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Affiner la recherche Interroger des sources externesGeometrische und stochastische Modelle zur Verarbeitung von 3D-Kameradaten am Beispiel menschlicher Bewegungsanalysen / P. Westfeld (2012)
Titre : Geometrische und stochastische Modelle zur Verarbeitung von 3D-Kameradaten am Beispiel menschlicher Bewegungsanalysen Titre original : [Modèles aléatoires et géométriques pour le traitement de données de caméra 3D en utilisant l'exemple de l'analyse de mouvements humains] Type de document : Thèse/HDR Auteurs : P. Westfeld, Auteur Editeur : Munich : Bayerische Akademie der Wissenschaften Année de publication : 2012 Collection : DGK - C Sous-collection : Dissertationen num. 687 Importance : 283 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-7696-5099-0 Note générale : Bibliographie Langues : Allemand (ger) Descripteur : [Vedettes matières IGN] Applications photogrammétriques
[Termes descripteurs IGN] chambre 3D
[Termes descripteurs IGN] compensation par faisceauxRésumé : (Auteur) The three-dimensional documentation of the form and location of any type of object using flexible photogrammetric methods and procedures plays a key role in a wide range of technical-industrial and scientific areas of application. Potential applications include measurement tasks in the automotive, machine building and ship building sectors, the compilation of complex 3D models in the fields of architecture, archaeology and monumental preservation and motion analyses in the fields of flow measurement technology, ballistics and medicine. In the case of close-range photogrammetry a variety of optical 3D measurement systems are used. Area sensor cameras arranged in single or multi-image configurations are used besides active triangulation procedures for surface measurement (e.g. using structured light or laser scanner systems).
The use of modulation techniques enables 3D cameras based on photomix detectors or similar principles to simultaneously produce both a grey value image and a range image. Functioning as single image sensors, they deliver spatially resolved surface data at video rate without the need for stereoscopic image matching. In the case of 3D motion analyses in particular, this leads to considerable reductions in complexity and computing time. 3D cameras combine the practicality of a digital camera with the 3D data acquisition potential of conventional surface measurement systems. Despite the relatively low spatial resolution currently achievable", as a mono-sensory real-time depth image acquisition system they represent an interesting alternative in the field of 3D motion analysis.
The use of 3D cameras as measuring instruments requires the modelling of deviations from the ideal projection model, and indeed the processing of the 3D camera data generated requires the targeted adaptation, development and further development of procedures in the fields of computer graphics and photogrammetry. This Ph. D. thesis therefore focuses on the development of methods of sensor calibration and 3D motion analysis in the context of investigations into inter-human motion behaviour. As a result of its intrinsic design and measurement principle, a 3D camera simultaneously provides amplitude and range data reconstructed from a measurement signal. The simultaneous integration of all data obtained using a 3D camera into an integrated approach is a logical consequence and represents the focus of current procedural development. On the one hand, the complementary characteristics of the observations made support each other due to the creation of a functional context for the measurement channels, with is to be expected to lead to increases in accuracy and reliability. On the other, the expansion of the stochastic model to include variance component estimation ensures that the heterogeneous information pool is fully exploited.
The integrated bundle adjustment developed facilitates the definition of precise 3D camera geometry and the estimation of range-measurement-specific correction parameters required for the modelling of the linear, cyclical and latency defectives of a distance measurement made using a 3D camera.
The integrated calibration routine jointly adjusts appropriate dimensions across both information channels, and also automatically estimates optimum observation weights. The method is based on the same flexible principle used in self-calibration, does not require spatial object data and therefore foregoes the time-consuming determination of reference distances with superior accuracy. The accuracy analyses carried out confirm the correctness of the proposed functional contexts, but nevertheless exhibit weaknesses in the form of non-parameterized range-measurement-specific errors. This notwithstanding, the future expansion of the mathematical model developed is guaranteed due to its adaptivity and modular implementation. The accuracy of a new 3D point coordinate can be set at 5 mm further to calibration. In the case of depth imaging technology - which is influenced by a range of usually simultaneously occurring noise sources - this level of accuracy is very promising, especially in terms of the development of evaluation algorithms based on corrected 3D camera data.
2.5D Least Squares Tracking (LST) is an integrated spatial and temporal matching method developed within the framework of this Ph. D. thesis for the purpose of evaluating 3D camera image sequences. The algorithm is based on the least squares image matching method already established in photogrammetry, and maps small surface segments of consecutive 3D camera data sets on top of one another. The mapping rule has been adapted to the data structure of a 3D camera on the basis of a 2D affine transformation. The closed parameterization combines both grey values and range values in an integrated model. In addition to the affine parameters used to include translation and rotation effects, the scale and inclination parameters model perspective-related deviations caused by distance changes in the line of sight. A pre-processing phase sees the calibration routine developed used to correct optical and distance-related measurement specific errors in input data and measured slope distances reduced to horizontal distances. 2.5D LSI i
an integrated approach, and therefore delivers fully three-dimensional displacement vectors. In addition, the accuracy and reliability data generated by error calculation can be used as decision criteria for integration into an application-specific processing chain. Process validation showed that the integration of complementary data leads to a more accurate, reliable solution to the correspondence problem, especially in the case of difficult contrast ratios within a channel. The accuracy of scale and inclination parameters directly linked to distance correction terms improved dramatically. In addition, the expansion of the geometric model led to significant benefits, and in particular for the matching of natural, not entirely planar surface segments.
The area-based object matching and object tracking method developed functions on the basis of 3D camera data gathered without object contact. It is therefore particularly suited to 3D motion analysis tasks in which the extra effort involved in multi-ocular experimental settings and the necessity of object signalling using target marks are to be avoided. The potential of the 3D camera matching approach has been demonstrated in two application scenarios in the field of research into human behaviour. As in the case of the use of 2.5 D LST to mark and then classify hand gestures accompanying verbal communication, the implementation of 2.5D LST in the proposed procedures for the determination of interpersonal distance and body orientation within the framework of pedagogical research into conflict regulation between pairs of child-age friends facilitates the automatic, effective, objective and high-resolution (from both a temporal and spatial perspective) acquisition and evaluation of data with relevance to behaviour.
This Ph. D. thesis proposes the use of a novel 3D range imaging camera to gather data on human behaviour, and presents both a calibration tool developed for data processing purposes and a method for the contact-free determination of dense 3D motion vector fields. It therefore makes a contribution to current efforts in the field of the automated videographic documentation of bodily motion within the framework of dyadic interaction, and shows that photogrammetric methods can also deliver valuable results within the framework of motion evaluation tasks in the as-yet relatively untapped field of behavioural research.Numéro de notice : 14622 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Thèse étrangère Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=62673 Documents numériques
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14622_dgk-c-687_westfeld.pdfAdobe Acrobat PDF
Titre : Robust determination of station positions and Earth orientation parameters by VLBI intra-technique combination Type de document : Thèse/HDR Auteurs : S. Böckmann, Auteur Editeur : Munich : Bayerische Akademie der Wissenschaften Année de publication : 2012 Collection : DGK - C Sous-collection : Dissertationen num. 684 Importance : 70 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-7696-5096-9 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes descripteurs IGN] analyse combinatoire (maths)
[Termes descripteurs IGN] données ITGB
[Termes descripteurs IGN] interférométrie à très grande base
[Termes descripteurs IGN] méthode robuste
[Termes descripteurs IGN] orientation de la Terre
[Termes descripteurs IGN] valeur aberranteRésumé : (Auteur) In this thesis, it is shown that combining contributions of different VLBI analysis centers, a so called intra-technique combination, improves the robustness and stability of the final VLBI results. For this purpose, a refined combination method has been developed which is in many theoretical and practical aspects superior to combination approaches currently used for comparable geodetic combination tasks. For example, datum-free normal equation systems are used as input, which ensure that the contributions are not deformed by any constraints at all, and the same underlying terrestrial reference frame can be applied during the combination process. Furthermore, a statistically rigorous variance component estimation approach for the relative weighting of the contributions is used. The combination process implies detailed comparisons and analyses of the individual ACs' contributions. From these, as one of the outcomes of this thesis, several systematic differences between the individual contributions were detected and eliminated. The adherence to standards was considerably improved. The combination process itself reduces the "analyst's noise" and damps the impact of outliers. Validations with independent results of other space-geodetic techniques confirm a benefit of up to 15% more accurate results than from individual solutions. Another aspect of this thesis is the general problem of any intra-technique combination, the correlations between the individual contributions. So far, the contributions of different ACs are always treated as independent data sets, although they have been derived from virtually the same set of original observations. It is shown that correlations between the individual ACs' contributions can be determined and rigorously taken in account during the combination process if the combination is performed directly on the level of the observation equations, instead on the level of normal equation systems. The main effect of considering these correlations is that the formal errors of the estimated combined parameters are considerably more realistic, but the parameters as such remain unchanged within their formal errors. Numéro de notice : 14620 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Thèse étrangère Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=62671 Documents numériques
14620_dgk-c-684_bockmann.pdfAdobe Acrobat PDF
Titre : Conflation of provisional cadastral and topographical datasets Type de document : Thèse/HDR Auteurs : David Nyangau Siriba, Auteur Editeur : Munich : Bayerische Akademie der Wissenschaften Année de publication : 2011 Collection : DGK - C, ISSN 0065-5325 num. 673 Importance : 120 p. ISBN/ISSN/EAN : 978-3-7696-5085-3 Note générale : Bibliographie
PhD DissertationLangues : Anglais (eng) Allemand (ger) Descripteur : [Vedettes matières IGN] Bases de données localisées
[Termes descripteurs IGN] appariement de données localisées
[Termes descripteurs IGN] base de données foncières
[Termes descripteurs IGN] base de données topographiques
[Termes descripteurs IGN] cadastre étranger
[Termes descripteurs IGN] conflation
[Termes descripteurs IGN] Kenya
[Termes descripteurs IGN] qualité des données
[Termes descripteurs IGN] réseau routier
[Termes descripteurs IGN] transformation géométriqueRésumé : (auteur) This dissertation investigated the use of a data conflation approach to improve the geometric quality of provisional cadastral datasets using existing higher quality topographical datasets. The main idea is that if there are similar features in both the provisional cadastral datasets and topographical datasets, then geometric quality improvement of provisional cadastres is possible through data conflation techniques. A data conflation approach was developed that consists of four main steps: processing, derivation of a road network usually represented implicitly in cadastral datasets, road network matching, and local geometric transformation of the cadastral datasets. Note de contenu : 1. Introduction
1.1. Background and motivation
1.2. Geometric quality improvement of cadastres
1.3. Overwiew of the proposed approach
1.4. Objectives and focus
1.5. Outline of the thesis
2. Land Management and the Cadastral Concept
2.1. The modern land management paradigm
2.2. The cadastral concept
2.3. Casatral boundaries
2.4. Homogeneous cadastral framework
2.5. Evolution of the cadastral concept
3. The Kenyan Cadastre and Modern Land Administration
3.1. Historical outline of the Kenyan cadastre
3.2. Land tenure and land tenure patterns
3.3. The Kenyan cadastre
3.4. Nationwide topographical mapping
3.5. The Kenyan cadastre and modern land administration
3.6. Summary of challenges and suggested solutions
4. Quality Improvement and Spatial Data Integration
4.1. Spatial data quality and uncertainty
4.2. Geometric quality improvement of different cadastral datasets
4.3. Quality improvement of provisional graphical cadastres
4.4. Interoperability and data intergration
4.5. Basic concepts in spatial data integration
4.6. Heterogeneities in spatial data
4.7. Spatial data integration workflow
5. Conflation of Provisional Cadastral Datasets
5.1. Data conflation of graphical cadastres
5.2. Pre-processing
5.3. Derivation of a road network from a cadastral dataset
5.4. Feature matching
5.5. Geometric transformation
5.6. Piece-wise affine transformation
5.7. Assessment of quality improvement
6. Experimentation and Analysis
6.1. Experimental data
6.2. Goal and organization of the analysis
6.3. Derivation of the road polygons
6.4. Road network matching
6.5. Geometric transformation and aligment
7. Conclusion
7.1. Discussion
7.2. OutlookNuméro de notice : 19785 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Thèse étrangère Note de thèse : PhD Dissertation : : Stuttgart : 2011 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=84899 Documents numériques
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Conflation of Provisional Cadastral and Topographical DatasetsAdobe Acrobat PDFDie Entwicklung photogrammetrischer Verfahren und Instrumente bei Carl Zeiss in Oberkochen / D. Hobbie (2010)
Titre : Die Entwicklung photogrammetrischer Verfahren und Instrumente bei Carl Zeiss in Oberkochen Titre original : [Le développement de méthodes et d'instruments photogrammétriques chez Carl Zeiss à Oberkochen] Type de document : Monographie Auteurs : D. Hobbie, Auteur Editeur : Munich : Bayerische Akademie der Wissenschaften Année de publication : 2010 Collection : DGK - E Sous-collection : Geschichte und Entwicklung der Geodäsie num. 030 Importance : 144 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-7696-9673-8 Note générale : Bibliographie Langues : Allemand (ger) Descripteur : [Vedettes matières IGN] Photogrammétrie ancienne
[Termes descripteurs IGN] appareil de restitution
[Termes descripteurs IGN] chambre de prise de vue numérique
[Termes descripteurs IGN] chambre de prise de vues argentique
[Termes descripteurs IGN] DMC
[Termes descripteurs IGN] image aérienne
[Termes descripteurs IGN] instrument ancien
[Termes descripteurs IGN] instrument de photogrammétrie
[Termes descripteurs IGN] instrumentation Zeiss
[Termes descripteurs IGN] photogrammétrie aérienne
[Termes descripteurs IGN] photogrammétrie terrestre
[Termes descripteurs IGN] photographie aérienne
[Termes descripteurs IGN] planimat
[Termes descripteurs IGN] vingtième siècleNote de contenu : 1. Einleitung
2. Vorgeschichte
3. Wiederbeginn in Oberkochen
4. Rekonstruktion
4.1 Stereoskope und Luftbildumzeichner
4.2 Radialschlitzstanzen
4.3 Laborgeräte
4.4 stereoplanigraph
5. Ergänzung durch Neukonstruktion
5.1 stereotop
5.2 Entzerrungsgerät SEG
5.3 RMK 21/18 mit TOPAR 4/210
5.4 RMK 15/23 mit PLEOGON 5,6/153
5.5 Statoskop S 2 c
5.6 reduktor
6. Neuentwicklungen nach 1956
7. Luftbildaufnahme
7.1 RMK-Familie mit A-Charakteristik
7.2 Uberweitwinkelkammer RMK A 8,5/23
7.3 Geräte zur Kammersteuerung
7.4 RMK A im Weltraumeinsatz
7.5 Bildwanderungskompensation
7.6 RMK TOP und T-AS
7.7 Bildflugnavigation T-Flight
7.8 DMC
7.9 Kammerkalibrierung
8. Luftbildauswertung photographisch
8.1 Orthoprojektor GlGAS ZEISS (GZ 1)
8.2 Optische Interpolation im GZ l
8.3 Höhendarstellung im GZ l
8.4 ITEK Korrektor EC 5
8.5 ORTHO-3-PROJEKTOR
8.6 orthocomp Z 2
8.7 Programmsystem HIFI
8.8 PHODIS-OP
9. Luftbildauswertung numerisch
9.1 Koordinatenregistrierung
9.2 Präzisions-Stereokomparator PSK
9.3 Präzisionskomparator PK l
9.4 Punktmarkiergeräte
10. Luftbildauswertung graphisch
10.1 Prototypentwicklungen 1960- 1963
10.2 Doppelprojektor DP
10.3 Planimat
10.4 Planicart
10.5 Planitop
10.6 Graphische Ausgabe
10.7 Graphische Datenerfassung
11. Luftbildauswertung analytisch
11.1 stereocord
11.2 planicomp C 100
11.3 Weiterentwicklung C 100
11.4 "Z1P" - zeiss-intergraph Projekt
11.5 planicomp P-Serie
12. Luftbildauswertung digital
12.1 photoscan
12.2 scai
12.3 phodis
13. Terrestrische Photogra mmetrie
13.1 Terrestrische Messkammern
13.2 terragraph
13.3 Sonstiges
14. Sonderanwendungen
14.1 Ballistische Messkammern
14.2 Stereo-Röntgenkomparator StR
14.3 Differenzen-Sichtprüfgerät vitest
14.4 GEOS-1
15. Fernerkundung & Aufklärung
15.1 Reihenbildner KRb und TRb
15.2 Modulares Aufklärungssystem KS-153
15.3 Fernerkundung
16. Die Photogrammetrie-Entwicklung und ihre Mitarbeiter
16.1 Die Entwicklung in einigen Zahlen
16.2 Patente und Publikationen
16.3 Sonstige Tätigkeiten
16.4 Mitarbeiter und Abteilungen
16.5 Der Weg in die Zukunft
17. LiteraturverzeichnisNuméro de notice : 13938 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=62583 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13938-01 33.01 Livre Centre de documentation En réserve 2S (M-103) Disponible
Titre : Physically consistent system model for the study of the Earth's rotation, surface deformation and gravity field parameters : scientific results of the DFG project Type de document : Monographie Auteurs : A. Hense, Auteur ; J. Sündermann, Auteur ; Hermann Drewes, Auteur ; et al., Auteur Editeur : Munich : Bayerische Akademie der Wissenschaften Année de publication : 2009 Collection : DGK - B Sous-collection : Angewandte Geodäsie num. 317 Importance : 53 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-7696-8596-1 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique
[Termes descripteurs IGN] champ de pesanteur terrestre
[Termes descripteurs IGN] circulation atmosphérique
[Termes descripteurs IGN] circulation océanique
[Termes descripteurs IGN] déformation de la croute terrestre
[Termes descripteurs IGN] modèle hydrographique
[Termes descripteurs IGN] modèle physique
[Termes descripteurs IGN] pesanteur terrestre
[Termes descripteurs IGN] rotation de la Terre
[Termes descripteurs IGN] surcharge océanique
[Termes descripteurs IGN] terme de ChandlerRésumé : (Auteur) [introduction] This report is the final report of a serie of projects which studied the Earth's rotational parameters angular momentum, tensor of inertia as well as related variables of the Earth's gravitational field. A system view has been taken by trying to incorporate the contributions from the various subsystems of the Earth system in a physically consistent way. This introduction will highlight the project history and performance since 1996 and the state of the art in 2000. Note de contenu : 1. Introduction
1.1 The projects
1.2 Historical overview and motivations
2. Models of subsystems
2.1 Atmosphere models ECHAM
2.1.1 ECHAM5
2.1.2 Stand-alone atmosphere 20th century simulation
2.1.3 Results
2.2 Ocean model OMCT
2.3 Hydrological Discharge Model HDM
2.3.1 Continental hydrology modelling
2.3.1.1 SLS model component
2.3.1.2 HDM model component
2.3.1.3 Atmospheric forcing data
2.3.2 Results
2.3.2.1 Implementation of a 3-D relief model
2.3.2.2 Calculation of gravity field coefficients
2.3.2.3 Test simulations and validation of continental discharge with ECHAM4 and NCEP
2.3.2.4 Verification of simulated continental runoff (control runs)
2.3.2.5 Interface adaptation and verification of mass conservation at the boundaries in the coupled model system
2.3.2.6 Validation and analysis of continental water mass transports of ECOCTH
2.3.2.7 Statistical analysis and validation of simulated gravity field variations
2.3.2.8 Global water balance
2.3.3 Summary
3. Models of the coupled system
3.1 Coupled atmosphere-hydrosphere model ECOCTH
3.1.1 Model description
3.1.2 Validation
3.1.2.1 The lunisolar ocean tides
3.1.2.2 Global ocean circulation
3.1.2.3 Tropical variability and global warming
3.1.3 Results
3.1.3.1 Inter-annual variations and secular trends in length of day
3.2 Dynamic model of Earth rotation, gravity and surface deformation DyMEG
3.2.1 Numerical solution of the Liouville differential equation
3.2.2 Inverse model for surface deformations of the solid Earth due to mass loads
4. Results for Earth rotation, surface deformation and gravity
4.1 Validation of DyMEG with NCEP and ECCO
4.2 Results of DyMEG with ECOCTH forcing
5. Scientific highlights
5.1 Tidal mixing
5.1.1 Tidal mixing in OMCT2
5.1.2 Effect of tidal mixing on ocean water mass properties
5.2 Secular and decadal variations
5.2.1 Coupled simulation of Earth Rotation Parameters
5.2.2 Axial AAM long-term trends in 21st century scenario runs
5.3 Forcing mechanisms of the Chandler oscillation
5.3.1 Atmospheric and hydrospheric excitation of the Chandler oscillation
5.3.2 Noise as excitation mechanism of the Chandler oscillation
6. Conclusions and outlook
7. ReferencesNuméro de notice : 15454 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=62723 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15454-01 30.40 Livre Centre de documentation Géodésie Disponible PermalinkPermalinkPermalinkPermalinkNational report of the Federal Republic of Germany on the geodetic activities in the years 2003-2007, XXIV [24th] general assembly of the International Union for Geodesy and Geophysics (IUGG) 2007 in Perugia, Italy / J. Muller (2007)
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