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Research On Registration Of 3 D Geometric Features And An Automated Inspection System Integrating Cmm And Solid Modelling Systems
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Book Synopsis Research on Registration of 3-D Geometric Features and an Automated Inspection System Integrating CMM and Solid Modelling Systems by : Ergin Duran
Download or read book Research on Registration of 3-D Geometric Features and an Automated Inspection System Integrating CMM and Solid Modelling Systems written by Ergin Duran and published by . This book was released on 1996 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Incorporating Geometric Tolerance Information in Solid Models to Build Automated Inspection System by :
Download or read book Incorporating Geometric Tolerance Information in Solid Models to Build Automated Inspection System written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A major shortcoming of the current solid modeling schemes is their inability to store tolerance information. Lack of tolerance information makes it almost impossible to integrate computer-aided inspection with other modules of computer integrated manufacturing systems. If geometric tolerance information can be incorporated in CAD data structures, it will play a key role in the overall integration that the modern manufacturing industry is starving for. The current work is an attempt to make further inroads in this relatively new arena. A comprehensive tolerance information capturing system is proposed in this project. This system stores tolerance zone information in parametric form. It is mathematical, compact and compatible with current solid model data structures. An automated inspection system is developed that uses this stored information to verify actual feature conformance with the specified tolerance. Variational geometric models and space data transformations are central to this system. New concepts such as datum adjusted nominal feature and sequential tolerance verification algorithm are introduced. The system also has one component that checks for inconsistencies in tolerance specifications in the design stage. Overall, the system can perform many tasks in the inspection process for which currently human expert is required.
Book Synopsis Proceedings of the ... ASME Design Engineering Technical Conferences by :
Download or read book Proceedings of the ... ASME Design Engineering Technical Conferences written by and published by . This book was released on 2006 with total page 716 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Representations and Techniques for 3D Object Recognition and Scene Interpretation by : Derek Hoiem
Download or read book Representations and Techniques for 3D Object Recognition and Scene Interpretation written by Derek Hoiem and published by Morgan & Claypool Publishers. This book was released on 2011-09-09 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the grand challenges of artificial intelligence is to enable computers to interpret 3D scenes and objects from imagery. This book organizes and introduces major concepts in 3D scene and object representation and inference from still images, with a focus on recent efforts to fuse models of geometry and perspective with statistical machine learning. The book is organized into three sections: (1) Interpretation of Physical Space; (2) Recognition of 3D Objects; and (3) Integrated 3D Scene Interpretation. The first discusses representations of spatial layout and techniques to interpret physical scenes from images. The second section introduces representations for 3D object categories that account for the intrinsically 3D nature of objects and provide robustness to change in viewpoints. The third section discusses strategies to unite inference of scene geometry and object pose and identity into a coherent scene interpretation. Each section broadly surveys important ideas from cognitive science and artificial intelligence research, organizes and discusses key concepts and techniques from recent work in computer vision, and describes a few sample approaches in detail. Newcomers to computer vision will benefit from introductions to basic concepts, such as single-view geometry and image classification, while experts and novices alike may find inspiration from the book's organization and discussion of the most recent ideas in 3D scene understanding and 3D object recognition. Specific topics include: mathematics of perspective geometry; visual elements of the physical scene, structural 3D scene representations; techniques and features for image and region categorization; historical perspective, computational models, and datasets and machine learning techniques for 3D object recognition; inferences of geometrical attributes of objects, such as size and pose; and probabilistic and feature-passing approaches for contextual reasoning about 3D objects and scenes. Table of Contents: Background on 3D Scene Models / Single-view Geometry / Modeling the Physical Scene / Categorizing Images and Regions / Examples of 3D Scene Interpretation / Background on 3D Recognition / Modeling 3D Objects / Recognizing and Understanding 3D Objects / Examples of 2D 1/2 Layout Models / Reasoning about Objects and Scenes / Cascades of Classifiers / Conclusion and Future Directions
Author :General Motors Corporation. Research Laboratories. Computer Science Department Publisher : ISBN 13 : Total Pages :18 pages Book Rating :4.:/5 (123 download)
Book Synopsis A Method for Registration of 3-D Shapes by : General Motors Corporation. Research Laboratories. Computer Science Department
Download or read book A Method for Registration of 3-D Shapes written by General Motors Corporation. Research Laboratories. Computer Science Department and published by . This book was released on 1991 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper describes a general-purpose, representation-independent method for the accurate and computationally efficient registration of 3-D shapes including free-form curves and surfaces. The method handles the full six degrees of freedom and is based on the iterative closest point (ICP) algorithm, which requires only a procedure to find the closest point on a geometric entity to a given point. The ICP algorithm always converges monotonically to the nearest local minimum of a mean-square distance metric, and the rate of convergence is rapid during the first few iterations. Therefore, given an adequate set of initial rotations and translations for a particular class of objects with a certain level of 'shape complexity', one can globally minimize the mean-square distance metric over all six degrees of freedom by testing each initial registration. One important application of this method is to register sensed data from unfixtured rigid objects with an ideal geometric model, prior to shape inspection. Experimental results show the capabilities of the registration algorithm on point sets, curves, and surfaces.
Book Synopsis Automatic Reconstruction of Textured 3D Models by : Pitzer, Benjamin
Download or read book Automatic Reconstruction of Textured 3D Models written by Pitzer, Benjamin and published by KIT Scientific Publishing. This book was released on 2015-03-23 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: Three dimensional modeling and visualization of environments is an increasingly important problem. This work addresses the problem of automatic 3D reconstruction and we present a system for unsupervised reconstruction of textured 3D models in the context of modeling indoor environments. We present solutions to all aspects of the modeling process and an integrated system for the automatic creation of large scale 3D models.
Download or read book 3D Shape Analysis written by Hamid Laga and published by John Wiley & Sons. This book was released on 2018-12-14 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: An in-depth description of the state-of-the-art of 3D shape analysis techniques and their applications This book discusses the different topics that come under the title of "3D shape analysis". It covers the theoretical foundations and the major solutions that have been presented in the literature. It also establishes links between solutions proposed by different communities that studied 3D shape, such as mathematics and statistics, medical imaging, computer vision, and computer graphics. The first part of 3D Shape Analysis: Fundamentals, Theory, and Applications provides a review of the background concepts such as methods for the acquisition and representation of 3D geometries, and the fundamentals of geometry and topology. It specifically covers stereo matching, structured light, and intrinsic vs. extrinsic properties of shape. Parts 2 and 3 present a range of mathematical and algorithmic tools (which are used for e.g., global descriptors, keypoint detectors, local feature descriptors, and algorithms) that are commonly used for the detection, registration, recognition, classification, and retrieval of 3D objects. Both also place strong emphasis on recent techniques motivated by the spread of commodity devices for 3D acquisition. Part 4 demonstrates the use of these techniques in a selection of 3D shape analysis applications. It covers 3D face recognition, object recognition in 3D scenes, and 3D shape retrieval. It also discusses examples of semantic applications and cross domain 3D retrieval, i.e. how to retrieve 3D models using various types of modalities, e.g. sketches and/or images. The book concludes with a summary of the main ideas and discussions of the future trends. 3D Shape Analysis: Fundamentals, Theory, and Applications is an excellent reference for graduate students, researchers, and professionals in different fields of mathematics, computer science, and engineering. It is also ideal for courses in computer vision and computer graphics, as well as for those seeking 3D industrial/commercial solutions.
Book Synopsis 3D Imaging, Analysis and Applications by : Yonghuai Liu
Download or read book 3D Imaging, Analysis and Applications written by Yonghuai Liu and published by Springer Nature. This book was released on 2020-09-11 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook is designed for postgraduate studies in the field of 3D Computer Vision. It also provides a useful reference for industrial practitioners; for example, in the areas of 3D data capture, computer-aided geometric modelling and industrial quality assurance. This second edition is a significant upgrade of existing topics with novel findings. Additionally, it has new material covering consumer-grade RGB-D cameras, 3D morphable models, deep learning on 3D datasets, as well as new applications in the 3D digitization of cultural heritage and the 3D phenotyping of crops. Overall, the book covers three main areas: ● 3D imaging, including passive 3D imaging, active triangulation 3D imaging, active time-of-flight 3D imaging, consumer RGB-D cameras, and 3D data representation and visualisation; ● 3D shape analysis, including local descriptors, registration, matching, 3D morphable models, and deep learning on 3D datasets; and ● 3D applications, including 3D face recognition, cultural heritage and 3D phenotyping of plants. 3D computer vision is a rapidly advancing area in computer science. There are many real-world applications that demand high-performance 3D imaging and analysis and, as a result, many new techniques and commercial products have been developed. However, many challenges remain on how to analyse the captured data in a way that is sufficiently fast, robust and accurate for the application. Such challenges include metrology, semantic segmentation, classification and recognition. Thus, 3D imaging, analysis and their applications remain a highly-active research field that will continue to attract intensive attention from the research community with the ultimate goal of fully automating the 3D data capture, analysis and inference pipeline.
Book Synopsis Manufacturing Feature Recognition by 3d Solid Model Slicing and Contour Based Geometric Reasoning by : Rajendran Pullat
Download or read book Manufacturing Feature Recognition by 3d Solid Model Slicing and Contour Based Geometric Reasoning written by Rajendran Pullat and published by . This book was released on 2010 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: Feature recognition is a vital link in the integration of computer-aided design (CAD) and computer-aided manufacturing (CAM). The significance of automated feature recognition has increased manifold in recent years, due to the ever growing emphasis on automation of manufacturing processes. However, there are several open challenges in the field of manufacturing feature recognition, including issues of robustness, computational speed, and applicability of a given technique to different manufacturing domains. Most of the existing research in this field employs one of the following methodologies for feature extraction: graph-based method, hint-based method and volumetric decomposition. The method proposed in this research does not exactly fit in to any of these approaches. It involves selective slicing of a given solid model at multiple levels and in multiple directions, and using contour based reasoning to identify form features. The slicing levels as well as the slicing directions are intelligently derived based on the geometry of the part. Each slice view comprises of one or more closed contours. By combining the information pertaining to the contours in successive slices, rules are formed to recognize manufacturing features. Features that can be recognized with this method include machining and casting/molding features. Recognition of different types of intersecting features is an important advantage of this method. This technique also effectively addresses another drawback of many feature recognition algorithms, which is the inability to recognize features with varying topology and/or geometry. The proposed method is validated by successfully testing the developed rules on different 3D part models.
Book Synopsis Develop Rapid 3D Surface Measurement Systems for Quality Inspection in the Manufacturing Industry by : Quan Shi
Download or read book Develop Rapid 3D Surface Measurement Systems for Quality Inspection in the Manufacturing Industry written by Quan Shi and published by . This book was released on 2008 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Thomas Register of American Manufacturers by :
Download or read book Thomas Register of American Manufacturers written by and published by . This book was released on 2002 with total page 1956 pages. Available in PDF, EPUB and Kindle. Book excerpt: This basic source for identification of U.S. manufacturers is arranged by product in a large multi-volume set. Includes: Products & services, Company profiles and Catalog file.
Book Synopsis Latest Developments in Reality-Based 3D Surveying and Modelling by :
Download or read book Latest Developments in Reality-Based 3D Surveying and Modelling written by and published by Mdpi AG. This book was released on 2018-01-18 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book originates from the ISPRS/CIPA Workshop "3D-ARCH 2017 - 3D Virtual Reconstruction and Visualization of Complex Architectures," which was held in March 2017 in Nafplio, Greece. The main workshop's scope was to bring together scientists, developers and advanced users in 3D surveying and data processing and to encourage cooperation and practice sharing in the various fields where 3D technologies are nowadays used. The workshop focused primarily on multi-source and multi-sensors approaches, low-cost sensors and open-source algorithms for terrestrial 3D modelling, automation in data registration, image matching and 3D reconstruction, point cloud analysis, 4D modelling, BIM/HBIM and procedural modelling, accuracy requirement and assessment in 3D reconstructions, 3D applications in terrestrial and underwater environments, Virtual and Augmented Reality (VR/AR) applied to the visualization and conservation of complex architectures and heritage. The most exciting and innovative papers presented at the workshop were selected to be extended and included in this cornerstone collection.
Book Synopsis Guide to Three Dimensional Structure and Motion Factorization by : Guanghui Wang
Download or read book Guide to Three Dimensional Structure and Motion Factorization written by Guanghui Wang and published by Springer. This book was released on 2012-11-06 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: The problem of structure and motion recovery from image sequences is an important theme in computer vision. Considerable progress has been made in this field during the past two decades, resulting in successful applications in robot navigation, augmented reality, industrial inspection, medical image analysis, and digital entertainment, among other areas. However, many of these methods work only for rigid objects and static scenes. The study of non-rigid structure from motion is not only of academic significance, but also has important practical applications in real-world, nonrigid or dynamic scenarios, such as human facial expressions and moving vehicles. This practical guide/reference provides a comprehensive overview of Euclidean structure and motion recovery, with a specific focus on factorization-based algorithms. The book discusses the latest research in this field, including the extension of the factorization algorithm to recover the structure of non-rigid objects, and presents some new algorithms developed by the authors. Readers require no significant knowledge of computer vision, although some background on projective geometry and matrix computation would be beneficial. Topics and features: presents the first systematic study of structure and motion recovery of both rigid and non-rigid objects from images sequences; discusses in depth the theory, techniques, and applications of rigid and non-rigid factorization methods in three dimensional computer vision; examines numerous factorization algorithms, covering affine, perspective and quasi-perspective projection models; provides appendices describing the mathematical principles behind projective geometry, matrix decomposition, least squares, and nonlinear estimation techniques; includes chapter-ending review questions, and a glossary of terms used in the book. This unique text offers practical guidance in real applications and implementations of 3D modeling systems for practitioners in computer vision and pattern recognition, as well as serving as an invaluable source of new algorithms and methodologies for structure and motion recovery for graduate students and researchers.
Download or read book Thomas Register written by and published by . This book was released on 2004 with total page 2062 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis 3D Graphics and Modelica by : Vadim Engelson
Download or read book 3D Graphics and Modelica written by Vadim Engelson and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Modelica standard library and available Modelica tools contain some facilities for specification of 3D geometry and 3D graphics. Geometry and graphics is associated with physical objects included in simulated Modelica models. However, important graphics properties are missing from this model. In particular, physical objects cannot change their shape (geometry) and rendering features (graphics) dynamically. The physics of simulation, is often not affected by geometry of physical objects. For instance, a body is often approximated by its center of mass under certain conditions. Either simple predefined shapes or specifications of geometry via external files are used. The last facility leads to separation between the model and the corresponding graphics and geometry. Our proposal is to integrate 3D geometric and graphical features with Modelica models of physical objects. The 3D graphics information is specified explicitly via annotations containing certain graphics primitives or using instances from a specially designed geometry class library. The motivation, syntax and implementation outline for this approach are discussed in this report.
Book Synopsis Three-dimensional Object Registration Using Wavelet Features by : Julie Steele Chalfant
Download or read book Three-dimensional Object Registration Using Wavelet Features written by Julie Steele Chalfant and published by . This book was released on 2008 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent developments in shape-based modeling and data acquisition have brought three-dimensional models to the forefront of computer graphics and visualization research. New data acquisition methods are producing large numbers of models in a variety of fields. Three-dimensional shape-based matching and registration (alignment) are key to the useful application of such models in areas from automated surface inspection to cancer detection and surgery. The three-dimensional models in these applications are typically huge. State-of-the-art simulations in computational fluid dynamics produce upward of four terabytes of data per second of flow. Research-level magnetic resonance imaging (MRI) resolutions can reach 1 cubic micro-meter. As a result, object registration and matching algorithms must handle very large amounts of data. The algorithms developed in this thesis accomplish automatic registration and matching of three-dimensional voxelized models. We employ features in a wavelet transform domain to accomplish registration. The features are extracted in a multiresolutional format, thus delineating features at various scales for robust and rapid matching. Registration is achieved through seeking peaks in sets of rotation quaternions using a voting scheme, then separately identifying translation. The method is robust to occlusion, clutter and noise. The efficacy of the algorithm is demonstrated through examples from solid modeling and medical imaging applications.
Book Synopsis 3d Surface Registration Using Geometric Spectrum of Shapes by : Hajar Hamidian
Download or read book 3d Surface Registration Using Geometric Spectrum of Shapes written by Hajar Hamidian and published by . This book was released on 2019 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt: The function is deƠ̐1ned by the integration of a smooth term to align the eigenvalues and a distance term between the eigenvectors at feature points to align the eigenvectors. The feature points are generated using the static points of certain eigenvectors of the surfaces. By using both the eigenvalues and the eigenvectors on these feature points, the computational efƠ̐1ciency is improved considerably without losing the accuracy in comparison to the approaches that use the eigenvectors for all vertices. The variation of the shape is expressed using a scale function deƠ̐1ned at each vertex. Consequently, the total energy function to align the two given surfaces can be deƠ̐1ned using the linear interpolation of the scale function derivatives. Through the optimization the energy function, the scale function can be solved and the alignment is achieved. After the alignment, the eigenvectors can be employed to calculate the point to point correspondence of the surfaces. Therefore, the proposed method can accurately deƠ̐1ne the displacement of the vertices. For both methods, we evaluate them by conducting some experiments on synthetic and real data using hippocampus and heart data. These experiments demonstrate the advantages and accuracy of our methods. We then integrate our methods to a workƠ̐2ow system named DataView. Using this workƠ̐2ow system, users can design, save, run, and share their workƠ̐2ow using their web-browsers without the need of installing any software and regardless of the power of their computers. We have also integrated Grid to this system therefore the same task can be executed on up to 64 different cases which will increase the performance of the system enormously.
