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A pipeline of 3D scene reconstruction from point clouds / Lingli Zhu (2015)  

Public Titre : A pipeline of 3D scene reconstruction from point clouds Type de document : Thèse/HDR Auteurs : Lingli Zhu, Auteur ; Henrik Haggren, Directeur de thèse Editeur : Helsinki : Finnish Geodetic Institute FGI Année de publication : 2015 Collection : Publications of the Finnish Geodetic Institute, ISSN 0085-6932 num. 157 Importance : 206 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-951-48-0246-1 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées [Termes IGN] base de données topographiques [Termes IGN] détection d'objet [Termes IGN] détection du bâti [Termes IGN] données lidar [Termes IGN] données localisées 3D [Termes IGN] reconstruction 3D du bâti [Termes IGN] reconstruction de route [Termes IGN] réseau routier Résumé : (auteur) 3D technologies are becoming increasingly popular as their applications in industrial, consumer, entertainment, healthcare, education, and governmental increase in number. According to market predictions, the total 3D modeling and mapping market is expected to grow from $1.1 billion in 2013 to $7.7 billion by 2018. Thus, 3D modeling techniques for different data sources are urgently needed. This thesis addresses techniques for automated point cloud classification and the reconstruction of 3D scenes (including terrain models, 3D buildings and 3D road networks). First, georeferenced binary image processing techniques were developed for various point cloud classifications. Second, robust methods for the pipeline from the original point cloud to 3D model construction were proposed. Third, the reconstruction for the levels of detail (LoDs) of 1-3 (CityGML website) of 3D models was demonstrated. Fourth, different data sources for 3D model reconstruction were studied. The strengths and weaknesses of using the different data sources were addressed. Mobile laser scanning (MLS), unmanned aerial vehicle (UAV) images, airborne laser scanning (ALS), and the Finnish National Land Survey’s open geospatial data sources e.g. a topographic database, were employed as test data. Among these data sources, MLS data from three different systems were explored, and three different densities of ALS point clouds (0.8, 8 and 50 points/m2) were studied. The results were compared with reference data such as an orthophoto with a ground sample distance of 20cm or measured reference points from existing software to evaluate their quality. The results showed that 74.6% of building roofs were reconstructed with the automated process. The resulting building models provided an average height deviation of 15 cm. A total of 6% of model points had a greater than one-pixel deviation from laser points. A total of 2.5% had a deviation of greater than two pixels. The pixel size was determined by the average distance of input laser points. The 3D roads were reconstructed with an average width deviation of 22 cm and an average height deviation of 14 cm. The results demonstrated that 93.4% of building roofs were correctly classified from sparse ALS and that 93.3% of power line points are detected from the six sets of dense ALS data located in forested areas. This study demonstrates the operability of 3D model construction for LoDs of 1-3 via the proposed methodologies and datasets. The study is beneficial to future applications, such as 3D-model-based navigation applications, the updating of 2D topographic databases into 3D maps and rapid, large-area 3D scene reconstruction. Numéro de notice : 21975 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Thèse étrangère Note de thèse : Doctoral thesis : Geoinformatics : Aalto university : 2015 En ligne : https://aaltodoc.aalto.fi/bitstream/handle/123456789/16214/isbn9789514802478.pdf [...] Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=93653

Feasibility of terrestrial laser scanning for plotwise forest inventories / Xinlian Liang (2013)  

Public Titre : Feasibility of terrestrial laser scanning for plotwise forest inventories Type de document : Thèse/HDR Auteurs : Xinlian Liang, Auteur ; Henrik Haggren, Directeur de thèse Editeur : Helsinki : Finnish Geodetic Institute FGI Année de publication : 2013 Collection : Publications of the Finnish Geodetic Institute, ISSN 0085-6932 num. 149 Importance : 150 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-951-711-299-4 Note générale : bibliographie, ISBN du pdf Department of Real Estate, Planning and Geoinformatics, Aalto University Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie [Termes IGN] biomasse aérienne [Termes IGN] détection de changement [Termes IGN] données lidar [Termes IGN] données localisées 3D [Termes IGN] Finlande [Termes IGN] inventaire forestier (techniques et méthodes) [Termes IGN] semis de points [Termes IGN] volume en bois Résumé : (auteur) Detailed, up-to-date forest information is increasingly important in quantitative forest inventories. The accuracy of the information retrieval is highly dependent on the quality and quantity of the reference data collected on field sample plots. In practice, the plotwise forest data are used as a reference for the calibration of large-area inventory data measured by aerial and space-borne remote sensing techniques. Field reference data are conventionally collected at the sample plot level by manual measurements. Because of the high costs and labor intensity of manual measurements, the number of tree attributes collected is limited. Some of the most important tree attributes are not even measured or sampled. Terrestrial laser scanning (TLS) has been recently shown to be a promising technique for forest-related studies. Many tree attributes have been correlated with measurements from TLS data. Numerous TLS methods have been proposed. 6However, the feasibility of applying TLS in plotwise forest inventories is still unclear. The major missing factor is automation of data processing. Other factors hampering the acceptance of the technology include the relatively high cost of the TLS instrument, the low measurement accuracy achieved using the automated data processing currently available, and the shortage of experimental results related to the retrieval of advanced stem attributes (e.g., stem curve) and to different forest conditions. In this study, a series of methods to map sample plots were developed, and their applicability in plotwise forest inventories was analyzed. The accuracy of stem mapping, the efficiency of data collection, and the limitations of the techniques were discussed. The results indicate that TLS is capable of documenting a forest sample plot in detail and that automated mapping methods yield accurate measurements of the most important tree attributes, such as diameter at breast height and stem curve. The fully-automated TLS data processing that was developed in this study resulted in measurement accuracy similar to that of manual measurements using conventional tools or models and of manual measurements from point cloud data. The results of this study support the feasibility of TLS for practical forest field inventories. Further research is needed to explore new protocols for the application of TLS in field inventories. Three possible new directions are the integration of detailed tree attributes (e.g., stem curve, volume, and biomass) in large-area inventories, the utilization of TLS field plots in national forest inventories, and the mapping of large sample plots, e.g., in operational harvest planning. More studies need to be performed on sample plots under different forest conditions (development class, tree species, and amount of ground vegetation). Numéro de notice : 26025 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Thèse étrangère En ligne : https://aaltodoc.aalto.fi/bitstream/handle/123456789/11355/isbn9789517112994.pdf [...] Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=93651

vol 17 n° 1 - mars 2000 (Bulletin de Photogrammetric Journal of Finland) / Henrik Haggren

Public [n° ou bulletin]  est un bulletin de Photogrammetric Journal of Finland (1931 - )   Titre : vol 17 n° 1 - mars 2000 Type de document : Périodique Auteurs : Henrik Haggren, Coordinateur Année de publication : 2000 Importance : 65 p. Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie [Termes IGN] modèle numérique de terrain [Termes IGN] modélisation 3D [Termes IGN] radar à antenne synthétique [Termes IGN] télédétection électromagnétique [Termes IGN] télémétrie laser aéroporté [Termes IGN] tomographie Numéro de notice : 68972 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Numéro de périodique Permalink : https://documentation.ensg.eu/index.php?lvl=bulletin_display&id=6836 [n° ou bulletin]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
68972-01	33.30	Revue	Centre de documentation	Photogrammétrie - Lasergrammétrie	Disponible

Statistical analysis of two 3-D registration and modeling strategies / O. Jokinen in ISPRS Journal of photogrammetry and remote sensing, vol 53 n° 6 (November - December 1998)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 53 n° 6 (November - December 1998) . - pp 320 - 341 Titre : Statistical analysis of two 3-D registration and modeling strategies Type de document : Article/Communication Auteurs : O. Jokinen, Auteur ; Henrik Haggren, Auteur Année de publication : 1998 Article en page(s) : pp 320 - 341 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] contrôle statistique [Termes IGN] matrice de covariance [Termes IGN] modélisation 3D [Termes IGN] propagation d'erreur [Termes IGN] superposition d'images [Termes IGN] test statistique Résumé : (Auteur) The paper deals with the registration and modeling of multiple 3-D profile maps acquired from different viewpoints by light striping. We analyze the propagation of measurement and calibration errors to the registration parameters and further to the reconstructed model of the scene consisting of planar patches. The analysis is performed for two strategies. In the first strategy, the maps are registered simultaneously using the Levenberg-Marquardt method to update the registration parameters and the model computed afterwards while in the second one, the maps are registered sequentially against the model reconstructed up till then using the method of unit quatemions to update the registration parameters. Our statistical analysis thus combines the registration and modeling steps, and in registration, we determine the corresponding points either on the parametric domains of the maps or as closest points in 3-D using the information from the parametric domain to restrict the search for the closest points. We also point out the precise estimation of the covariance matrix of the solution given by the Levenberg-Marquardt method. We illustrate the results of our analysis with real data from a scale model of an urban area. Copyright ISPRS Numéro de notice : A1998-245 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/S0924-2716(98)00017-3 En ligne : https://doi.org/10.1016/S0924-2716(98)00017-3 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29437 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
081-98061	SL	Revue	Centre de documentation	Revues en salle	Disponible

Mapvision : the photogrammetric machine vision system / Henrik Haggren in Photogrammetric Engineering & Remote Sensing, PERS, vol 53 n° 8 (august 1987)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 53 n° 8 (august 1987) . - pp 1103 - 1108 Titre : Mapvision : the photogrammetric machine vision system Type de document : Article/Communication Auteurs : Henrik Haggren, Auteur ; E. Leikas, Auteur Année de publication : 1987 Article en page(s) : pp 1103 - 1108 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie analytique [Termes IGN] appareil de restitution analytique [Termes IGN] Finlande [Termes IGN] logiciel de restitution [Termes IGN] Microprocesseur Numéro de notice : A1987-193 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans En ligne : https://www.asprs.org/wp-content/uploads/pers/1987journal/aug/1987_aug_1103-1108 [...] Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=24283 [article]

Real-time photogrammetry as used for machine vision applications / Henrik Haggren in Canadian surveyor, vol 41 n° 2 (Summer 1987)

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