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Analyse des Geokodierungsfehlers für die gemeinsame Bearbeitung von SAR und optischen Daten

Suttner, Magdalena (2016) Analyse des Geokodierungsfehlers für die gemeinsame Bearbeitung von SAR und optischen Daten. Bachelor's, Technical University of Munich.

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In this thesis the geocoding error for the combined use of SAR (Synthetic Aperture Radar) data and optical data is analysed. Images of islands in the coastal region near Stockholm are the basis for this evaluation. Radar images of the TerraSAR-X satellite are compared to optical images from bing and google. The coast lines are automatically detected from binary images via variable thresholding. Afterwards two procedures are executed to analyse the offset between the coastlines of two images: On the one hand it is assumed that only a simple affine transformation is needed. This is why the coast line is represented by an ellipse that is determined through fourier transformation and subsequently the ellipse transformation is calculated. On the other hand a more general approach is used and a vector field of the offset is computed. For this purpose the points of one coast line are matched to the points of the other coast line using cosine similarity in the feature space (features position, normal vector and curvature). Then the offset is calculated. The vectors are analysed by various graphical tools. As a result of this work a constant offset could be detected: A shift of the islands in the optical images compared to the islands in SAR-images to west/north west. The modelling of the offset as vector field turns out to be very prone to errors. The principle of ellipse approximation appears to be more helpful for a first approximation of the geocoding error.

Item URL in elib:https://elib.dlr.de/108660/
Document Type:Thesis (Bachelor's)
Title:Analyse des Geokodierungsfehlers für die gemeinsame Bearbeitung von SAR und optischen Daten
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Suttner, MagdalenaTechnical University of MunichUNSPECIFIED
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Number of Pages:42
Keywords:SAR, Geocoding
Institution:Technical University of Munich
Department:Department of Civil, Geo and Environmental Engineering
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 - Vorhaben hochauflösende Fernerkundungsverfahren (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > SAR Signal Processing
Deposited By: Baier, Gerald
Deposited On:09 Dec 2016 09:54
Last Modified:09 Dec 2016 09:54

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