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  • 1
    Call number: S 99.0139(332)
    In: Wissenschaftliche Arbeiten der Fachrichtung Geodäsie und Geoinformatik der Leibniz Universität Hannover, Nr. 332
    Type of Medium: Series available for loan
    Pages: x, 199 Seiten , Illustrationen, Diagramme
    ISSN: 0174-1454
    Series Statement: Wissenschaftliche Arbeiten der Fachrichtung Geodäsie und Geoinformatik der Leibniz Universität Hannover Nr. 332
    Language: German
    Note: Dissertation, Gottfried Wilhelm Leibniz Universität Hannover, 2017 , Inhaltsverzeichnis Inhaltsverzeichnis 1 Einleitung 1.1 Motivation 1.2 Stand der Forschung 1.3 Zielsetzung und Aufbau der Arbeit 2 Grundlagen 2.1 Grundlagen der physikalischen Geodäsie 2.1.1 Das Schwerefeld der Erde 2.1.2 Gravitationspotential - Kugelfunktionsentwicklung und Fehler 2.1.3 Ableitungen des Gravitationspotentials 2.1.4 Satellitengradiometrie 2.1.5 Zeiten 2.2 Ausgewählte Grundlagen der Statistik und digitalen SignalVerarbeitung 2.2.1 Deskriptive Statistik 2.2.2 Aspekte der digitalen Signalverarbeitung 2.2.3 Filterung 2.2.4 Spektralschätzung 2.3 Drehmatrizen, Eulerwinkel und Quaternionen 2.4 Methodische Grundlagen der Kreuzungspunktanalyse 2.4.1 Bestimmung von Kreuzungspunkten 2.4.2 Kreuzungspunktposition und Interpolationen 3 Die GOCE-Mission 3.1 Wahl des GOCE-Orbits 3.2 Gradiometer und Gravitationsgradienten 3.2.1 Gradiometeraufbau und Beschleunigungsmesser 3.2.2 Gravitationsgradienten aus Beschleunigungsdifferenzen 3.2.3 Einschränkungen und Fehler des Gradiometers 3.3 Weiteres Instrumentarium im GOCE-Satelliten 3.4 Koordinatensysteme und Transformationen 3.4.1 GOCE-relevante Koordinatensysteme 3.4.2 Transformationen zwischen Koordinatensystemen 3.5 Datenprodukte und deren Genauigkeiten 4 Genauigkeitsanforderungen an Datenprodukte und Rechenoperationen 4.1 Analyse der GOCE-Gravitationsgradienten 4.1.1 Gradienten und Fehler in Zeit- und Frequenzbereich 4.1.2 Vergleich der Gradienten mit globalen Gravitationsfeldmodellen 4.2 Abschätzung der Genauigkeit der Gravitationsgradienten 4.3 Bestimmung der Genauigkeitsanforderungen 5 Methodik zur Gradienten-Validierung in Kreuzungspunkten 5.1 Übersicht zum Ablauf der Validierung 5.2 Kreuzungspunktbestimmung 5.2.1 Ziele und Methodik 5.2.2 Beschreibung des Algorithmus und Implementierung 5.3 Interpolation der Beobachtungsgrößen 5.3.1 Interpolation der reduziert-dynamischen Positionen 5.3.2 Interpolation der finalen Kreuzungspunktpositionen 5.3.3 Interpolation weiterer Datenprodukte im Kreuzungspunkt 5.4 Vergleichskoordinatensystem 5.5 Transformation des Tensors der GOCE-Gravitationsgradienten 5.5.1 Rotation des GOCE-GGT (Einfügen modellbasierter Vij, Filterung) 5.5.2 Translation des Tensors der GOCE-Gravitationsgradienten 5.5.3 Transformation und Diskussion 5.6 Closed-Loop-Test 6 Analyse der Kreuzungspunktdifferenzen 6.1 Einleitung 6.2 Qualität des Gesamtdatensatzes 6.2.1 Statistische Parameter 6.2.2 Korrelationen und Abhängigkeiten 6.3 Regionale Untersuchungen 6.4 Lokale Artefakte mit zeitlich begrenztem Einfluss auf die Gradienten 6.5 Zusammenfassung und Diskussion 7 Gradiometerkonzepte zukünftiger Schwerefeld-Satellitenmissionen 7.1 Missionsplanung und bisherige Studien 7.2 Gradiometriekonzepte und Technologien 7.2.1 Feste Testmassen und deren Lagebestimmung sowie Lageregelung 7.2.2 Atominterferometrie auf Basis kalter Atome 7.3 Kombinierte Beobachtungskonzepte und Bestimmung dritter Ableitungen 7.4 Zusammenfassung 8 Zusammenfassung und Ausblick Abkürzungsverzeichnis Literaturverzeichnis
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  • 2
    Call number: S 99.0139(353)
    In: Arbeiten der Fachrichtung Geodäsie und Geoinformatik der Leibniz Universität Hannover, Nr. 353
    Type of Medium: Series available for loan
    Pages: xii, 116 Seiten , Illustrationen, Diagramme
    ISBN: 978-3-7696-5251-2 , 9783769652512
    ISSN: 0065-5325
    Series Statement: Wissenschaftliche Arbeiten der Fachrichtung Geodäsie und Geoinformatik der Universität Hannover Nr. 353
    Language: English
    Note: Dissertation, Gottfried Wilhelm Leibniz Universität Hannover, 2019 , Contents Declaration Abstract Zusammenfassung List of Figures List of Tables Abbreviation 1 Introduction 1.1 Motivation of the study 1.2 Proposal and content 2 On the application of TLS in deformation monitoring 2.1 Fundamentals of TLS 2.1.1 Range measurement system 2.1.2 Beam deflection system 2.2 Error sources for TLS measurements 2.2.1 Influence factors for the errors 2.2.2 State of the art in TLS calibration 2.3 Deformation monitoring with TLS measurements 2.3.1 Design of measurement scheme 2.3.2 Data collection 2.3.3 Data pre-processing 2.3.4 General methodology in TLS-based deformation monitoring 3 The influence of a simplified stochastic model on a congruence based deformation analysis 3.1 Modelling the deformation 3.1.1 Conventional deformation model (Descriptive model) 3.1.2 Advanced deformation model (Causal model) 3.2 Hypothesis test for congruency 3.3 Influence of simplified VCMs on the congruency test 4 On the stochasticity of TLS measurement 4.1 State of the art for the stochastic models of TLS measurements 4.2 Challenge of specifying variance-covariance values 4.3 Statistical evaluation of stochastic model 5 Approximating the 3D point clouds with B-spline models for deformation monitoring 5.1 State of the art on the approximation of 3D point clouds 5.2 B-spline approximation in a linear Gauss-Markov model 5.3 Model selection methodology based on hypothesis testing 5.4 Comparison between B-splines and polynomial approximation 6 Conclusion and Outlook Contributions of Authors Paper 1 Paper 2 Paper 3 Paper 4 Bibliography Curriculum Vitae Acknowledgement , Zusammenfassung in Englisch und Deutsch
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  • 3
    Call number: S 99.0139(354)
    In: Wissenschaftliche Arbeiten der Fachrichtung Geodäsie und Geoinformatik der Leibniz Universität Hannover, Nr. 354
    Type of Medium: Series available for loan
    Pages: 155 Seiten , Illustrationen, Diagramme, Karten
    ISBN: 978-3-7696-5252-9 , 9783769652529
    ISSN: 0065-5325
    Series Statement: Wissenschaftliche Arbeiten der Fachrichtung Geodäsie und Geoinformatik der Leibniz Universität Hannover Nr. 354
    Language: English
    Note: Dissertation, Gottfried Wilhelm Leibniz Universität Hannover, 2019 , 1. Introduction 1.1. Research Objectives 1.2. Outline and Structure of the Thesis 2. Theoretical Background 2.1. Introduction 2.2. SAR Imaging 2.2.1. SAR Image Distortions 2.2.2. SAR Imaging Modes 2.2.3. SAR Missions 2.3. SAR Interferometry 2.3.1. InSAR Workflow 2.3.2. InSAR Decorrelation 2.3.3. Errors in InSAR 2.3.4. Examples of Interferograms 2.3.5. Decomposition of Line-of-Sight Measurements 2.4. Multi Temporal InSAR 2.4.1. Scattering Mechanisms in SAR Images 2.4.2. Interferogram Stacking 2.4.3. Persistent Scatterer InSAR 2.4.4. Small Baseline InSAR 2.5. Analysis of Displacement Time Series 2.5.1. Continuous Wavelet Transform 2.5.2. Cross Wavelet Transform 2.5.3. Application of CWT and XWT to InSAR Time Series 3. Methodological Contribution 37 3.1. Introduction 3.2. Challenges in Large-scale InSAR 3.3. Proposed Method 3.3.1. Interferogram Formation 3.3.2. Adaptive Correction of Interferograms 3.3.3. Estimating the Displacement Rate 3.3.4. Estimating the Time Series of Displacement 4. InSAR Monitoring of Localized Landslide in Taihape, New Zealand 4.1. Abstract 4.2. Introduction 4.3. Study Area 4.4. Methods 4.4.1. InSAR Measurement 4.4.2. Ancillary Data 4.4.3. Cause-Effect Analysis 4.5. Results 4.5.1. Small-baseline Interferograms 4.5.2. Time-series Results 4.6. Discussion 4.6.1. Suitability of InSAR Measurements for Monitoring the Taihape Landslide 4.6.2. Interpretation of InSAR Results 4.6.3. Comparison with Ground Truth 4.6.4. Comparison with Rainfall and Groundwater Level 4.7. Conclusion 4.8. Acknowledgments 4.9. Supplementary Materials 5. InSAR Measurement of Regional Land Subsidence in Tehran, Iran 5.1. Abstract 5.2. Introduction 5.3. Study Area and Problem Description 5.4. Datasets 5.4.1. SAR Data 5.4.2. Leveling 5.4.3. Groundwater Level 5.5. Methods 5.5.1. Multi-temporal InSAR Analysis 5.5.2. Merging InSAR Time Series 5.5.3. Cause-Effect Analysis 5.6. Results 5.6.1. Southwest of Tehran 5.6.2. IKA Airport 5.6.3. Varamin County 5.6.4. Time Series of Displacement 5.6.5. Accuracy, Precision and Consistency Assessments 5.7. Discussion 5.7.1. Structural Control of the Displacement 5.7.2. Comparison with Groundwater 5.7.3. Elastic vs. Inelastic Compaction 5.8. Conclusion 5.9. Acknowledgments 5.10. Supplementary materials 5.10.1. Significance of Tropospheric Delay 5.10.2. Decomposition of LOS Measurement 5.10.3. Under/Overestimation of Displacement Rates 6. Sentinel-1 InSAR Measurement of Anthropogenic Deformation in Germany 6.1. Summary 6.2. Introduction 6.3. Sentinel-1 InSAR Processing 6.4. Large-scale Sentinel-1 Processing 6.5. Anthropogenic Ground Motion in Berlin 6.6. Mining-induced Deformation in Leipzig 6.7. Conclusions and Prospect 6.8. Acknowledgements 7. Subsequent Work: Measurement of Localized Deformations over Extensive Areas 7.1. Introduction 7.2. SAR Datasets 7.3. Sentinel-1 Interferograms 7.4. Corrected Interferograms 7.5. Displacement Maps and Time Series 7.6. Discussion 7.7. Conclusion 8. Cooperation Works 8.1. Quantifying Land Subsidence in the Rafsanjan Plain, Iran Using InSAR Measurements 8.1.1. Abstract 8.1.2. Author Contribution 8.2. Characterizing Post-construction Settlement of Masjed-Soleyman Dam Using TerraSAR-X SpotLight InSAR 8.2.1. Abstract 8.2.2. Author Contribution 8.3. InSAR Observation of the 18 August 2014 Mormori (Iran) Earthquake 8.3.1. Author Contribution 9. Summary and Future Work 9.1. Future works , Zusammenfassung in Englisch und Deutsch Seite 3-6
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  • 4
    Call number: S 99.0139(342)
    In: Wissenschaftliche Arbeiten der Fachrichtung Vermessungswesen der Universität Hannover, Nr. 342
    Type of Medium: Series available for loan
    Pages: 137 Seiten , Illustrationen, Diagramme
    ISSN: 0174-1454
    Series Statement: Wissenschaftliche Arbeiten der Fachrichtung Vermessungswesen der Universität Hannover Nr. 342
    Language: English
    Note: Dissertation, Gottfried Wilhelm Leibniz Universität Hannover, 2018 , 1 Introduction 1.1 Background and motivation 1.2 Goals of this thesis 1.3 Outline 2 Background on digital maps and data mining 2.1 Digital maps 2.1.1 Navigation maps and map dynamics 2.1.2 OpenStreetMap 2.1.3 Navigation Data Standard (NDS) 2.2 Data mining 2.2.1 Knowledge Discovery in Databases (KDD) process 2.2.2 Taxonomy of data mining methods 2.2.3 Classification 2.2.4 Clustering 2.2.5 Time series analysis 3 Related work about mobile crowdsensing of on-street parking spaces 3.1 On-street parking 3.1.1 Parking occupancy detection 3.1.2 Parking availability estimation and prediction 3.1.3 Parking search and guidance 3.2 Mobile crowdsensing 3.2.1 Mobile crowdsensing in transportation 3.2.2 Mobile crowdsensing for parking 3.3 Research gaps addressed in this thesis 4 LiDAR-based parking availability data acquisition 4.1 Data recording 4.1.1 Sensor equipment 4.1.2 Measurement campaign 4.2 Methodology 4.2.1 Preprocessing 4.2.2 Segmentation 4.2.3 Classification 4.2.4 Repetition of segmentation and classification 4.2.5 Matching to road network 4.3 Results 4.3.1 Object segmentation 4.3.2 Classification 4.3.3 End-to-end evaluation of complete approach 4.3.4 Parking occupancy statistics over the day 4.4 Concluding remarks 5 Learning parking legality maps from parking observations 5.1 Methodology 5.1.1 Location of parked vehicles as method input 5.1.2 Data preprocessing 5.1.3 Definition of feature sets 5.1.4 Learning the parking legality of road subsegments 5.2 Evaluation 5.2.1 Evaluation approach 5.2.2 Results 5.3 Concluding remarks 6 Spatio-temporal analysis of large scale parking availability data and simulation of crowdsensing 6.1 Description and processing of parking dataset from SFpark 6.2 Time series analysis of parking availability data 6.3 Clustering of parking occupancy daily pattern 6.4 Spatial relations in parking availability 6.5 Modelling of crowdsensing based on downsampling for probe vehicles and mobile apps 6.5.1 Scenario based on probe vehicles 6.5.2 Scenario based on mobile apps 6.6 Modelling of probe-vehicle-based crowdsensing from taxi GPS trajectories 6.6.1 Processing overview and description of taxi trajectory dataset 6.6.2 Taxi GPS trajectory processing 6.6.3 Characteristics and aggregation of taxi coverage 6.6.4 Comparison of parking and taxi daily pattern 6.6.5 Simulation of parking availability observations 6.7 Concluding remarks 7 Parking availability estimation and prediction from crowdsensed data 7.1 Spatial interpolation of parking availability 7.2 Parking availability estimation with persistence method 7.3 Estimation and prediction of parking availability based on binary classification 7.3.1 Binary classification approach 7.3.2 Results of binary classification estimation and prediction 7.4 Concluding remarks 8 Benefits of crowdsensed parking availability information 8.1 Types of information for on-street parking 8.2 Experimental setup 8.2.1 Routing strategies 8.2.2 Data sources 8.3 Evaluation of the impact of different parking information 8.3.1 Results for all decisions in the dataset 8.3.2 Results for relevant decisions 8.3.3 Similarity of capacity 8.4 Concluding remarks 9 Conclusion and outlook 9.1 Research questions addressed and overall conclusion 9.2 Applicability of dynamic map approaches to further dynamic phenomena 9.3 Future research directions List of figures List of tables References Acknowledgements Curriculum vitae
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  • 5
    Call number: S 99.0139(345)
    In: Wissenschaftliche Arbeiten der Fachrichtung Vermessungswesen der Universität Hannover
    Type of Medium: Series available for loan
    Pages: xiii, 107 Seiten , Illustrationen, Diagramme
    ISSN: 0174-1454
    Series Statement: Wissenschaftliche Arbeiten der Fachrichtung Vermessungswesen der Universität Hannover Nr. 345
    Language: English
    Note: Dissertation, Gottfried Wilhelm Leibniz Universität Hannover, 2018 , Introduction 1.1 Motivation and Objectives 1.2 Structure of the work 1.3 Own contributions for solving of the central issues 2 Modelling of measurement uncertainties 2.1 Motivation and overview 2.2 Characteristics of random and systematic uncertainties 2.3 Modelling methods for the uncertainty of measurements 2.3.1 An overview on uncertainty modelling 2.3.2 Probability theory and Bayes' theorem 3 Utility theory 3.1 Fundamentals 3.1.1 Ordinal utility 3.1.2 Cardinal utility 3.1.3 Multi-attribute utility 3.2 Expected Utility 3.2.1 Introduction 3.2.2 Von Neumann-Morgenstern utility theorem 4 Decision making procedures under uncertainty 4.1 Motivation and overview 4.2 Hypothesis testing with measurement uncertainties 4.2.1 Fundamentals 4.2.2 Statistical hypothesis testing 4.3 Decision making under pure uncertainty 4.4 Decision making under risk 4.5 Determination of significance level 4.6 Comparisons of two decision making methods 5 Transferring the methodology to applications 5.1 Motivation 5.2 Applications of two alternatives 5.2.1 Application of Case I 5.2.2 Application of Case II 5.3 Applications extended to u alternatives 5.4 Discussion of results and conclusions 6 Steering of measurement processes 6.1 Motivation 6.2 General process of measurement steering 6.3 Example of a steering application 7 Summary and outlook 7.1 Summary 7.2 Outlook Bibliography Acknowledgement Curriculum Vitae
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  • 6
    Call number: S 99.0139(349)
    In: Wissenschaftliche Arbeiten der Fachrichtung Vermessungswesen der Universität Hannover
    Type of Medium: Series available for loan
    Pages: 115 Seiten , Illustrationen, Diagramme
    ISSN: 0174-1454
    Series Statement: Wissenschaftliche Arbeiten der Fachrichtung Vermessungswesen der Universität Hannover Nr. 349
    Language: German
    Note: Dissertation, Gottfried Wilhelm Leibniz Universität Hannover, 2018 , 1. EINLEITUNG 1.1. Motivation 1.2. Zielsetzung 1.3. Wissenschaftlicher Beitrag 1.4. Gliederung der Arbeit 2. STAND DER WISSENSCHAFT 2.1. Klassifikation von Einzelbildern 2.2. Multitemporale Klassifikation 2.2.1. Steigerung der Klassifikationsgenauigkeit 2.2.2. Detektion von Veränderungen 2.3. Klassifikation von Bilddaten mit Zufallsfeldern 2.4. Zufallsfelder in der Fernerkundung 2.5. Diskussion 3. GRUNDLAGEN 3.1. Merkmale 3.1.1. Merkmalsextraktion 3.1.2. Merkmalsselektion 3.2. Graphische Modelle für die Bildanalyse 3.2.1. Grundlagen der Wahrscheinlichkeitstheorie 3.2.2. Graphische Modelle zur Modellierung von Wahrscheinlichkeiten 3.2.3. Markov Random Fields 3.2.4. Conditional Random Fields 3.2.5. Inferenz 3.3. Bewertungskriterien 4. CRF ZUR KLASSIFIKATION MULTITEMPORALER BILDDATEN UNTERSCHIEDLICHER AUFLÖSUNG 4.1. Multitemporale Klassifikation von Bildern identischer Auflösung 4.2. Multitemporale Klassifikation von Bildern unterschiedlicher Auflösung 4.3. Assoziationspotential 4.4. Räumliches Interaktionspotential 4.5. Zeitliches Interaktionspotential 5. EXPERIMENTELLE UNTERSUCHUNGEN 5.1. Strategie 5.2. Daten und Klassen 5.3. Merkmalsextraktion 5.4. Merkmalsselektion 5.5. Maximale Merkmalsskala für das Assoziationspotential 5.6. Parameter des räumlichen Interaktionspotentials 5.7. Evaluation der Klassifikationsgenauigkeit feiner Strukturen 5.8. Multitemporale Klassifikation von Fernerkundungsdaten mit einheitlicher Auflösung 5.9. Multitemporale Klassifikation von Daten unterschiedlicher Auflösung ohne Veränderungen der Landbedeckung 5.10. Multitemporale Klassifikation von Daten unterschiedlicher Auflösung mit Veränderungen der Landbedeckung 6. SCHLUSSBETRACHTUNG UND AUSBLICK 7. LITERATUR
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  • 7
    Call number: S 99.0139(348)
    In: Wissenschaftliche Arbeiten der Fachrichtung Vermessungswesen der Universität Hannover
    Type of Medium: Series available for loan
    Pages: 145 Seiten , Illustrationen, Diagramme, Karten
    ISSN: 0174-1454
    Series Statement: Wissenschaftliche Arbeiten der Fachrichtung Vermessungswesen der Universität Hannover Nr. 348
    Language: English
    Note: Dissertation, Gottfried Wilhelm Leibniz Universität Hannover, 2018 , Introduction 1.1 Synthetic Aperture Radar from Spaceborne Remote Sensing 1.2 Satellite-Based Monitoring of the Terrestrial Water Cycle 1.3 Remote Sensing of Water Storage in Central Asia 1.4 GFZ Activities in Central Asia and Study Areas in Kyrgyzstan 1.5 Research Objectives 1.6 Outline and Structure of the Thesis 2 Fundamentals of Synthetic Aperture Radar Remote Sensing 2.1 SAR Satellite Data 2.2 SAR Satellite Missions 2.3 Interferometric SAR 2.4 DInSAR Time Series with PSI 2.5 DInSAR Time Series with SBAS 2.6 Feature Tracking 3 State of the Art 3.1 Inter- and Intra-Annual Glacier Surface Velocities from SAR Data 3.2 Inter- and Intra-Annual Glacier Elevation Changes from SAR Data 3.3 Inter- and Intra-Annual Loading-Induced Crustal Deformations at Water Reservoirs from SAR Data 4 Quantification of Inylchek Glacier Surface Kinematics 4.1 Abstract 4.2 Introduction 4.3 Inylchek Glacier 4.4 Data and Methodology 4.4.1 TerraSAR-X Data Set 4.4.2 Feature Tracking 4.4.3 Decomposition to 3D Velocities 4.5 Results 4.6 Discussion 4.6.1 Error Estimation 4.6.2 Inter-Annual Kinematics of the Upper Southern Inylchek Glacier Branch .... 4.6.3 Lake Level Extent and GLOF 4.7 Conclusions 4.8 Acknowledgements 4.9 Author Contribution 5 Quantification of Inylchek Glacier Elevation Changes 5.1 Abstract 5.2 Introduction 5.3 Data 5.3.1 TanDEM X Data 5.3.2 External DEMs 5.3.3 Glacier Outlines of Inylchek 5.4 Methodology 5.4.1 Interferometric Processing of TanDEM-X Data 5.4.2 Alignment of the SRTM and TDX DEMs 5.4.3 Radar Penetration Correction 5.4.4 DEM Elevation Difference Calculation 5.4.5 Accuracy Assessment 5.5 Results and Discussion 5.5.1 Uncertainty of Measurements 5.5.2 DEM Alignment Quality 5.5.3 Inylchek Elevation Changes 5.6 Conclusions 5.7 Acknowledgements 5.8 Author Contribution 6 Quantification of Toktogul Water-Level-Induced Ground Deformations 6.1 Abstract 6.2 Introduction 6.3 Materials and Methods 6.3.1 Lake Altimetry 6.3.2 DInSAR processing of Envisat ASAR and Sentinel-1 Data 6.3.3 Atmospheric Correction 6.3.4 Deformation Decomposition of SentineH Data 6.3.5 Modelling of Elastic Surface Deformations 6.4 Results 6.4.1 Atmospheric Corrections 6.4.2 Ground Deformation 6.5 Discussion 6.5.1 Atmospheric Corrections 6.5.2 Ground Deformation 6.6 Conclusions 6.7 Acknowledgments 6.8 Author Contribution 7 Subsequent Work 7.1 Scope of the Chapter 7.2 GNSS-derived Inylchek Glacier Surface Kinematics 7.2.1 Abstract 7.2.2 Author Contribution 7.3 Monitoring of Lake Merzbacher's GLOF Event 7.3.1 Abstract 7.3.2 Author Contribution 7.4 Ongoing Work at GFZ Based on the Results of this Thesis 8 Summary and Outlook 8.1 Summary of Main Results 8.1.1 Methodological Aspects 8.1.2 Monitoring of Short-Time Changes 8.2 Outlook Bibliography
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  • 8
    Call number: S 99.0139(356)
    In: Wissenschaftliche Arbeiten der Fachrichtung Vermessungswesen der Universität Hannover
    Type of Medium: Series available for loan
    Pages: x, 111 Seiten , Illustrationen, Diagramme
    ISSN: 0174-1454
    Series Statement: Wissenschaftliche Arbeiten der Fachrichtung Vermessungswesen der Universität Hannover Nr. 356
    Language: English
    Note: Dissertation, Gottfried Wilhelm Leibniz Universität Hannover, 2020 , Abstract Zusammenfassung Acknowledgments Definition, Acronyms and Symbols 1 Introduction 1.1 Motivation 1.2 Person Re-Identification 1.3 Problem statement and research objective 1.4 Contribution 1.5 Outline of this thesis 2 Related work 2.1 Scope 2.2 Historical overview 2.3 Terminology and strategies 2.4 Handcrafted feature extraction methods 2.5 Data-driven feature extraction methods 2.6 Person view specific methods 2.7 Re-Ranking based methods 2.8 Domain adaptation methods 2.9 Discussion 3 Fundamentals 3.1 Fisheye camera geometry and projection model 3.2 Feature extraction 3.2.1 GOG/XQDA - a handcrafted feature extraction method 3.2.2 TriNet and SRNN - two data-driven feature extraction methods .... 4 A new approach for person re-identification 4.1 General overview 4.2 Input and assumptions 4.3 Projection alignment 4.4 View classification and sampling 4.5 Per-view matching 4.6 Fusion 4.7 Discussion of the approach 5 Experimental evaluation 5.1 General structure of this chapter 5.2 Multi-view investigations 5.2.1 Datasets 5.2.2 Training and inference procedure 5.2.3 Evaluation and discussion 5.3 Bird's eye view investigations 5.3.1 Datasets 5.3.2 Training and inference procedure 5.3.3 Evaluation and discussion 5.4 Influence of data 5.4.1 Datasets 5.4.2 Training and inference procedure 5.4.3 Evaluation and discussion 5.5 Fisheye investigations 5.5.1 Datasets 5.5.2 Training procedure 5.5.3 Projection alignment 5.5.4 Person view classification 5.5.5 Assessment of PRID results 5.5.6 Comparison with a contemporary approach 5.5.7 Qualitative comparison 6 Conclusions and future work A Datasets A.l Our novel datasets A.2 Public datasets References , Sprache der Zusammenfassungen: Englisch, Deutsch
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  • 9
    Call number: S 99.0139(363)
    In: Wissenschaftliche Arbeiten der Fachrichtung Geodäsie und Geoinformatik der Leibniz Universität Hannover, Nr. 363
    Type of Medium: Series available for loan
    Pages: 165 Seiten , Diagramme, Karten
    ISBN: 9783769652673
    Series Statement: Wissenschaftliche Arbeiten der Fachrichtung Geodäsie und Geoinformatik der Universität Hannover Nr. 363
    Language: English
    Note: 1 Introduction 1.1 Motivation and Research Questions 1.2 Objective Definition and Contributions 1.3 Outline of the Thesis 2 Theory and Related Work in Geodetic Network Analysis 2.1 Parameter Estimation in a Gauß - Markov Model 2.2 Parameter Estimation in a Gauß - Helmert Model 2.3 Geodetic Network Optimization: Theoretical Background and Related Work 2.3.1 Network Quality Criteria 2.3.2 Objective Functions and Optimality Criteria 2.3.3 Types of Optimization Problems 2.4 Discussion 3 Theoretical Background in Positioning and Navigation 3.1 Global Navigation Satellite Systems 3.1.1 GNSS Observables 3.1.2 GNSS positioning techniques 3.2 Inertial Navigation Systems 3.2.1 Coordinate Frames 3.2.2 Mechanization in the Navigation Frame 3.2.3 INS/GNSS Integration 3.3 Filtering Techniques 3.3.1 Bayes Filter 3.3.2 Kalman Filter 3.3.3 Linearized Kalman Filter 3.3.4 Extended Kalman Filter 3.4 Multi-Sensor Fusion 3.4.1 Laser Scanner 3.4.2 Stereo Cameras 3.4.3 Localization Versus Simultaneous Location and Mapping 4 State of the art in Collaborative Positioning 4.1 Introduction 4.2 Communication Architectures 4.3 Collaborative Positioning 4.3.1 GNSS Collaborative Positioning Approaches 4.3.2 Inertial Measurement Collaborative Positioning 4.3.3 Collaborative Positioning with Laser Scanner 4.3.4 Collaborative Positioning with Vision-Based Sensors 4.3.5 Collaborative Positioning Using Other Sensors 4.4 Simulation Technologies 4.4.1 Simulation Environments: Overview 4.4.2 Monte Carlo Methods 4.5 Discussion 5 Simulation Framework for Collaborative Scenarios 5.1 Design and Implementation 5.1.1 Vehicle Trajectories Simulator 5.1.2 Environmental Model 5.1.3 Measurement Generation 5.1.4 Collaborative-Extended Kalman Filter 5.1.5 Collaborative SLAM 5.1.6 Localization with Landmark Uncertainty 5.2 Application Example 5.2.1 Scenario and Setup 5.2.2 Sample Run 5.3 Discussion 6 Sensitivity Analysis of Dynamic Sensor Networks 6.1 Geodetic Network Optimization Problems for Dynamic Networks 6.2 Best Sensor Combination 6.2.1 Scenario and Sensor Setup 6.2.2 Sensitivity Results 6.3 Vehicle Dynamics Evaluation 6.3.1 Simulation Scenario and Setup 6.3.2 Process Noise Assessment 6.3.3 Process Noise to Measurement Noise Selection 6.4 Summary and Conclusions 7 Collaboration Versus Single Vehicle Estimation 7.1 Collaborative Navigation: Concept 7.2 Experiment Scenario and Setup 7.3 Collaboration Results 7.3.1 Accuracy and Precision Analysis 7.3.2 Integrity Analysis 7.4 Summary and Discussion 8 Conclusions 8.1 Summary 8.2 Outlook , Zusammenfassung in Englisch und Deutsch Seite i-iii
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  • 10
    Call number: S 99.0139(361)
    In: Wissenschaftliche Arbeiten der Fachrichtung Geodäsie und Geoinformatik der Leibniz Universität Hannover, Nr. 361
    Type of Medium: Series available for loan
    Pages: 108 Seiten , Illustrationen, Diagramme
    Series Statement: Wissenschaftliche Arbeiten der Fachrichtung Geodäsie und Geoinformatik der Leibniz Universität Hannover Nr. 361
    Language: English , German
    Note: 1 Introduction 1.1 Motivation 1.2 Problem Statement and Contributions 1.3 Structure 2 State-of-the-art 2.1 Integration of Object Knowledge in Image Space 2.2 Integration of Object Knowledge in Object Space 2.3 Discussion 3 Photogrammetric Pose Estimation with a Generalised Building Model 3.1 Overview 3.2 Hybrid Bundle Adjustment 3.2.1 Modelling Relations of Object Points to Model Planes 3.2.2 Functional Model 3.2.3 Stochastic Model 3.2.4 Robust Estimation 3.2.5 Determination of Initial Values 3.3 Workflow 3.3.1 Global Adjustment 3.3.2 Sliding Window Adjustment 4 Assignment Under Generalisation Effects 4.1 Generalisation Effects 4.2 Direct Assignment: Point-Plane-Matching 4.3 Indirect Assignment: Plane-Plane-Matching 4.3.1 Indirect Assignment without ROIs 4.3.2 Indirect Assignment with ROIs 4.4 Summary of the Assignment Parameters 5 Experiments 5.1 Setup of the experiments 5.1.1 Scenarios 5.1.2 Sequences 5.1.3 Evaluation 5.1.4 Structure of the Experiments 5.2 Dataset 5.2.1 Hardware 5.2.2 Data 5.3 Parameter Settings and Implementation 6 Results and Discussion 6.1 The Short Sequence: Generalisation & Systematic Effects 6.2 The Long Sequence: Generalisation & Systematic Effects, Block Deformations... 6.3 Check Point Errors versus Estimated Standard Deviations 6.4 Sliding Window versus Global Adjustment 6.5 Assignment Strategies 6.6 The Full Sequence 6.7 Parameter Variation 6.7.1 Fictitious Distance Observations of Tie Points 6.7.2 Maximum Distance of Tie Points to Model Planes 6.7.3 Estimation of Vertex Coordinates 6.7.4 Window Size Nws and Overlap AW 7 Conclusion and Outlook , Kurzfassungen in Deutscher und Englischer Sprache
    Location: Lower compact magazine
    Branch Library: GFZ Library
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