and enhance robustness. These points are used to construct an initial triangulation. Then, feature point and grid point matching are conducted based on the triangle constraint. In the process of hierarchical image matching, the parallaxes from upper levels are transferred to levels beneath with triangle constraint. At last, outliers are detected and removed based on local smooth constraint of parallax. Also, bidirectional image matching method is adopted to verify the matching results and increase the number of matched points. Experiments with Landsat7 images show that the proposed method has the capacity to generate reliable and dense matching results for surface velocity estimation from stereo satellite imagery. Global warming will lead to Amery shelf and glaciers melt and flow rate increase, which can be confirmed by on-site GPS and remote sensing data. Through research the ice shelf flow velocity field, the bottom can calculate the ice flux of this area, and result confirm that the impact of climate for glacier and ice shelf. |
format |
Article in Journal/Newspaper |
author |
Liu, Yi Fei, Yan Wang, Weian |
author_facet |
Liu, Yi Fei, Yan Wang, Weian |
author_sort |
Liu, Yi |
title |
Shelf Surface Motion Estimation from Repeat Satellite Imagery |
title_short |
Shelf Surface Motion Estimation from Repeat Satellite Imagery |
title_full |
Shelf Surface Motion Estimation from Repeat Satellite Imagery |
title_fullStr |
Shelf Surface Motion Estimation from Repeat Satellite Imagery |
title_full_unstemmed |
Shelf Surface Motion Estimation from Repeat Satellite Imagery |
title_sort |
shelf surface motion estimation from repeat satellite imagery |
publisher |
International Association of Online Engineering (IAOE) |
publishDate |
2013 |
url |
http://online-journals.org/index.php/i-joe/article/view/3194 |
long_lat |
ENVELOPE(-94.063,-94.063,56.565,56.565) ENVELOPE(71.000,71.000,-69.750,-69.750) ENVELOPE(67.490,67.490,-73.065,-73.065) ENVELOPE(157.300,157.300,-81.333,-81.333) |
geographic |
Amery Amery Ice Shelf Lambert Glacier Pyramid |
geographic_facet |
Amery Amery Ice Shelf Lambert Glacier Pyramid |
genre |
Amery Ice Shelf Antarc* Antarctica Ice Shelf Lambert Glacier |
genre_facet |
Amery Ice Shelf Antarc* Antarctica Ice Shelf Lambert Glacier |
op_source |
International Journal of Online and Biomedical Engineering (iJOE); Vol. 9 (2013): Special Issue: MESA2013; pp. 43-50 2626-8493 |
op_relation |
http://online-journals.org/index.php/i-joe/article/view/3194/2851 http://online-journals.org/index.php/i-joe/article/view/3194 |
op_rights |
Copyright (c) 2017 Yi Liu, Yan Fei, Weian Wang |
_version_ |
1766363016526299136 |