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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. RSPSoc 2010, 31. Aug. - 03. Sept. 2010, Cork, Irland.

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Abstract

In this contribution a general framework for classification of very high resolution optical satellite images is proposed and evaluated. This approach is designed in order to cope with the specific conditions accompanied by crisis mapping applications and is moreover well suited for several other applications. 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 inference which is able to outperform the original inference methods 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.

Item URL in elib:https://elib.dlr.de/66374/
Document Type:Conference or Workshop Item (Speech)
Title:A Framework for Satellite Image Classification in the Context of Crisis Mapping using Markov Random Fields
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Kersten, Jensjens.kersten (at) dlr.dehttps://orcid.org/0000-0002-4735-7360
Gähler, MonikaMonika.Gaehler (at) dlr.dehttps://orcid.org/0000-0001-7421-3488
Date:September 2010
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 1-8
Status:Published
Keywords:Satellite imagery, classification, crisis mapping
Event Title:RSPSoc 2010
Event Location:Cork, Irland
Event Type:international Conference
Event Dates:31. Aug. - 03. Sept. 2010
Organizer:University College Cork und National Maritime College of Ireland
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Security-relevant Earth Observation
Location: Oberpfaffenhofen
Institutes and Institutions:German Remote Sensing Data Center > Geo Risks and Civil Security
Deposited By: Kersten, Dr.-Ing. Jens
Deposited On:09 Nov 2020 15:46
Last Modified:09 Nov 2020 15:46

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