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检索条件"任意字段=International Symposium on 3D Data Processing Visualization and Transmission"

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The ASdMCon Project: The Challenge of detecting defects on Construction Sites

The ASDMCon Project: The Challenge of Detecting Defects on C...

引用

international symposium on 3d data processing visualization and transmission

作者： Kui Yue daniel Huber Burcu Akinci Ramesh Krishnamurti Department of Architecture Carnegie Mellon University Pittsburgh PA USA Robotics Institute Carnegie Mellon University Pittsburgh PA USA Department of Civil and Environmental Engineering Carnegie Mellon University Pittsburgh PA USA

Techniques for three dimensional (3d) imaging and analysis of as-built conditions of buildings are gaining acceptance in the architecture, engineering, and construction (AEC) community. Early detection of defects on construction sites is one domain where these techniques have the potential to revolutionize an industry, since construction defects can consume a significant portion of a project's budget. The ASdMCon project is developing methods to aid site managers in detecting and managing construction defects using 3d imaging and other advanced sensor technologies. This paper presents an overview of the project, its 4d visualization environment, and the 3d segmentation and recognition strategies that are being employed to automate defect detection.

关键词： Variable speed drives Project management Technology management Image analysis Buildings Architecture Construction industry Image sensors visualization Image segmentation

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Philips 3d Solutions: From Content Creation to visualization

Philips 3D Solutions: From Content Creation to Visualization

引用

international symposium on 3d data processing visualization and transmission

作者： Andre Redert Robert-Paul Berretty Chris Varekamp Oscar Willemsen Jos Swillens Hans driessen Philips Research Laboratories Eindhoven Netherlands Philips 3D Solutions Eindhoven Netherlands

Philips is realizing an end-to-end 3d display solution from 3d content creation to visualization. This development fits in our long-standing tradition of combining expertise in video processing with our strength in display development to create the most exciting and best viewing experience. Philips developed several high-quality 3d displays, ranging in resolution, viewing angle, depth experience, and sizes from 4" to 40" and up. Backwards compatibility with 2d content is enabled via signal processing or opto-electronic 3d & 2d dual mode displays. Content creation and conversion methods are provided, which are a key factor for the success of 3d displays. Fully automatic conversion from monoscopic 2d content into 3d enables the re-use of all existing 2d video material. Further methods enable 3d animation/design, 2d to 3d conversion in post- production and live capture of new 3d content. Our efforts in MPEG standardization towards the "2d-plus-depth" format for 3d video enables a flexible interface between the variety in 3d content creation methods and the range in 3d displays. Furthermore, the 3d format is compatible with existing 2d content, standards and infrastructure. Currently, Philips offers several commercial 3d products for professional use such as digital signage, and progress is being made towards consumer products such as 3dTV.

关键词： Three dimensional displays Two dimensional displays Animation Standardization Information geometry data visualization Application software Image converters Laboratories Image processing

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Synthesis of 3d Model of a Magnetic Field-Influenced Body from a Single Image

Synthesis of 3D Model of a Magnetic Field-Influenced Body fr...

引用

international symposium on 3d data processing visualization and transmission

作者： Cuilan Wang Timothy S. Newman dennis Gallagher Computer Science Department University of Alabama Huntsville Huntsville AL USA National Space Science and Technology Center NASA Marshall Space Flight Center Huntsville AL USA

A method for recovery of a 3d model of a planet-sized cloud-like structure that is in motion and deforming but approximately governed by magnetic field properties is described. The method allows recovery of the model from a single intensity image in which the structure's silhouette can be observed. The method exploits envelope theory and a magnetic field model. Given one intensity image and the segmented silhouette in the image, the method proceeds without human intervention to produce the 3d model. In addition to allowing 3d model synthesis, the method's capability to yield a very compact description offers further utility. Application of the method to real-world data is also demonstrated.

关键词： Magnetic fields Plasma density Plasma materials processing Plasma applications Space technology Magnetosphere Plasma sources deformable models NASA Magnetic properties

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High-Performance Multi-View Reconstruction

High-Performance Multi-View Reconstruction

引用

international symposium on 3d data processing visualization and transmission

作者： Christopher Zach Mario Sormann Konrad Karner VRVis Research Center Graz Austria

We present a high performance reconstruction approach, which generates true 3d models from multiple views with known camera parameters. The complete pipeline from depth map generation over depth image integration to the final 3d model visualization is performed on programmable graphics processing units (GPUs). The proposed pipeline is suitable for long image sequences and uses a plane- sweep depth estimation procedure optionally employing robust image similarity functions to generate a set of depth images. The subsequent volumetric fusion step combines these depth maps into an impicit surface representation of the final model, which can be directly displayed using GPU- based ray casting methods. depending on the number of input views and the desired resolution of the final model the computing times range from several seconds to a few minutes. The quality of the obtained models is illustrated with real-world datasets.

关键词： Image reconstruction Pipelines Cameras Image generation visualization Graphics Image sequences Robustness Fusion power generation Casting

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Geometry Refinement of 3d Surfaces Using Kriging

Geometry Refinement of 3D Surfaces Using Kriging

引用

international symposium on 3d data processing visualization and transmission

作者： Bran Grinstead Andreas Koschan Mongi A. Abidi Imaging Robotics and Intelligent Systems Laboratory University of Tennessee USA

3d imaging is a popular method for acquiring accurate models for a variety of applications. However, the size of the geometric features that can be modeled in this manner is dependant on the scanning system's resolution. This paper presents a method that attempts to accurately reconstruct regions whose features are at or below the system's scanning resolution, combining automatic region selection with a form of kriging. A curvature-based segmentation is followed by an automated geometry refinement procedure in which the model of spatial correlation between the irregularly sampled 3d data is automatically determined. Geometry refinement is done by a regularized kriging approach that is designed to preserve the sharp features typical to many 3d laser range applications. This method is validated on synthetic data, showing that the accuracy of our method is higher than that of its standard competitors. Then, the performance on real data is demonstrated through several examples.

关键词： Geometry Solid modeling Spatial resolution Geometrical optics Surface reconstruction Image reconstruction diversity reception Optical design Laser applications Laser modes

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3d Reconstruction by Gluing Pair-Wise Euclidean Reconstructions, or "How to Achieve a Good Reconstruction from Bad Images"

3D Reconstruction by Gluing Pair-Wise Euclidean Reconstructi...

引用

international symposium on 3d data processing visualization and transmission

作者： daniel Martinec Tomas Pajdla Center for Machine Perception Department of Cybernetics Faculty of Electrical Engineering Czech Technical University Prague Czech Republic

This paper presents a new technique for estimating a multi- view reconstruction given pair-wise Euclidean reconstructions up to rotations, translations and scales. The partial reconstructions are glued by the following three step procedure: (i) Camera rotations consistent with all reconstructions are estimated linearly, (ii) All the pair-wise reconstructions are modified according to the new rotations and refined by bundle adjustment while keeping the corresponding rotations same. (Hi) The refined rotations are used to estimate both camera translations and 3d points using Second Order Cone Programming by minimizing the Linfin- norm. We introduce a new criterion for evaluating importance of an epipolar geometry in influence on the overall 3d geometry. The estimated importance is used to reweight data in the above algorithm to better handle unequiponderantly captured images. The performance of the proposed method is demonstrated on difficult wide base-line image sets.

关键词： Image reconstruction Cameras Geometry Cybernetics Linear programming data processing data visualization Optimization methods Stability Quaternions

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Evaluation of global versus piecewise registration using a ground truth canine model

Evaluation of global versus piecewise registration using a g...

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2006 3rd IEEE international symposium on Biomedical Imaging: From Nano to Macro

作者： Rettmann, M.E. Holmes III, d.R. Su, Y. Kolasa, M.W. Johnson, S.B. Packer, d.L. Robb, R.A. Biomedical Imaging Resource Mayo Clinic College of Medicine Rochester MN United States Division of Cardiology/Electrophysiology Mayo Clinic College of Medicine Rochester MN United States

ISBN: (纸本)0780395778

Minimally invasive cardiac catheter ablation procedures for treatment of myocardial arrhythmias require effective visualization of the relevant heart anatomy and electrophysiology. In a typical ablation procedure, the visualization tools available to the cardiologist include fluoroscopy, ultrasound, and a coarse 3d model of cardiac anatomy and electrical activity. Recent advances in visualization techniques for cardiac ablation procedures have provided the capability to incorporate detailed, patient specific anatomical image data into the procedure. One of the main challenges, however, lies in registering tracked catheter points collected during the procedure to preoperative, patient specific data. While cardiac gating can help to compensate for motion throughout the cardiac cycle, respiratory motion still remains an issue. In a previous simulation study, we showed that piecewise linear registration performs better than global registration for this application. There are two main goals of the current work. First, we generate a ground truth dataset that can be used to evaluate the performance of registration techniques in the application of cardiac ablation procedures. Second, we use this dataset to compare the performance of global versus piecewise registration. © 2006 IEEE.

关键词： Image processing

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ShapeLab: A Unified Framework for 2d & 3d Shape Retrieval

ShapeLab: A Unified Framework for 2D & 3D Shape Retrieval

引用

international symposium on 3d data processing visualization and transmission

作者： Jiantao Pu Karthik Ramani Purdue Research and Education Center for Information Systems in Engineering (PRECISE) Purdue University West Lafayette IN USA

2d or 3d shapes are the most important visual information that we use to recognize an object. We propose a unified framework "ShapeLab" to search similar 2d or 3d shapes from an existing database. Users can search 3d shapes with a 2d input, and vice versa. ShapeLab is composed of four key components: (1) pose determination for 3d models; (2) 2d orthogonal view generation based on multiple levels of detail; (3) similarity measurement between 2d shapes; and (4) freehand sketch-based user interface. Key algorithms supporting the above components are briefly described. Experiments show ShapeLab can provide a better performance such as high accuracy, flexibility and scalability compared to the available methods.

关键词： Shape measurement Information retrieval User interfaces Systems engineering education Information systems Systems engineering and theory Visual databases Scalability Extraterrestrial measurements Robustness

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Exploiting 3d Spatial Continuity for Robust Automatic Horizon Matching across Faults

Exploiting 3D Spatial Continuity for Robust Automatic Horizo...

引用

international symposium on 3d data processing visualization and transmission

作者： Fitsum Admasu Klaus Toennies Computer Vision Group University of Magdeburg Germany

Oil and gas exploration decisions are made based on inferences obtained from seismic data interpretation. The interpretation task is getting very time-consuming as seismic data sets become larger. Image processing tools such as auto-trackers assist manual interpretation of horizons-visible boundaries between certain sediment layers in seismic data. Auto-trackers assume data continuities; therefore, their assistance is very limited in areas of discontinuities such as faults. In this paper, we present a method for automatic horizon matching across faults based on a Bayesian approach. A stochastic matching model which integrates 3d spatial information of seismic data and prior geological knowledge is introduced. The optimal matching solution is found by MAP estimate of this model. A simulated annealing with reversible jump Markov Chain Monte Carlo algorithm is employed to sample from a-posteriori distribution. The model was applied to real 3d seismic data, and has shown to produce geologically acceptable horizons matchings.

关键词： Robustness Geology Petroleum Image processing Sediments Bayesian methods Stochastic processes Optimal matching Simulated annealing Monte Carlo methods

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A Modular Scheme for 2d/3d Conversion of TV Broadcast

A Modular Scheme for 2D/3D Conversion of TV Broadcast

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international symposium on 3d data processing visualization and transmission

作者： Sebastian Knorr Evren Imre Burak Ozkalayci A. Aydin Alatan Thomas Sikora Communication Systems Group Technische Universität Berlin Berlin Germany EEE Department Middle East Technical University Ankara Turkey

The 3d reconstruction from 2d broadcast video is a challenging problem with many potential applications, such as 3dTV, free-viewpoint video or augmented reality. In this paper, a modular system capable of efficiently reconstructing 3d scenes from broadcast video is proposed. The system consists of four constitutive modules: tracking and segmentation, self-calibration, sparse reconstruction and, finally, dense reconstruction. This paper also introduces some novel approaches for moving object segmentation and sparse and dense reconstruction problems. According to the simulations for both synthetic and real data, the system achieves a promising performance for typical TV content, indicating that it is a significant step towards the 3d reconstruction of scenes from broadcast video.

关键词： TV broadcasting Layout Multimedia communication Video sequences Cameras Matrix decomposition Augmented reality Object segmentation Technological innovation Karhunen-Loeve transforms

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