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Dissertations / Theses on the topic '3D Shape Matching'

Author: Grafiati

Published: 4 June 2025

Last updated: 15 July 2025

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1

Tabia, Hedi. "Contributions to 3D-shape matching, retrieval and classification." Phd thesis, Université des Sciences et Technologie de Lille - Lille I, 2011. http://tel.archives-ouvertes.fr/tel-00818224.

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Une nouvelle approche pour la mise en correspondance des objets 3D en présence des transformations non-rigides et des modèles partiellement similaires est proposée dans le cadre de cette thèse. L'approche est composée de deux phases. Une première phase pour la description d'objets et une deuxième phase de mesure de similarité. Pour décrire un objet 3D, nous avons choisi une méthode basée sur des descripteurs locaux. La méthode consiste à extraire d'un objet 3D un ensemble de points caractéristiques pour lesquels deux descripteurs locaux sont calculés. Le premier descripteur Geodesic cord descr

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2

Rodolà, Emanuele <1984&gt. "Sparse and robust matching problem for 3D shape analysis." Doctoral thesis, Università Ca' Foscari Venezia, 2012. http://hdl.handle.net/10579/1233.

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In questa tesi affrontiamo diversi aspetti del dilagante problema della corrispondenza nella Visione Artificiale. I nostri risultati principali traggono vantaggio da sviluppi recenti nel campo emergente dei metodi basati sulla Teoria dei Giochi in Machine Learning e Pattern Recognition, che adattiamo in un framework più generale. Tale framework è sufficientemente flessibile da gestire problemi di corrispondenza piuttosto specifici che comunemente si incontrano nelle aree della ricostruzione tridimensionale e di shape analysis. Il nostro metodo viene applicato a diversi scenari e altrettanti do

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3

Sipiran, Mendoza Iván Anselmo. "Local features for shape matching and retrieval." Tesis, Universidad de Chile, 2014. http://www.repositorio.uchile.cl/handle/2250/115564.

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Los modelos tridimensionales son útiles para representar objetos reales en el mundo digital. Su uso se encuentra en muchas aplicaciones tales como medicina, ingeniería, seguridad y otros. Recientemente, la introducción de dispositivos de captura baratos ha incrementado el interés por este tipo de información, generando una gran cantidad de modelos disponibles en diferentes lugares. Por lo tanto, es imperativo proveer algorithmos efectivos y eficientes para procesar y analizar datos 3D. La evaluación de similitud de modelos 3D es una tarea importante que puede ser útil para procesos de alto ni

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4

Liu, Chi Hin. "Structured lighting 3D reconstruction and 3D shape matching of human model for garment industries /." View abstract or full-text, 2006. http://library.ust.hk/cgi/db/thesis.pl?MECH%202006%20LIUC.

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5

Mellado, Nicolas. "Analysis of 3D objects at multiple scales : application to shape matching." Thesis, Bordeaux 1, 2012. http://www.theses.fr/2012BOR14685/document.

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Depuis quelques années, l’évolution des techniques d’acquisition a entraîné une généralisation de l’utilisation d’objets 3D très dense, représentés par des nuages de points de plusieurs millions de sommets. Au vu de la complexité de ces données, il est souvent nécessaire de les analyser pour en extraire les structures les plus pertinentes, potentiellement définies à plusieurs échelles. Parmi les nombreuses méthodes traditionnellement utilisées pour analyser des signaux numériques, l’analyse dite scale-space est aujourd’hui un standard pour l’étude des courbes et des images. Cependant, son adap

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6

Mian, Ajmal Saeed. "Representations and matching techniques for 3D free-form object and face recognition." University of Western Australia. School of Computer Science and Software Engineering, 2007. http://theses.library.uwa.edu.au/adt-WU2007.0046.

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[Truncated abstract] The aim of visual recognition is to identify objects in a scene and estimate their pose. Object recognition from 2D images is sensitive to illumination, pose, clutter and occlusions. Object recognition from range data on the other hand does not suffer from these limitations. An important paradigm of recognition is model-based whereby 3D models of objects are constructed offline and saved in a database, using a suitable representation. During online recognition, a similar representation of a scene is matched with the database for recognizing objects present in the scene . .

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7

Sundararaman, Ramana. "Analysis of large scale 3D shape collection with learning based approaches." Electronic Thesis or Diss., Institut polytechnique de Paris, 2025. http://www.theses.fr/2025IPPAX023.

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La robotique, l’imagerie médicale et la conception numérique s’appuient de plus en plus sur l’analyse de formes 3D pour des tâches comme la correspondance, la reconstruction et la modélisation générative. Alors que l’optimisation géométrique dominait autrefois, l’essor de l’apprentissage profond a réorienté l’intérêt vers l’extraction de caractéristiques guidée par les données. Pourtant, les méthodes actuelles restent limitées par leur dépendance aux données supervisées, leur sensibilité au bruit et leur généralisation limitée entre différentes catégories de formes.Cette thèse propose des solu

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8

Naffouti, Seif Eddine. "Reconnaissance et correspondance de formes 3D pour des systèmes intelligents de vision par ordinateur." Thesis, Bourgogne Franche-Comté, 2018. http://www.theses.fr/2018UBFCK033/document.

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Cette thèse porte sur la reconnaissance et l’appariement de formes 3D pour des systèmes intelligents de vision par ordinateur. Elle décrit deux contributions principales à ce domaine. La première contribution est une implémentation d'un nouveau descripteur de formes construit à la base de la géométrie spectrale de l'opérateur de Laplace-Beltrami ; nous proposons une signature de point globale avancée (AGPS). Ce descripteur exploite la structure intrinsèque de l'objet et organise ses informations de manière efficace. De plus, AGPS est extrêmement compact puisque seulement quelques paires propre

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9

Deák, Jaromír. "Registrace fotografií do 3D modelu terénu." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2017. http://www.nusl.cz/ntk/nusl-363795.

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This work refers existing solutions and options for the task registration of photos to 3D model based on the previous knowledge of the geographic position of the camera. The contribution of the work are new ways and possibilities of the solution with the usage of graph algorithms. In this area, the work interests are useful points of interest detection in input data, a construction of graphs and graph matching possibilities.

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10

Baruzzi, Francesco. "Object detection in robot picking applications using 3d cameras." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/22594/.

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This work relies on analysis and testing of two 3D cameras in robot picking applications. Continuous progress in microelectronics, micro optics and micro technology made 3D cameras affordable and competitive with respect to 2D cameras in common industrial and commercial applications. 3D cameras, in fact, could give advantages in terms of timing and performances in application involving objects normally processed with 2D cameras. These cameras are intrinsically different in the technology used and provide mono/color images, depth maps and point clouds. First camera considered, Intel RealSense D

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11

Corman, Etienne. "Functional representation of deformable surfaces for geometry processing." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLX075/document.

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La création et la compréhension des déformations de surfaces sont des thèmes récurrent pour le traitement de géométrie 3D. Comme les surfaces lisses peuvent être représentées de multiples façon allant du nuage de points aux maillages polygonales, un enjeu important est de pouvoir comparer ou déformer des formes discrètes indépendamment de leur représentation. Une réponse possible est de choisir une représentation flexible des surfaces déformables qui peut facilement être transportées d'une structure de données à une autre.Dans ce but, les "functional map" proposent de représenter des applica

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12

Re, Cristina. "THREE-DIMENSIONAL RECONSTRUCTION OF PLANETARY SURFACES FROM STEREO SATELLITE IMAGES." Doctoral thesis, Università degli studi di Padova, 2014. http://hdl.handle.net/11577/3424553.

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The dissertation is related to the work of the team involved in the development of a STereo Camera (STC) for the ESA-JAXA mission BepiColombo to Mercury (Cremonese et al, 2009) and is focused on validation of the STC 3D reconstruction process and software development for DTM generation. STC will provide the images for the global mapping in stereo mode of the entire Hermean surface. In order to estimate and characterize the actual stereo reconstruction capabilities of STC, an indoor Stereo Validation Setup (SVS) has been developed and tested in laboratory with a functional breadboard. The ste

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13

Li, Yong. "Contour Based 3D Biological Image Reconstruction and Partial Retrieval." Digital Archive @ GSU, 2007. http://digitalarchive.gsu.edu/cs_diss/29.

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Image segmentation is one of the most difficult tasks in image processing. Segmentation algorithms are generally based on searching a region where pixels share similar gray level intensity and satisfy a set of defined criteria. However, the segmented region cannot be used directly for partial image retrieval. In this dissertation, a Contour Based Image Structure (CBIS) model is introduced. In this model, images are divided into several objects defined by their bounding contours. The bounding contour structure allows individual object extraction, and partial object matching and retrieval from a

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14

Sharma, Avinash. "Représentation et enregistrement de formes visuelles 3D à l'aide de Laplacien graphe et noyau de la chaleur." Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00860533.

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Analyse de la forme 3D est un sujet de recherche extrêmement actif dans les deux l'infographie et vision par ordinateur. Dans la vision par ordinateur, l'acquisition de formes et de modélisation 3D sont généralement le résultat du traitement des données complexes et des méthodes d'analyse de données. Il existe de nombreuses situations concrètes où une forme visuelle est modélisé par un nuage de points observés avec une variété de capteurs 2D et 3D. Contrairement aux données graphiques, les données sensorielles ne sont pas, dans le cas général, uniformément répartie sur toute la surface des obj

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15

Stella, Federico. "Learning a Local Reference Frame for Point Clouds using Spherical CNNs." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/20197/.

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Uno dei problemi più importanti della 3D Computer Vision è il cosiddetto surface matching, che consiste nel trovare corrispondenze tra oggetti tridimensionali. Attualmente il problema viene affrontato calcolando delle feature locali e compatte, chiamate descrittori, che devono essere riconosciute e messe in corrispondenza al mutare della posa dell'oggetto nello spazio, e devono quindi essere invarianti rispetto all'orientazione. Il metodo più usato per ottenere questa proprietà consiste nell'utilizzare dei Local Reference Frame (LRF): sistemi di coordinate locali che forniscono un'orientazione

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16

Xiao, Pengdong. "3D shape matching and registration : a probabilistic perspective." Phd thesis, 2010. http://hdl.handle.net/1885/151528.

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Dense correspondence is a key area in computer vision and medical image analysis. It has applications in registration and shape analysis. In this thesis, we develop a technique to recover dense correspondences between the surfaces of neuroanatomical objects over heterogeneous populations of individuals. We recover dense correspondences based on 3D shape matching. In this thesis, the 3D shape matching problem is formulated under the framework of Markov Random Fields (MRFs). We represent the surfaces of neuroanatomical objects as genus zero voxel-based meshes. The surface meshes are projecte

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17

Jang, Stanley. "3D interaction studies using the shape-matching paradigm." Thesis, 1992. http://hdl.handle.net/2429/3059.

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At one time, 3D computer applications were only available on very specialized and very expensive workstations. However, technology on typical desktop computers has improved dramatically over the last decade, and is now capable of 3D graphics. If shrewd choices are made concerning the graphics hardware and software, a reasonably priced desktop computer will allow adequate real-time interaction for many applications. This thesis investigates some of these choices using a generalized program written to serve as an expandable testbed for evaluating some of the factors affecting user interactio

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18

Hsu, Jim-Fa, and 許錦發. "Shape Matching and Recognition of 3D Object Using Potential Fields." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/43286493743328608812.

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碩士<br>國立交通大學<br>資訊科學學系<br>86<br>The goal of this thesis is to investigate the shape matching and recognition of 3D objects using artificial potential fields. The potential-based approach recognizes the shape of a 3D object by identifying the best match from a selected group of template objects. The proposed model assumes that boundary of every 3D template object is uniformly charged. An initially small input object, represented by its boundary samples, placed inside a template obj

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19

Xu, Jin-Fa, and 許錦發. "Shape Matching and Recognition of 3D Object Using Potential Fields." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/29820872019646199690.

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20

Chang, Chih-Chieh, and 張智傑. "A Topological-based and Geometric-based 3D Shape Matching Approach." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/64555358138054059470.

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碩士<br>國立成功大學<br>資訊工程學系碩博士班<br>97<br>Shape matching is a fundamental and important research issue with many applications in computer graphics and visualization. In this paper, we introduce a novel approach for matching 3D polygonal models. Based on the integration of global topological and local geometric features in a shape descriptor, our approach can accurately match 3D models. The method first extracts the skeleton-graphs (a topological descriptor) from the polygon models using a mesh contraction operation. The vertex skeleton correspondence between 3D model and the skeleton graph is also g

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21

Yang, Hui-Guo, and 楊惠國. "Shape Matching of 3D Objects with Partial Surface Using Potential Fields." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/92474832915290668676.

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22

Lin, Wei-Yang. "Robust geometrically invariant features for 2D shape matching and 3D face recognition." 2006. http://www.library.wisc.edu/databases/connect/dissertations.html.

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23

Payet, Nadia. "From shape-based object recognition and discovery to 3D scene interpretation." Thesis, 2011. http://hdl.handle.net/1957/21316.

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This dissertation addresses a number of inter-related and fundamental problems in computer vision. Specifically, we address object discovery, recognition, segmentation, and 3D pose estimation in images, as well as 3D scene reconstruction and scene interpretation. The key ideas behind our approaches include using shape as a basic object feature, and using structured prediction modeling paradigms for representing objects and scenes. In this work, we make a number of new contributions both in computer vision and machine learning. We address the vision problems of shape matching, shape-based minin

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24

Li, Jun-Chiu, and 李閏秋. "Shape Matching of Partial 3D Point Cloud of a Vehicle Using Artificial Potential Fields." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/72400650666103445206.

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碩士<br>國立交通大學<br>資訊學院資訊學程<br>101<br>In this thesis, the artificial potential field is used as the foundation for matching point cloud with 3D vehicular shapes. An initially small input object (point cloud) is placed inside shape models will experience repulsive force and torque arising from the potential field. A better match in shape between the shape model and the input object can be obtained if the input object translates and reorients itself to reduce the potential while growing in size. The shape model which allows the maximum growth of the input object corresponds to the best match and th

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25

Taati, BABAK. "Generation and Optimization of Local Shape Descriptors for Point Matching in 3-D Surfaces." Thesis, 2009. http://hdl.handle.net/1974/5107.

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We formulate Local Shape Descriptor selection for model-based object recognition in range data as an optimization problem and offer a platform that facilitates a solution. The goal of object recognition is to identify and localize objects of interest in an image. Recognition is often performed in three phases: point matching, where correspondences are established between points on the 3-D surfaces of the models and the range image; hypothesis generation, where rough alignments are found between the image and the visible models; and pose refinement, where the accuracy of the initial alignments

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26

Liu, Cheng Hsiung, and 劉政雄. "RECOGNITION OF 3D OBJECTS BY SINGLE CAMERA VIEWS USING CAMERA CALIBRATION, SURFACE BACKPROJECTION, AND 2D MODEL MATCHING TECHNIQUES BASED ON OBJECT SHAPE AND SURFACE PATTERN INFORMATION." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/99374905602646662157.

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博士<br>國立交通大學<br>資訊工程研究所<br>81<br>A new approach to recognition of three different classes of 3D objects by single camera views using a combination of camera calibration, surface backprojection, and 2D model matching techniques are proposed. The three classes of 3D objects are cuboids, cylinders, and regular prisms, which are commonly seen in commercial products and industrial parts. Not only the silhouette shape but also the surface pattern of the object are utilized in the recognition sche

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