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Dissertations / Theses on the topic '3D Depth Model'

Author: Grafiati

Published: 1 April 2023

Last updated: 31 July 2025

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1

Sexton, Paul. "3D velocity-depth model building using surface seismic and well data." Thesis, Durham University, 1998. http://etheses.dur.ac.uk/4824/.

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The objective of this work was to develop techniques that could be used to rapidly build a three-dimensional velocity-depth model of the subsurface, using the widest possible variety of data available from conventional seismic processing and allowing for moderate structural complexity. The result is a fully implemented inversion methodology that has been applied successfully to a large number of diverse case studies. A model-based inversion technique is presented and shown to be significantly more accurate than the analytical methods of velocity determination that dominate industrial practice.

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2

DAL, CIN MICHELA. "3D velocity depth model in the Gulf of Trieste by means of tomographic analysis from multichannel seismic reflection data." Doctoral thesis, Università degli Studi di Trieste, 2018. http://hdl.handle.net/11368/2922569.

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The Gulf of Trieste (GT) is a shallow epicontinental basin that is part of the northern Adriatic Sea (Central Mediterranean). It is settled at the proximal southern edge of an active plate boundary, where the convergence between the Adriatic block and the Eurasian plate gave rise to two Meso-Cenozoic Alpine-Himalayan orogens: the Dinarides (NW-SE trending) and the Eastern Alps (E-W oriented). The Gulf of Trieste is the foredeep of the northern External Dinarides and the eastern Alps. Its evolution started from a Mesozoic rifting that generated NE-SW normal faults allowing the aggradation of th

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BIAGIOLI, ELISA. "Depth-averaged and 3D Finite Volume numerical models for viscous fluids, with application to the simulation of lava flows." Doctoral thesis, Università degli studi di Genova, 2021. http://hdl.handle.net/11567/1057651.

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This Ph.D. project was initially born from the motivation to contribute to the depth-averaged and 3D modeling of lava flows. Still, we can frame the work done in a broader and more generalist vision. We developed two models that may be used for generic viscous fluids, and we applied efficient numerical schemes for both cases, as explained in the following. The new solvers simulate free-surface viscous fluids whose temperature changes are due to radiative, convective, and conductive heat exchanges. A temperature-dependent viscoplastic model is used for the final application to lava flows. Bo

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4

Buat, Benjamin. "Caméra active 3D par Depth from Defocus pour l'inspection de surface : algorithmie, modèle de performance et réalisation expérimentale." Electronic Thesis or Diss., université Paris-Saclay, 2022. http://www.theses.fr/2022UPASG058.

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Cette thèse traite de la conception d'une caméra 3D capable de produire la carte de profondeur complète d'une scène dans le cadre de l'inspection de surface. Ce domaine d'application implique généralement des objets peu texturés et un cahier des charges stricte concernant la compacité du système d'inspection et la précision requise. Dans cette thèse, nous proposons d'utiliser une caméra associée à un projecteur permettant d'ajouter une texture artificielle à la scène. L'extraction de 3D repose sur le principe de « Depth-From-Defocus » (DFD) qui consiste à estimer la profondeur en exploitant le

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5

Sankoh, Hiroshi. "Object Extraction for Virtual-viewpoint Video Synthesis." 京都大学 (Kyoto University), 2015. http://hdl.handle.net/2433/200465.

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6

Hua, Xiaoben, and Yuxia Yang. "A Fusion Model For Enhancement of Range Images." Thesis, Blekinge Tekniska Högskola, Sektionen för ingenjörsvetenskap, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-2203.

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In this thesis, we would like to present a new way to enhance the “depth map” image which is called as the fusion of depth images. The goal of our thesis is to try to enhance the “depth images” through a fusion of different classification methods. For that, we will use three similar but different methodologies, the Graph-Cut, Super-Pixel and Principal Component Analysis algorithms to solve the enhancement and output of our result. After that, we will compare the effect of the enhancement of our result with the original depth images. This result indicates the effectiveness of our methodology.<b

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7

Diskin, Yakov. "Dense 3D Point Cloud Representation of a Scene Using Uncalibrated Monocular Vision." University of Dayton / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1366386933.

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8

Stålberg, Martin. "Reconstruction of trees from 3D point clouds." Thesis, Uppsala universitet, Avdelningen för systemteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-316833.

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The geometrical structure of a tree can consist of thousands, even millions, of branches, twigs and leaves in complex arrangements. The structure contains a lot of useful information and can be used for example to assess a tree's health or calculate parameters such as total wood volume or branch size distribution. Because of the complexity, capturing the structure of an entire tree used to be nearly impossible, but the increased availability and quality of particularly digital cameras and Light Detection and Ranging (LIDAR) instruments is making it increasingly possible. A set of digital image

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9

Grankvist, Ola. "Recognition and Registration of 3D Models in Depth Sensor Data." Thesis, Linköpings universitet, Datorseende, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-131452.

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Object Recognition is the art of localizing predefined objects in image sensor data. In this thesis a depth sensor was used which has the benefit that the 3D pose of the object can be estimated. This has applications in e.g. automatic manufacturing, where a robot picks up parts or tools with a robot arm. This master thesis presents an implementation and an evaluation of a system for object recognition of 3D models in depth sensor data. The system uses several depth images rendered from a 3D model and describes their characteristics using so-called feature descriptors. These are then matched wi

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10

Semmens, Stephen Bradley. "An Engineering Geological Investigation of the Seismic Subsoil Classes in the Central Wellington Commercial Area." Thesis, University of Canterbury. Geological Sciences, 2010. http://hdl.handle.net/10092/4287.

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The city of Wellington has a high population concentration and lies within a geologically active landscape at the southern end of the North Island, New Zealand. Wellington has a high seismic risk due to its close proximity to several major fault systems, with the active Wellington Fault located in the north-western central city. Varying soil depth and properties in combination with the close proximity of active faults mean that in a large earthquake rupture event, ground shaking amplification is expected to occur in Thorndon, Te Aro and around the waterfront. This thesis focuses on the area b

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11

Hasnat, Md Abul. "Unsupervised 3D image clustering and extension to joint color and depth segmentation." Thesis, Saint-Etienne, 2014. http://www.theses.fr/2014STET4013/document.

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L'accès aux séquences d'images 3D s'est aujourd'hui démocratisé, grâce aux récentes avancées dans le développement des capteurs de profondeur ainsi que des méthodes permettant de manipuler des informations 3D à partir d'images 2D. De ce fait, il y a une attente importante de la part de la communauté scientifique de la vision par ordinateur dans l'intégration de l'information 3D. En effet, des travaux de recherche ont montré que les performances de certaines applications pouvaient être améliorées en intégrant l'information 3D. Cependant, il reste des problèmes à résoudre pour l'analyse et la se

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12

Nosjean, Nicolas. "Management et intégration des risques et incertitudes pour le calcul de volumes de roches et de fluides au sein d’un réservoir, zoom sur quelques techniques clés d’exploration Integrated Post-stack Acoustic Inversion Case Study to Enhance Geological Model Description of Upper Ordovicien Statics : from imaging to interpretation pitfalls and an efficient way to overcome them Improving Upper Ordovician reservoir characterization - an Algerian case study Tracking Fracture Corridors in Tight Gas Reservoirs : An Algerian Case Study Integrated sedimentological case study of glacial Ordovician reservoirs in the Illizi Basin, Algeria A Case Study of a New Time-Depth Conversion Workflow Designed for Optimizing Recovery Proper Systemic Knowledge of Reservoir Volume Uncertainties in Depth Conversion Integration of Fault Location Uncertainty in Time to Depth Conversion Emergence of edge scenarios in uncertainty studies for reservoir trap analysis Enhancing geological model with the use of Spectral Decomposition - A case study of a prolific stratigraphic play in North Viking Graben, Norway Fracture corridor identification through 3D multifocusing to improve well deliverability, an Algerian tight reservoir case study Geological Probability Of Success Assessment for Amplitude-Driven Prospects, A Nile Delta Case Study." Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASS085.

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En tant que géoscientifique dans le domaine de l’Exploration pétrolière et gazière depuis une vingtaine d’années, mes fonctions professionnelles m’ont permis d’effectuer différents travaux de recherche sur la thématique de la gestion des risques et des incertitudes. Ces travaux de recherche se situent sur l’ensemble de la chaîne d’analyse Exploration, traitant de problématiques liées à l’acquisition et au traitement sismique, jusqu’au placement optimal de forages d’exploration. Un volet plus poussé de mes travaux s’est orienté sur la gestion des incertitudes géophysiques en Exploration pétroli

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13

Yeh, Yen-Ting, and 葉彥廷. "On Generating Vehicle Surrounding Images Based on Depth-Adaptive 3D Model." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/43490970816309709013.

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碩士<br>國立臺灣大學<br>資訊網路與多媒體研究所<br>102<br>Driving assistance systems help drivers to avoid car accidents by provid-ing warning signals or visual cues of surrounding situations. Instead of the fixed bird’s-eye view monitoring proposed in many previous works, we de-veloped a real-time vehicle surrounding monitoring system, ”Angel Eye”, that can assist drivers to perceive the vehicle surrounding situations more easily. In our system, four fisheye cameras are mounted around a vehicle. To inte-grate these four fisheye camera views, we firstly use fisheye camera calibra-tion method to dewarp the capture

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14

Lin, Ping-hsien, and 林秉賢. "3D Model Retrieval Based on Projection Depth Maps and Moment Invariants." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/93475608681812372590.

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碩士<br>國立臺南大學<br>數位學習科技學系碩士班<br>98<br>In this study, we purpose a new content-based approach to retrieving 3D models from a database, based on projection depth maps and moment invariants. Our system can be divided into offline and online stages. In the offline stage, the location and size of each model is normalized first. For each normalized model and its circumscribed dodecahedron, sixty projection depth maps are obtained at the twenty vertices and with three directions. Afterward, 2D and 3D moment invariants are computed for each map and constitute two feature vectors respectively. In the on

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15

HUNG, CHIEN-YU, and 洪千喻. "Using Handheld Depth Sensor for 3D Model Reconstruction and Augmented Reality Application." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/m2fvhr.

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碩士<br>國立臺北大學<br>不動產與城鄉環境學系<br>107<br>In recent years, 3D modeling technology has developed rapidly, and the application has become increasingly diverse, such as virtual reality and augment reality. While the acquisition of 3d information, such as the passive sensing of photogrammetry and multi-angle image modeling based on computer vision, and the active sensing of LiDAR etc., have their own advantages and disadvantages, like the modeling of passive sensing is difficult in the area with insufficient feature points, and the high-precision active sensing instrument is expensive. This study uses

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16

Yeh, Ming-han, and 葉名翰. "Efficient 3D Video Coding for Depth Image Using D-NOSE Model-based Optimal Modification." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/9hx67r.

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碩士<br>國立臺灣科技大學<br>資訊工程系<br>100<br>Depth distortions caused by depth video coding which is required for storage and transmission considerations may cause geometry changes in view synthesis. However, for the depth value of each pixel, there exists a range within which no geometry changes will be observed. We propose an efficient 3D video coding which, for each pixel in the macroblock, modifies, without inducing any geometry change, the depth value to minimize the residual. Experiment results show that the proposed method substantially reduces the bitrate while preserving the quality of the rende

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17

Liu, Han-wen, and 劉瀚文. "2D-to-3D Conversion for a Single Image Based on Background Depth Model Estimation." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/18242030438995254678.

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18

Chatterjee, Avishek. "Geometric Calibration and Shape Refinement for 3D Reconstruction." Thesis, 2015. https://etd.iisc.ac.in/handle/2005/4546.

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This thesis is a contribution towards the methods of 3D reconstruction in computer vision. Most of the 3D reconstruction methods are based on either the principle of triangulation or the principle of photometry. In this thesis, we investigate both of these approaches. Although, fundamentals of these principles are well known in computer vision, the recent availability of new hardware and easy access to the community photo collections have made it possible to investigate some of these methods in a newer context. This is because, the existing methods of 3D reconstruction are required to be m

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19

Nguyen, Trong Nguyen. "Analysis of 3D human gait reconstructed with a depth camera and mirrors." Thèse, 2019. http://hdl.handle.net/1866/23439.

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L'évaluation de la démarche humaine est l'une des composantes essentielles dans les soins de santé. Les systèmes à base de marqueurs avec plusieurs caméras sont largement utilisés pour faire cette analyse. Cependant, ces systèmes nécessitent généralement des équipements spécifiques à prix élevé et/ou des moyens de calcul intensif. Afin de réduire le coût de ces dispositifs, nous nous concentrons sur un système d'analyse de la marche qui utilise une seule caméra de profondeur. Le principe de notre travail est similaire aux systèmes multi-caméras, mais l'ensemble de caméras est remplacé par un s

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20

Su, Che-Chun. "Applied statistical modeling of three-dimensional natural scene data." Thesis, 2014. http://hdl.handle.net/2152/24878.

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Natural scene statistics (NSS) have played an increasingly important role in both our understanding of the function and evolution of the human vision system, and in the development of modern image processing applications. Because depth/range, i.e., egocentric distance, is arguably the most important thing a visual system must compute (from an evolutionary perspective), the joint statistics between natural image and depth/range information are of particular interest. However, while there exist regular and reliable statistical models of two-dimensional (2D) natural images, there has been little

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21

Hu, Shang-Jen, and 胡尚仁. "Controlling depth perception for rendering stereoscopic 3D models." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/46338257466247793428.

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碩士<br>國立臺灣科技大學<br>色彩與照明科技研究所<br>101<br>Recently, the development of the stereo display technology progresses fast. However, less three-dimensional software provides quality stereoscopic render. In using this kind of software, users sometimes have discomfort experience when viewing stereoscopic 3D models. So, producing quality stereoscopic 3D technology becomes an important issue. Usually, user adjusts the camera position by him or herself when viewing stereoscopic models. Amateur will provoke eye fatigue and feel uncomfortable under improper camera parameters. Therefore, we test the effect of

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22

Vitale, Andrea. "Multiscale inversion of potential fields: from 1D to 3D depth-weighted models." Tesi di dottorato, 2019. http://www.fedoa.unina.it/12726/1/vitale_andrea_31.pdf.

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We developed two different approaches of inversion of potential fields: - A method for 1D inversion of potential fields. - A method for 2D and 3D self-constrained depth weighted inversion of inhomogeneous potential fields. Both methods are based on a multiscale approach, that is they involve use of data at different scales or altitudes. These particular approaches bring some benefits.

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23

Leite, Inês de Sousa Caldas Rodrigues. "Recognition and 6 DoF Pose Estimation of 3D Models in Depth Sensor Data." Master's thesis, 2018. https://repositorio-aberto.up.pt/handle/10216/116531.

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24

Leite, Inês de Sousa Caldas Rodrigues. "Recognition and 6 DoF Pose Estimation of 3D Models in Depth Sensor Data." Dissertação, 2018. https://repositorio-aberto.up.pt/handle/10216/116531.

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25

Pattani, Varun Paresh. "Understanding cell death response to gold nanoparticle-mediated photothermal therapy in 2D and 3D in vitro tumor models for improving cancer therapy." 2013. http://hdl.handle.net/2152/23106.

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Gold nanoparticles, a class of plasmonic nanoparticle, have increasingly been explored as an imaging and therapeutic agent to treat cancer due to their characteristic surface plasmon resonance phenomenon and penchant for tumor accumulation. Photothermal therapy has been shown as a promising cancer treatment by delivering heat specifically to the tumor site via gold nanoparticles. In this study, we demonstrate that gold nanorod (GNR)-mediated photothermal therapy can be more effective through the understanding of cell death mechanisms. By targeting GNRs to various cellular localizations, we exp

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26

Villa, C., Jo Buckberry, C. Cattaneo, B. Frohlich, and N. Lynnerup. "Quantitative analysis of the morphological changes of the pubic symphyseal face and the auricular surface and implications for age at death estimation." 2015. http://hdl.handle.net/10454/7176.

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Yes<br>Age estimation methods are often based on the age-related morphological changes of the auricular surface and the pubic bone. In this study, a mathematical approach to quantify these changes has been tested analyzing the curvature variation on 3D models from CT and laser scans. The sample consisted of the 24 Suchey–Brooks (SB) pubic bone casts, 19 auricular surfaces from the Buckberry and Chamberlain (BC) “recording kit” and 98 pelvic bones from the Terry Collection (Smithsonian Institution). Strong and moderate correlations between phases and curvature were found in SB casts (ρ 0.60–0.9

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