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A Framework for Satellite Image Classification in the Context of Crisis Mapping Using Markov Random Fields

Kersten, Jens and Gähler, Monika (2010) A Framework for Satellite Image Classification in the Context of Crisis Mapping Using Markov Random Fields. In: Proceedings of RSPSoc 2010 Annual Conference. RSPSoc 2010, Cork, Irland.

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Abstract

In this contribution a framework for classification of high resolution optical satellite images in the context of crisis mapping is proposed and evaluated. Multiscale image information (data model) as well as hierarchical and spatial context information (prior model) is incorporated into the classification process using a hybrid Markov model which combines a hierarchical directed as well as a planar lattice-based Markov Random Field (MRF). The modelling of arbitrary semantic classes in different scales enables the definition of a hierarchical semantic network representing the dependencies and relations between the classes in adjacent scales. Classification is carried out using non-iterative hierarchical maximum a-posteriori (MAP) or mode of posterior marginal (MPM) inference as well as a subsequent optimization step using a planar MRF. Additionally, a modified MAP estimation which is able to outperform the original estimators under certain conditions is proposed. The impact of incorporation of image data from multiple scales is evaluated in this contribution. Furthermore, the dependency between the quantity of the training data and the classification accuracy is analyzed.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:A Framework for Satellite Image Classification in the Context of Crisis Mapping Using Markov Random Fields
Authors:
AuthorsInstitution or Email of Authors
Kersten, Jensjens.kersten@dlr.de
Gähler, Monikamonika.gaehler@dlr.de
Date:August 2010
Journal or Publication Title:Proceedings of RSPSoc 2010 Annual Conference
Refereed publication:No
In SCOPUS:No
In ISI Web of Science:No
Number of Pages:8
Editors:
EditorsEmail
Cawkwell, Fionaf.cawkwell@ucc.ie
Status:Accepted
Keywords:Classification, Crisis Mapping, Markov Random Fields
Event Title:RSPSoc 2010
Event Location:Cork, Irland
Event Type:international Conference
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben hochauflösende Fernerkundungsverfahreen (old)
Location: Oberpfaffenhofen
Institutes and Institutions:German Remote Sensing Data Center > Civil Crisis Information and Geo Risks
Deposited By: Jens Kersten
Deposited On:10 Feb 2011 10:24
Last Modified:10 Feb 2011 10:24

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