Relevant bibliographies by topics / 3D model database

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic '3D model database'

Author: Grafiati
Published: 4 June 2021
Last updated: 25 May 2024

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Journal articles on the topic "3D model database"

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Abdul Rahman, A., H. Rashidan, I. A. Musliman, G. Buyuksalih, S. Bayburt, and P. Baskaraca. "3D GEOSPATIAL DATABASE SCHEMA FOR ISTANBUL 3D CITY MODEL." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-4/W16 (October 1, 2019): 11–16. http://dx.doi.org/10.5194/isprs-archives-xlii-4-w16-11-2019.

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Abstract. This paper describes the development of 3D database for Istanbul 3D city models. The schema is based on object-relational technology and also called spatially-enhanced relational database management system (SRDBMS). The 3D city models were generated based on LiDAR points cloud with other several typical GIS datasets like terrain, orthophoto, Point of Interests (POIs), and other attribute data. The database is based on PostGIS schema and CityGML schema (3DCityDB). Two major datasets, namely, terrain data (with several formats), and 3D city models were populated in the database. Terrain and attributes data retrieval are based on Web Feature Service (WFS) whereas 3D models were visualized via 3D Tiles format in Cesium platform. Two issues were also highlighted in the paper with respect to 3D attributes linkages and 3D complex objects.
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Wang, Xiao Gang, Xin Zhan Li, and Yue Li. "A Pattern Making System Based on Clothes Databases." Applied Mechanics and Materials 55-57 (May 2011): 1073–78. http://dx.doi.org/10.4028/www.scientific.net/amm.55-57.1073.

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In this article based on databases of 3D female bodies emulator, 3D jacket emulator, textile material parameters, historical photos and pattern parameters, an automatic pattern making and its 3D emulator model support system of woman warm jacket was developed. In this system different databases were set up and mathematic models of body block and pattern were founded, which they were the main algorithms of program. Program of connecting databases for pattern making was developed and its 3D emulator model was realized synchronization. Based on 20 variables for the female body, the net body block is first be made for individuality and its 3D model also is offered. Then according to the parameters from textile material database and pattern database, pattern is automatically made on the base of the body block. At the same time its 3D jacket model can be presented to user by this system. In this system, managing and connecting different types of databases were come true. This new automatic designing method differs with the traditional pattern making, which introduced the database technology to make works automatically and present 3D emulator model synchronously. This open system is offered user with spreading the database possible and connecting with ready CAD system.
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Philipp-Foliguet, Sylvie, Michel Jordan, Laurent Najman, and Jean Cousty. "Artwork 3D model database indexing and classification." Pattern Recognition 44, no. 3 (March 2011): 588–97. http://dx.doi.org/10.1016/j.patcog.2010.09.016.

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Salleh, S., U. Ujang, and S. Azri. "TOPOLOGY MODELS AND RULES: A 3D SPATIAL DATABASE APPROACH." International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLVIII-1/W2-2023 (December 13, 2023): 117–22. http://dx.doi.org/10.5194/isprs-archives-xlviii-1-w2-2023-117-2023.

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Abstract. Spatial databases are a key component of 3D applications that require the storage, management, and manipulation of 3D objects. Topological information that describes the containment, adjacency, and connectivity of objects within a 3D space is crucial for complex spatial analysis. The need to maintain optimal storage and computation within spatial databases recommends the use of lightweight approaches such as topology rules and models. However, current spatial databases use 2D topology mechanisms and limited 3D topology functions. This study conducted experiments on existing topology rules and models within ArcGIS and Oracle spatial database. Additional 3D topology rules were also implemented to determine topological relationships between 3D objects stored in Oracle. The 3D topology rules were based on a 36-Intersection Model (36IM) that describes intersections between objects from 0D to 3D. Based on the experiments, the 2D geodatabase topology rules within ArcGIS were able to determine topological relationships between the objects stored as 2D multi-surfaces datatype. The 2D topology rules and the topology model within Oracle were also unable to support topological relationships between 3D objects. The addition of 36IM topology rules could determine topological relationships and describe the dimensions of intersections. Evidently, the support for 3D topology within spatial databases depends on the availability of 3D datatypes. Most databases that support 3D datatypes have limited support for 3D topology, whereby existing topology mechanisms require the decomposition of 3D objects. The use of 3D topology rules supports the maintenance of topological information without breaking down 3D objects into lower dimension components.
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Xu, Weiping, Qing Zhu, Zhiqiang Du, and Yeting Zhang. "Design and implementation of 3D model database for general-purpose 3D GIS." Geo-spatial Information Science 13, no. 3 (January 2010): 210–15. http://dx.doi.org/10.1007/s11806-010-0309-7.

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Halim, Nur Zurairah Abdul, Chan Keat Lim, and Hairi Karim. "Developing a 3D City Model Database Beyond Cadastral Purposes." IOP Conference Series: Earth and Environmental Science 767, no. 1 (May 1, 2021): 012027. http://dx.doi.org/10.1088/1755-1315/767/1/012027.

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Li, Lei. "Design and Implementation of Petrochemical 3D Model Database Platform." IOP Conference Series: Materials Science and Engineering 768 (March 31, 2020): 072028. http://dx.doi.org/10.1088/1757-899x/768/7/072028.

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Cai, Ying, Menglong Yang, and Ziqiang Li. "Robust Head Pose Estimation Using a 3D Morphable Model." Mathematical Problems in Engineering 2015 (2015): 1–10. http://dx.doi.org/10.1155/2015/678973.

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Head pose estimation from single 2D images has been considered as an important and challenging research task in computer vision. This paper presents a novel head pose estimation method which utilizes the shape model of the Basel face model and five fiducial points in faces. It adjusts shape deformation according to Laplace distribution to afford the shape variation across different persons. A new matching method based on PSO (particle swarm optimization) algorithm is applied both to reduce the time cost of shape reconstruction and to achieve higher accuracy than traditional optimization methods. In order to objectively evaluate accuracy, we proposed a new way to compute the pose estimation errors. Experiments on the BFM-synthetic database, the BU-3DFE database, the CUbiC FacePix database, the CMU PIE face database, and the CAS-PEAL-R1 database show that the proposed method is robust, accurate, and computationally efficient.
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Mao, B., L. Harrie, J. Cao, Z. Wu, and J. Shen. "NoSQL Based 3D City Model Management System." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-4 (April 23, 2014): 169–73. http://dx.doi.org/10.5194/isprsarchives-xl-4-169-2014.

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To manage increasingly complicated 3D city models, a framework based on NoSQL database is proposed in this paper. The framework supports import and export of 3D city model according to international standards such as CityGML, KML/COLLADA and X3D. We also suggest and implement 3D model analysis and visualization in the framework. For city model analysis, 3D geometry data and semantic information (such as name, height, area, price and so on) are stored and processed separately. We use a Map-Reduce method to deal with the 3D geometry data since it is more complex, while the semantic analysis is mainly based on database query operation. For visualization, a multiple 3D city representation structure CityTree is implemented within the framework to support dynamic LODs based on user viewpoint. Also, the proposed framework is easily extensible and supports geoindexes to speed up the querying. Our experimental results show that the proposed 3D city management system can efficiently fulfil the analysis and visualization requirements.
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Jia, Hui, Guo Hua Geng, and Jin Xia Yang. "Research on Construction of Semantic Web of 3D Model Database." Advanced Materials Research 532-533 (June 2012): 1263–67. http://dx.doi.org/10.4028/www.scientific.net/amr.532-533.1263.

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This paper presented a new method to construct semantic web of three-dimension model database based on ontology. Firstly we build ontology of three-dimension model database, according the model to extract classes, objects and attributes. Secondly utilize WordNet which is an English ontology to expand original ontology node to semantic extension node, including synonym, hypernym, hyponym and holonym. Experiment result shows that this method not only effectively expands the semantic vocabularies of a 3D model database, but also keeps good semantic relevance of the expanded vocabularies to the original ones, so as to achieve semantic based 3D model retrieval effectively.
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Dissertations / Theses on the topic "3D model database"

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Massimo, Giuseppe. "Applicazione in AR e Realtime Database con Unity 3D." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/22962/.

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Nella tesi verrà mostrata la realizzazione di un applicativo dotato di funzionalità di Realtà Aumentata attraverso Unity 3D. Inizialmente verrà fornita una panoramica sulla Augmented Reality e come viene utilizzata oggi, verranno descritti gli strumenti utilizzati e le scelte implementative più importanti. L'applicazione realizzata permette di istanziare oggetti nello spazio circostante e recuperare i modelli tridimensionali da un Realtime Database (Firebase). L'app è stata sviluppata per sistemi Android.
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Marešová, Kristýna. "Analýza únikových tras v 3D modelu budovy." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-390179.

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The primary object of the master thesis is creating escape route analysis in 3D model of a building. Analysis is created using mainly open source tools like PostgreSQL with PostGIS and pgRouting extensions.
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Haslauer, Claus P. "Hydrogeologic Analysis of a Complex Aquifer System and Impacts of Changes in Agricultural Practices on Nitrate Concentrations in a Municipal Well Field: Woodstock, Ontario." Thesis, University of Waterloo, 2005. http://hdl.handle.net/10012/1223.

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The Thornton Well Field, located in an area of dominantly (~80%) agricultural land-use, produces ~50% of the drinking water for the city of Woodstock. Since the mid 1990?s nitrate concentrations in some of the supply wells are above the Maximum Allowable Concentration (MAC) of 10mg-N/L. The source of the nitrate is believed to be from agricultural fertilizing practices. As response to this problem, the County of Oxford purchased 111 hectares of farmland within the capture zone of the Thornton Well Field. This land is rented back to farmers with restrictions placed on the amount of nitrate fertilizer that can be applied in an attempt to sustainably reduce the nitrate concentrations in the ThorntonWell Field below MAC.

The objective of this thesis is to improve the site conceptual hydrogeologic model, both at a spatial scale suitable for numerical analysis through regional groundwater flow modelling (representative distance ~9km) and at a smaller scale (representative distance ~2km) for nitrate transport modelling in the vicinity of the Thornton Well Field and the purchased land. Field investigations aimed to support the site hydrogeologic model involved drilling, geologic logging, and instrumentation of a 72m deep borehole completed to bedrock in the center of the nitrate plume, at the border of the farmland under consideration. The shallow subsurface features encountered during this initial drilling operation were tracked below the farm fields with geophysical tools and additional drilling and core logging throughout the field site. Transient hydraulic head observations in combination with on-site precipitation measurements were used to indicate where a hydraulic connection between ground surface and deeper layers exists, which allow rapid infiltration to occur into a glaciofluvial outwash channel which was identified as one important pathway for nitrate transport to the Thornton Well Field. One receptor at the end of that pathway, the screen of the supply Well 01, was depth-discrete profiled for water inflow and nitrate concentrations to obtain better characteristics of the receptor.

A method was developed to estimate the nitrate mass stored in the unsaturated zone below Parcel B, permitting an estimation of the time frame required for flushing the nitrate out of this zone, and the anticipated effects on nitrate concentrations in the supply wells. The spatial distribution of nitrate concentrations in the unsaturated zone and in the aquifer units was analyzed. It was found that the nitrate concentration within the unsaturated zone below Parcel B is ~16mg-N/L, resulting in a total nitrogen mass of ~20t within that zone. It was shown that significant reductions (~10%) in nitrate concentrations in the supply wells of the Thornton Well Field can be achieved, assuming zero nitrate mass influx into the domain from Parcel B.

A comprehensive data base was developed to organize, manage, and analyze all site measured data for that purpose, and regional hydrogeologic data from the MOE Water Well Record Database. The contents of this database in conjunction with the MOE Water Well Record Database were used to construct a three-dimensional digital representation of the hydrostratigraphic units at a regional and at a local scale. This three-dimensional hydrostratigraphic unit spatial distribution along with surface watershed information and potentiometric surfaces of the various aquifer units will be used to define a suitable spatial domain and associated boundary conditions for future modelling efforts. This hydrostratigraphic model will serve as basis for predicting the effects of agricultural land-use changes within the capture zone of the Thornton Well Field (Parcel B) on the nitrate concentrations in the supply wells of the Thornton Well Field.
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Sambra-Petre, Raluca-Diana. "2D/3D knowledge inference for intelligent access to enriched visual content." Phd thesis, Institut National des Télécommunications, 2013. http://tel.archives-ouvertes.fr/tel-00917972.

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This Ph.D. thesis tackles the issue of sill and video object categorization. The objective is to associate semantic labels to 2D objects present in natural images/videos. The principle of the proposed approach consists of exploiting categorized 3D model repositories in order to identify unknown 2D objects based on 2D/3D matching techniques. We propose here an object recognition framework, designed to work for real time applications. The similarity between classified 3D models and unknown 2D content is evaluated with the help of the 2D/3D description. A voting procedure is further employed in order to determine the most probable categories of the 2D object. A representative viewing angle selection strategy and a new contour based descriptor (so-called AH), are proposed. The experimental evaluation proved that, by employing the intelligent selection of views, the number of projections can be decreased significantly (up to 5 times) while obtaining similar performance. The results have also shown the superiority of AH with respect to other state of the art descriptors. An objective evaluation of the intra and inter class variability of the 3D model repositories involved in this work is also proposed, together with a comparative study of the retained indexing approaches . An interactive, scribble-based segmentation approach is also introduced. The proposed method is specifically designed to overcome compression artefacts such as those introduced by JPEG compression. We finally present an indexing/retrieval/classification Web platform, so-called Diana, which integrates the various methodologies employed in this thesis
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Sambra-Petre, Raluca-Diana. "2D/3D knowledge inference for intelligent access to enriched visual content." Electronic Thesis or Diss., Evry, Institut national des télécommunications, 2013. http://www.theses.fr/2013TELE0012.

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Cette thèse porte sur la catégorisation d'objets vidéo. L'objectif est d'associer des étiquettes sémantiques à des objets 2D présents dans les images/vidéos. L'approche proposée consiste à exploiter des bases d'objets 3D classifiés afin d'identifier des objets 2D inconnus. Nous proposons un schéma de reconnaissance d'objet, conçu pour fonctionner pour des applications en temps réel. La similitude entre des modèles 3D et des contenus 2D inconnu est évaluée à l'aide de la description 2D/3D. Une procédure de vote est ensuite utilisée afin de déterminer les catégories les plus probables de l'objet 2D. Nous proposons aussi une stratégie pour la sélection des vues les plus représentatives d'un objet 3D et un nouveau descripteur de contour (nommé AH). L'évaluation expérimentale a montré que, en employant la sélection intelligente de vues, le nombre de projections peut être diminué de manière significative (jusqu'à 5 fois) tout en obtenant des performances similaires. Les résultats ont également montré la supériorité de l'AH par rapport aux autres descripteurs adoptés. Une évaluation objective de la variabilité intra et inter classe des bases de données 3D impliqués dans ce travail est également proposé, ainsi qu'une étude comparative des approches d'indexations retenues. Une approche de segmentation interactive est également introduite. La méthode proposée est spécifiquement conçu pour surmonter les artefacts de compression tels que ceux mis en place par la compression JPEG. Enfin, nous présentons une plate-forme Web pour l'indexation/la recherche/la classification, qui intègre les différentes méthodologies utilisées dans cette thèse
This Ph.D. thesis tackles the issue of sill and video object categorization. The objective is to associate semantic labels to 2D objects present in natural images/videos. The principle of the proposed approach consists of exploiting categorized 3D model repositories in order to identify unknown 2D objects based on 2D/3D matching techniques. We propose here an object recognition framework, designed to work for real time applications. The similarity between classified 3D models and unknown 2D content is evaluated with the help of the 2D/3D description. A voting procedure is further employed in order to determine the most probable categories of the 2D object. A representative viewing angle selection strategy and a new contour based descriptor (so-called AH), are proposed. The experimental evaluation proved that, by employing the intelligent selection of views, the number of projections can be decreased significantly (up to 5 times) while obtaining similar performance. The results have also shown the superiority of AH with respect to other state of the art descriptors. An objective evaluation of the intra and inter class variability of the 3D model repositories involved in this work is also proposed, together with a comparative study of the retained indexing approaches . An interactive, scribble-based segmentation approach is also introduced. The proposed method is specifically designed to overcome compression artefacts such as those introduced by JPEG compression. We finally present an indexing/retrieval/classification Web platform, so-called Diana, which integrates the various methodologies employed in this thesis
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Kós, José Ripper. "Urban spaces shaped by past cultures : historical representation through electronic 3D models and databases." Thesis, University of Strathclyde, 2003. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=21518.

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Digital tools have been increasingly used, in the last decades, for the study and representation of the city history. As the available instruments develop and the researchersb ecome more familiar with them, their use turns out to be more effective and provides richer results. This study aims to explore the use of information technology, particularly 3D models, for the city history research. When this study was elaborated, few initiatives effectivelly applied those new tools to convey the history of the city. A smaller number of published scientific enterprises investigated that operation. Therefore, the study is structured mainly on the analysis of some precedents based on those tools, together with others selected for applying creatively traditional methods. These analyses also raise questionings on related issues such as historical narratives, traditional methods of historical graphic representation or other digital representation modes. The examination of those subjects constitutes the thesis' theoretical part. The conclusion is presented in the form of a digital alternative for the representation of the city history. The tool developed as a prototype is grounded on 3D models representing different periods of the city linked to a database of a great diversity of historical documents. Thus, the city history is accessed through images of the significant sites from the 3D models. The prototype development is based on the assumptions that this process of retrieving historical information related to city spaces facilitates the understanding of the past culture. Furthermore, when the readers associate the space they know in the city to the historical information, they understand better the past culture that shaped it, strengthen their identity and intensify the relationship to the place they dwell in.
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Ottoson, Patrik. "Geographic Indexing and Data Management for 3D-Visualisation." Doctoral thesis, Stockholm : Tekniska högsk, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3235.

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Decker, Jeramy Bruyn. "Building, Updating and Verifying Fracture Models in Real Time for Hard Rock Tunneling." Diss., Virginia Tech, 2007. http://hdl.handle.net/10919/27220.

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Fractures and fracture networks govern the mechanical and fluid flow behavior of rock masses. Tunneling and other rock mechanics applications therefore require the characterization of rock fractures based on geological data. Field investigations produce only a limited amount of data from boreholes, outcrops, cut slopes, and geophysical surveys. In tunneling, the process of excavation creates a priceless opportunity to gather more data during construction. Typically, however, these data are not utilized due to the impedance of sampling and analysis on the flow of construction, and safety concerns with sampling within unlined tunnel sections. However, the use of this additional data would increase the overall safety, quality, and cost savings of tunneling. This study deals with several aspects of the above, with the goal of creating methods and tools to allow engineers and geologists to gather and analysis fracture data in tunnels without interrupting the excavation and without compromising safety. Distribution-independent trace density and mean trace length estimators are developed using principles of stereology. An optimization technique is developed utilizing Differential Evolution to infer fracture size and shape from trace data obtained on two or more nonparallel sampling planes. A method of producing nearly bias free empirical trace length CDF's is also introduced. These new methods and tools were validated using Monte Carlo simulations. A field study was conducted in an existing tunnel allowing the above methods and tools to be further validated and tested. A relational database was developed to aid in storage, retrieval, and analysis of field data. Fracture models were built and updated using fracture data from within the tunnel. Utilization of state of the art imaging techniques allowed for remote sampling and analysis, which were enhanced by the use of 3d visualization techniques.
Ph. D.
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Zavolodko, H., and N. Haidar. "3D Printing in Online Education." Thesis, 2020. https://openarchive.nure.ua/handle/document/17545.

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The review object is the subsystem verification and printing 3D-model online learning system mixed type. To do this, a review of analogues, technologies, stages of printing were identified. The aim is to design with IP topics that uses the additive technologies in the educational process. In the given IDEF – diagram describing the function of the system; authentication rules, verification of 3D-models, sending the model to print, selecting a device online, and basic screen forms.
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"Shape description and retrieval for 3D model search engine." 2014. http://library.cuhk.edu.hk/record=b6116246.

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隨著互聯網上3D模型的大量增加，產生了開發3D模型搜索引擎的需求。本論文提出了一個基於草圖和3D模型的3D模型搜索引擎。
對於使用3D模型作檢索條件的搜索系統，我們提出了兩種新的3D模型描述子，分別叫做Sphere Image 描述子和Bag-of-View-Words (BoVW)描述子。Sphere Image描述子是由一系列投影圖的特徵組成。我們將每一個視角看到的圖形都當作是一個"像素"，把視角的位置看作像素點的位置，把所看到的圖形的特徵值看作是像素值。我們同時也提出了一種基於概率圖的3D模型匹配算法，並開發了一個3D模型檢索系統來檢測我們的算法。BoVW描述子通過3D模型投影圖出現的次數來描述3D模型。我們用一種自適應的聚類算法，對3D模型的所有投影圖進行分類，然後用一個多層次的柱狀圖來描述一個3D模型。我們同時提出一種新的金字塔匹配算法來比較3D模型。我們使用SHREC和普林斯頓的3D模型庫來檢驗我們的系統，實驗結果證明我們的系統在檢索效率和精度上都優與現今的3D模型檢索系統。
對於使用草圖作檢索條件的3D模型搜索系統，我們提出Bigger ExposureOpportunity Views (BEOV) 描述子來表示3D模型，同時提出Shape-Ring描述子來表示草圖。BEOV描述子是由一些特徵圖組成，這些圖的特點是更容易被人們看到。Shape-Ring描述子保留了圖形的輪廓和內部特徵。我們使用SHREC2012草圖數據庫來檢驗我們的系統，實驗結果證明我們的系統在精度和計算複雜度上都優與現今的3D模型檢索系統。
The large number of 3D models on the Internet encourages us to develop 3D model search engines. In this dissertation, we present a 3D model retrieval system using both the 3D model query and the sketch query.
For 3D model query based retrieval system, we propose two new 3D model descriptors, named the Sphere Image and the Bag-of-View-Words (BoVW) descriptor. The Sphere Image is defined as a collection of view features. A viewpoint of a 3D model is regarded as a "pixel": (1) The position of the viewpoint is denoted as the coordinate of the "pixel". (2) The feature descriptor of the projected view is denoted as the value of the "pixel". We also propose a probabilistic graphical model for 3D model matching, and develop a 3D model retrieval system to test our approach. The BoVW descriptor describes a 3D model by measuring the occurrences of its projected views. An adaptive clustering method is applied to reduce the redundancy of the projected views of each 3D model. A 3D model is represented by a multi-resolution histogram, which is combined by several BoVW descriptors at different levels. The codebook is obtained by unsupervised learning. We also propose a new pyramid matching method for 3D model comparison. We have conducted experiments based on the SHape REtrieval Contest (SHREC) 2012 Generic 3D model benchmark and the Princeton Shape Benchmark (PSB). Experimental results indicate that our system outperforms some state-of-the-art 3D model retrieval systems with respect to the retrieval precision and the computational cost.
For sketch query based retrieval system, we propose a Bigger Exposure Opportunity Views (BEOV) descriptor and a Shape-Ring descriptor, for representing the 3D model candidates and the sketch query, respectively. The BEOV descriptor represents a 3D model by several characteristic views, which have more chances to be exposed to people. The Shape-Ring descriptor preserves the features of the contour and the inside detail of the sketch query and the BEOV. Experiments have been conducted based on the SHape REtrieval Contest (SHREC) 2012 and SHREC 2013 sketch track data sets. Our approach outperforms the existing 3D model retrieval methods in terms of the retrieval precision and the computational cost.
Detailed summary in vernacular field only.
Detailed summary in vernacular field only.
Detailed summary in vernacular field only.
Ding, Ke.
Thesis (Ph.D.) Chinese University of Hong Kong, 2014.
Includes bibliographical references (leaves 107-120).
Abstracts also in Chinese.
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Books on the topic "3D model database"

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Costello, P. J. 3D model databases: The availability of 3D models on the World Wide Web. Loughborough: Computing Services, Loughborough University, 1997.

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Ślusarski, Marek. Metody i modele oceny jakości danych przestrzennych. Publishing House of the University of Agriculture in Krakow, 2017. http://dx.doi.org/10.15576/978-83-66602-30-4.

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The quality of data collected in official spatial databases is crucial in making strategic decisions as well as in the implementation of planning and design works. Awareness of the level of the quality of these data is also important for individual users of official spatial data. The author presents methods and models of description and evaluation of the quality of spatial data collected in public registers. Data describing the space in the highest degree of detail, which are collected in three databases: land and buildings registry (EGiB), geodetic registry of the land infrastructure network (GESUT) and in database of topographic objects (BDOT500) were analyzed. The results of the research concerned selected aspects of activities in terms of the spatial data quality. These activities include: the assessment of the accuracy of data collected in official spatial databases; determination of the uncertainty of the area of registry parcels, analysis of the risk of damage to the underground infrastructure network due to the quality of spatial data, construction of the quality model of data collected in official databases and visualization of the phenomenon of uncertainty in spatial data. The evaluation of the accuracy of data collected in official, large-scale spatial databases was based on a representative sample of data. The test sample was a set of deviations of coordinates with three variables dX, dY and Dl – deviations from the X and Y coordinates and the length of the point offset vector of the test sample in relation to its position recognized as a faultless. The compatibility of empirical data accuracy distributions with models (theoretical distributions of random variables) was investigated and also the accuracy of the spatial data has been assessed by means of the methods resistant to the outliers. In the process of determination of the accuracy of spatial data collected in public registers, the author’s solution was used – resistant method of the relative frequency. Weight functions, which modify (to varying degree) the sizes of the vectors Dl – the lengths of the points offset vector of the test sample in relation to their position recognized as a faultless were proposed. From the scope of the uncertainty of estimation of the area of registry parcels the impact of the errors of the geodetic network points was determined (points of reference and of the higher class networks) and the effect of the correlation between the coordinates of the same point on the accuracy of the determined plot area. The scope of the correction was determined (in EGiB database) of the plots area, calculated on the basis of re-measurements, performed using equivalent techniques (in terms of accuracy). The analysis of the risk of damage to the underground infrastructure network due to the low quality of spatial data is another research topic presented in the paper. Three main factors have been identified that influence the value of this risk: incompleteness of spatial data sets and insufficient accuracy of determination of the horizontal and vertical position of underground infrastructure. A method for estimation of the project risk has been developed (quantitative and qualitative) and the author’s risk estimation technique, based on the idea of fuzzy logic was proposed. Maps (2D and 3D) of the risk of damage to the underground infrastructure network were developed in the form of large-scale thematic maps, presenting the design risk in qualitative and quantitative form. The data quality model is a set of rules used to describe the quality of these data sets. The model that has been proposed defines a standardized approach for assessing and reporting the quality of EGiB, GESUT and BDOT500 spatial data bases. Quantitative and qualitative rules (automatic, office and field) of data sets control were defined. The minimum sample size and the number of eligible nonconformities in random samples were determined. The data quality elements were described using the following descriptors: range, measure, result, and type and unit of value. Data quality studies were performed according to the users needs. The values of impact weights were determined by the hierarchical analytical process method (AHP). The harmonization of conceptual models of EGiB, GESUT and BDOT500 databases with BDOT10k database was analysed too. It was found that the downloading and supplying of the information in BDOT10k creation and update processes from the analyzed registers are limited. An effective approach to providing spatial data sets users with information concerning data uncertainty are cartographic visualization techniques. Based on the author’s own experience and research works on the quality of official spatial database data examination, the set of methods for visualization of the uncertainty of data bases EGiB, GESUT and BDOT500 was defined. This set includes visualization techniques designed to present three types of uncertainty: location, attribute values and time. Uncertainty of the position was defined (for surface, line, and point objects) using several (three to five) visual variables. Uncertainty of attribute values and time uncertainty, describing (for example) completeness or timeliness of sets, are presented by means of three graphical variables. The research problems presented in the paper are of cognitive and application importance. They indicate on the possibility of effective evaluation of the quality of spatial data collected in public registers and may be an important element of the expert system.
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Book chapters on the topic "3D model database"

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Nguyen, Dang-Ha, Khanh-An Han Tien, Thi-Chau Ma, and Hoang-Anh Nguyen The. "A New 3D Face Model for Vietnamese Based on Basel Face Model." In Intelligent Information and Database Systems, 408–20. Cham: Springer Nature Switzerland, 2022. http://dx.doi.org/10.1007/978-3-031-21967-2_33.

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Majcher, Mateusz, and Bogdan Kwolek. "3D Model-Based 6D Object Pose Tracking on RGB Images." In Intelligent Information and Database Systems, 271–82. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-41964-6_24.

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Javor, Ante, Goran Dambic, and Leo Mrsic. "Model for Application of Optical Passive SFM Method in Reconstruction of 3D Space and Objects." In Intelligent Information and Database Systems, 443–53. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-73280-6_35.

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Lv, Tian-yang, Yu-hui Xing, Shao-bing Huang, Zheng-xuan Wang, and Wan-li Zuo. "An Auto-stopped Hierarchical Clustering Algorithm for Analyzing 3D Model Database." In Knowledge Discovery in Databases: PKDD 2005, 601–8. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/11564126_63.

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Ohbuchi, Ryutarou, Jun Kobayashi, Akihiro Yamamoto, and Toshiya Shimizu. "Comparison of Dimension Reduction Methods for Database-Adaptive 3D Model Retrieval." In Lecture Notes in Computer Science, 196–210. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-79860-6_16.

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Singer, David, Dorian Rohner, and Dominik Henrich. "Robot-Based Creation of Complete 3D Workpiece Models." In Annals of Scientific Society for Assembly, Handling and Industrial Robotics 2021, 289–99. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-74032-0_24.

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AbstractA complete object database containing a model (representing geometric and texture information) of every possible workpiece is a common necessity e.g. for different object recognition or task planning approaches. The generation of these models is often a tedious process. In this paper we present a fully automated approach to tackle this problem by generating complete workpiece models using a robotic manipulator. A workpiece is recorded by a depth sensor from multiple views for one side, then turned, and captured from the other side. The resulting point clouds are merged into one complete model. Additionally, we represent the information provided by the object’s texture using keypoints. We present a proof of concept and evaluate the precision of the final models. In the end we conclude the usefulness of our approach showing a precision of around 1 mm for the resulting models.
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Qiao, Junfeng, Lin Peng, Aihua Zhou, Lipeng Zhu, Pei Yang, and Sen Pan. "Research and Implementation of Electric Equipment Connectivity Data Analysis Model Based on Graph Database." In 3D Imaging—Multidimensional Signal Processing and Deep Learning, 45–55. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-1145-5_5.

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Clarke, John R. "3D Model, Linked Database, and Born-Digital E-Book: An Ideal Approach to Archaeological Research and Publication." In 3D Research Challenges in Cultural Heritage II, 136–45. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-47647-6_7.

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Shahidinejad, Javad, Mohsen Kalantari, and Abbas Rajabifard. "Challenges and Steps Toward Implementing 3D Cadastral Database—Physical Data Model of LADM." In Lecture Notes in Geoinformation and Cartography, 823–33. Cham: Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-43699-4_49.

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Šormaz, Dušan, Anibal Careaga Campos, and Jaikumar Arumugam. "Generation of an Intermediate Workpiece for Planning of Machining Operations." In Lecture Notes in Mechanical Engineering, 383–93. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-18326-3_37.

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AbstractDigital twins in manufacturing plays a key factor for the digital transformation. A necessary component of any digital twin in manufacturing is a geometric model of a workpiece as it is processed through steps. DT requires solid 3d models, machining features, and information regarding machines, tools, and its constraints such as initial setup, machining direction, etc. The objective of this paper is to generate alternate feature interpretations to identify geometric constraints, machine and tool requirements, and stock materials to generate flexible manufacturing plans that fit a defined criterion. In this study we propose using the IMPlanner system to retrieve a 3d model from a CAD software, read its geometric features and convert them into possible machining features. This information along with information from the database of stock materials, tools, machines, and tolerances, the system generates several feature interpretations, thus offering a more flexible manufacturing plan.
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Conference papers on the topic "3D model database"

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Lou, Kuiyang, Subramaniam Jayanti, Natraj Iyer, Yagnanarayanan Kalyanaraman, Sunil Prabhakar, and Karthik Ramani. "A Reconfigurable 3D Engineering Shape Search System: Part II — Database Indexing, Retrieval, and Clustering." In ASME 2003 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/detc2003/cie-48188.

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This paper introduces database and related techniques for a reconfigurable, intelligent 3D engineering shape search system, which retrieves similar 3D models based on their shape content. Feature vectors, which are numeric “fingerprints” of 3D models, and skeletal graphs, which are the “minimal representations of the shape content” of a 3D model, represent the shape content. The Euclidean distance of the feature vectors, as well as the distance between skeletal graphs, provides indirect measures of shape similarity between the 3D models. Critical database issues regarding 3D shape search systems are discussed: (a) database indexing, (b) semantic gap, (c) subjectivity of similarity, and (d) database clustering. An Rtree based multidimensional index is used to speed up the feature-vector based search operation, while a decision treebased approach is used for efficiently indexing/searching skeletal graphs. Interactions among users and the search system, such as relevance feedback and feature vector reconfiguration, are used to bridge the semantic gap and to customize the system for different users. Database clustering of the R-tree index is compared with that generated by a selforganizing map (SOM). Synthetic databases and real 3D model databases are employed to investigate the efficiency of the multidimensional index and the effectiveness of relevance feedback.
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Wei Zhou, Ning Liao, Zhibo Chen, and Weiping Li. "3D-HEVC visual quality assessment: Database and bitstream model." In 2016 Eighth International Conference on Quality of Multimedia Experience (QoMEX). IEEE, 2016. http://dx.doi.org/10.1109/qomex.2016.7498946.

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Ragno, Rino, and Alessio Ragno. "db.3d-qsar.com. The first 3D QSAR models database." In 2nd International Conference on Chemo and Bioinformatics. Institute for Information Technologies, University of Kragujevac, 2023. http://dx.doi.org/10.46793/iccbi23.051r.

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Field-Based Three-Dimensiona Quantitative Strucutere-Activity Relationships (FB 3D QSAR) comprise computational approaches used in drug design and molecular modeling to analyze the relationship between the three-dimensional structure of a list of molecules (described by molecular interaction fields) and their associated biological activities (BAs). It aims to understand how different structural features of the molecules contribute to enhancing or lowering the biological potency. The process of FB 3D QSAR involves several steps. First, a dataset of structurally diverse molecules with known BAs is selected. Then, their three-dimensional structures are generated using computational methods. Next, in the classical form of Cramer [1], sterical and electrostatic molecular interaction fields (MIFs) are calculated and as a final step a mathematical model is built through the correlation of BAs with MIFs by means of projection of latent structures (PLS) algorithm. With our interest in making 3D QSAR accessible to all as done with the www.3d-qsar.com [2] db.3d-qsar.com, the first publicly available database of 3D QSAR models, is presented in which the user can insert or draw a molecule and predict its potency against an available target. All the models available on db.3d-qsar.com have been heavily optimized in prediction power through a semi-systematic pretreatment and parameter selection procedure by initially dividing the datasets into training (80%) and prediction (20%) sets. Each published model was and will be prepared by a selection among thousands of alignment trials. The selected models were finally characterized using a validation set compiled with molecules taken from the ChEMBL database. At the time of writing more than 40 models associated to more than 30 different pharmacological targets have been prepared and are ready to be used. At the time of the presentation db.3d-qsar.com will be accessible to the public and during the presentation its features will be shown.
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Zhou, Xi, and Lin Cao. "3D model database reconstruction based on texture feature points detection." In 2013 6th International Congress on Image and Signal Processing (CISP). IEEE, 2013. http://dx.doi.org/10.1109/cisp.2013.6745257.

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Klank, Ulrich, Muhammad Zeeshan Zia, and Michael Beetz. "3D model selection from an internet database for robotic vision." In 2009 IEEE International Conference on Robotics and Automation (ICRA). IEEE, 2009. http://dx.doi.org/10.1109/robot.2009.5152488.

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Wang, Jiaxing, Wei Wang, Yong Yue, and Xiaohui Zhu. "3D Model Management and Dynamic Loading based on GIS Database." In 2022 International Conference on Algorithms, Data Mining, and Information Technology (ADMIT). IEEE, 2022. http://dx.doi.org/10.1109/admit57209.2022.00009.

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Kaneko, Kunihiko, Susumu Kuroki, and Akifumi Makinouchi. "DESIGN OF 3D CG DATA MODEL OF “MOVE” ANIMATION DATABASE SYSTEM." In Proceedings of the Second Far-East Workshop on Future Database Systems. WORLD SCIENTIFIC, 1992. http://dx.doi.org/10.1142/9789814503624_0042.

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Alessandri, Claudio, Marcello Balzani, Nicola Zaltron, and Federico Uccelli. "A 3D Laser Scanner Model as Virtual Database for Integrated Analyses." In 22nd International Symposium on Automation and Robotics in Construction. International Association for Automation and Robotics in Construction (IAARC), 2005. http://dx.doi.org/10.22260/isarc2005/0032.

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Watanuki, Tsutomu, and Nobuyoshi Yabuki. "Data Management Methods for a 3D Product Model in Graph Database." In Lean and Computing in Construction Congress - Joint Conference on Computing in Construction. Edinburgh: Heriot-Watt University, 2017. http://dx.doi.org/10.24928/jc3-2017/0025.

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Miller, Perry L., and James H. Oliver. "Extensible Architecture for Geometric-Model Database Translation." In ASME 2003 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/detc2003/cie-48235.

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This paper introduces an extensible software architecture for geometric model translation based on the concept of “interface” querying. Translation occurs by instantiating a “source” and a “target” module which are able to determine each other’s capabilities by querying for necessary interfaces. Data transfer is initiated between these uncoupled modules using a neutral protocol that they agree upon. This dynamic interoperation continues until the transfer of information is complete. Since it does not require conformance to any specific set of geometric functionality, the architecture accommodates evolving geometric formats. Communication between decoupled modules exclusively through software interfaces facilitates the intended extensibility. In support of ongoing virtual prototyping research at the Virtual Reality Applications Center (VRAC), an example implementation of the architecture in software is presented for conversion of 3D models from a proprietary large model visualization format, EDS/PLM DirectModel, into several alternative formats.
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Reports on the topic "3D model database"

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Al-Qadi, Imad, Aravind Ramakrishnan, Zehui Zhu, Izak Said, Greg Renshaw, Hasan Ozer, and Ramadan Salim. Optimized Hot-Mix Asphalt Lift Configuration for Performance. Illinois Center for Transportation, May 2023. http://dx.doi.org/10.36501/0197-9191/23-006.

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Researchers conducted eight large-scale laboratory tests to assess the combined impact of hot-mix asphalt (HMA) overlay mix and thickness on its performance to control reflective cracking. Bonding efficiency, flexibility, and stiffness of the HMA mix as well as overlay thickness significantly affect an overlay’s performance against reflective cracking. Researchers developed a generalized 3D finite-element model to predict an overlay’s reflective cracking potential and generated a database of 128 cases. They also developed a data-driven surrogate model to predict reflective cracking potential that engineers can easily use. Life-cycle cost analysis of overlay alternatives was performed using Illinois Department of Transportation’s unit prices from contracts between 2018 and 2019. The researchers identified optimal overlay configurations to control reflective cracking. An overlay composed of a 1.5 in (38.1 mm) SMA-9.5 or 1.25 in (31.8 mm) IL-9.5FG surface course and a 0.75 in (19.1 mm) IL-4.75 binder course had the lowest annual cost per mile among non-interstate projects. For interstate projects, an overlay composed of a 2 in (50.8 mm) SMA-12.5 surface course and a 2.25 in (57.2 mm) IL-19.0 binder course was the most cost-effective. The study concluded that to control reflective cracking and to reduce life-cycle cost, an overlay composed of an SMA-9.5 surface course and an IL-4.75 binder course is recommended for non-interstate projects. An IL-9.5FG surface course and an IL-4.75 binder course are suggested for low-volume and low-speed roads. For interstate projects, an overlay comprised of an SMA-12.5 surface course and an IL-19.0 binder course is recommended. A data-driven surrogate model may be used to design overlay thicknesses.
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Kingston, A. W., A. Mort, C. Deblonde, and O H Ardakani. Hydrogen sulfide (H2S) distribution in the Triassic Montney Formation of the Western Canadian Sedimentary Basin. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/329797.

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The Montney Formation is a highly productive hydrocarbon reservoir with significant reserves of hydrocarbon gases and liquids making it of great economic importance to Canada. However, high concentrations of hydrogen sulfide (H2S) have been encountered during exploration and development that have detrimental effects on environmental, health, and economics of production. H2S is a highly toxic and corrosive gas and therefore it is essential to understand the distribution of H2S within the basin in order to enhance identification of areas with a high risk of encountering elevated H2S concentrations in order to mitigate against potential negative impacts. Gas composition data from Montney wells is routinely collected by operators for submission to provincial regulators and is publicly available. We have combined data from Alberta (AB) and British Columbia (BC) to create a basin-wide database of Montney H2S concentrations. We then used an iterative quality control and quality assurance process to produce a dataset that best represents gas composition in reservoir fluids. This included: 1) designating gas source formation based on directional surveys using a newly developed basin-wide 3D model incorporating AGS's Montney model of Alberta with a model in BC, which removes errors associated with reported formations; 2) removed injection and disposal wells; 3) assessed wells with the 50 highest H2S concentrations to determine if gas composition data is accurate and reflective of reservoir fluid chemistry; and 4) evaluated spatially isolated extreme values to ensure data accuracy and prevent isolated highs from negatively impacting data interpolation. The resulting dataset was then used to calculate statistics for each x, y location to input into the interpolation process. Three interpolations were constructed based on the associated phase classification: H2S in gas, H2S in liquid (C7+), and aqueous H2S. We used Empirical Bayesian Kriging interpolation to generate H2S distribution maps along with a series of model uncertainty maps. These interpolations illustrate that H2S is heterogeneously distributed across the Montney basin. In general, higher concentrations are found in AB compared with BC with the highest concentrations in the Grande Prairie region along with several other isolated region in the southeastern portion of the basin. The interpolations of H2S associated with different phases show broad similarities. Future mapping research will focus on subdividing intra-Montney sub-members plus under- and overlying strata to further our understanding of the role migration plays in H2S distribution within the Montney basin.
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