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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 case for 3d visualization in dEM assessment

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15th international symposium on Spatial data Handling, SdH 2012

作者： Gousie, Michael B. Wheaton College Norton MA 02766 United States

ISBN: (纸本)9783642323157

The digital Elevation Model, or dEM, is a common way to store elevation data. However, errors in various stages of dEM processing mean that the validity of a particular data point is uncertain. In many visualization systems, uncertainty in the data may be highlighted, but it is often difficult for the viewer to discern the exact nature of the problem. dEMView is a prototype dEM display system that incorporates several uncertainty visualizations, including curvature and local differences, while viewing the surface in two or three dimensions. The Profile Cutter and the magnifier are components of the system that allow the user to view a portion of the surface while keeping in the context of the overall area. In addition, the system displays visualizations for several quantitative uncertainty statistics. A detailed case study shows the efficacy of the system, especially the usefulness of viewing in three dimensions. © Springer-Verlag Berlin Heidelberg 2013.

关键词： visualization

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data Analisis of 4d Phase Contrast MRI in healthy and non-healthy patients

Data Analisis of 4D Phase Contrast MRI in healthy and non-he...

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8th international symposium on Image and Signal processing and Analysis (ISPA)

作者： Soudah, Eduardo Bordone, Maurizio Rodriguez, Marcelino Perez, Jorge S. Li, Chi-Hion Carreras, Francesc UPC Int Ctr Numer Methods Engn CIMNE Barcelona Spain Sant Pau Biomed Res Inst Clinical & Translat Cardiol Barcelona Spain

ISBN: (纸本)9789531841948;9789531841870

""Time-resolved, 3-dimensional phase-contrast magnetic resonance imaging (3d+t PCMRI) is employed to obtain complete spatial and temporal coverage of the vessels blood combined with spatially registered 3-directional pulsatile blood flow velocities[1][2]. Recent studies have reported that Wall Shear Stress (WSS) quantification from PCMRI are able to use the WSS as biomarkers for different aortas pathologies [3]. Figure [1] shows the pathline visualization of blood flow during one cardiac cycle in the heart of a healthy patient at peak early LV filling, diastasis, peak atrial contraction, and peak systole.""

关键词： biomedical MRI blood vessels cardiology data analysis haemodynamics medical image processing

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A method of 3d-GIS application aided with stereo panorama technology

A method of 3D-GIS application aided with stereo panorama te...

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ISPRS/IGU/ICA Joint international Workshop on Borderlands Modelling and Understanding for Global Sustainability

作者： Sun, M. dong, N. Zheng, H. Jiang, C. Ren, X. Peking Univ Inst RS&GIS Beijing 100871 Peoples R China China Univ Min & Technol Beijing 100083 Peoples R China

ISBN: (纸本)9781629935201

So far, three-dimensional geographic information system (3dGIS) has been developed and applied to many fields. However, data capturing is a challenge for complex environment modeling and visualization. Panorama is an elegant method for users to get a real view without being plagued by 3d measurement and modeling. Although someone claimed that panoramas can offer the function of measurement, the results are widely considered not reliable. 3d images composited by laser scanner data are another kind of precise data source to replace traditional 3d modeling. Laser scanners have obvious shortcomings, such as vast data and time-consuming processes. We propose a method of using stereo panorama technology to complement the three-dimensional data acquisition, processing and management. By using two cameras combined with MTI sensors, which provide pose and position measurement. We can obtain the stereo panorama at one time, which enables users to measure positions and orientations of particular features. The panorama can be uploaded to the 3d-GIS in a custom transmission format to provide stereo browsing of data capture sites. Combined with photogrammetry technology, users can also get accurate results by measuring interesting features on the panorama through interactive measurement interface. Based on Google Earth platform, we verified the effectiveness of our developed system. It stands out from traditional methods with its irreplaceable superiority in local 3d data acquisition and updating, as well as its direct data measurement.

关键词： Stereo Measurement 3d-GIS Acquisition Update Application

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3d Ultrasonic Signal Compression Algorithms for High Signal Fidelity

3D Ultrasonic Signal Compression Algorithms for High Signal ...

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IEEE 56th international Midwest symposium on Circuits and Systems (MWSCAS)

作者： Govindan, Pramod Gonnot, Thomas Gilliland, Spenser Saniie, Jafar IIT Dept Elect & Comp Engn Chicago IL 60616 USA

ISBN: (纸本)9781479900664

Ultrasonic signal processing applications require huge amounts of data to be processed. Further, high computational performance is essential to meet the real-time requirements. Compression of the signal helps to reduce the data size and storage requirements as well as allow for rapid transmission of data to remote locations. High signal fidelity is significant in many of practical applications like ultrasound medical imaging and nondestructive testing. In this study, we discuss two methods for ultrasonic signal compression which offer high signal fidelity - discrete Wavelet Transform and signal decimation with the Nyquist rate limit. The compression algorithm is implemented on a reconfigurable system-on-chip platform using programmable hardware logic as well as in software using an embedded processor. The implementation details and the performance of the compression algorithms on both the hardware and software are analyzed in this paper.

关键词： discrete wavelet transforms

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Towards an extensible virtual GEOINT center

Towards an extensible virtual GEOINT center

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12th IFAC/IFIP/IFORS/IEA symposium on Analysis, design, and Evaluation of Human - Machine Systems, HMS 2013

作者： Sainathuni, Bhanuteja Leslie, Monica Williams, Robert L. Wright State University Dayton OH 45324 United States TecAEdge Innovation and Collaboration Ctr. Air Force Research Lab United States

ISBN: (纸本)9783902823410

As the number of devices collecting and sending data in the world are increasing, finding ways to visualize and understand that data is becoming a challenge. This has often been coined as the problem of "Big data." The Virtual Geoint Center (VGC) being developed by research collaborators at TecAEdge facility aims to aid in solving that challenge by providing a way to combine the use of the virtual world with external tools thru a novel and extensible sensor cloud architecture, that was developed to solve a multi modal sensor fusion challenges. Using open-source software such as OpenSim and Blender, the VGC uses a visually stunning 3d environment to display the data sent to it, thru development of optimized visualization techniques. The VGC is broken up into two major components: The Kinect Minimap, and the Geoint Map. The Kinect Minimap uses the Microsoft Kinect and its open-source software to create a 3d representation of the personnel in its field of view. The Geoint Map collects smartphone sensor information in real time from a pervasive network and displays it on user-friendly and navigable map view. By combining external tools and the virtual world, the VGC can help a user "visualize" data, and provide additional tools to "understand" the data. This paper provides the details of the various components of the VGC and also discusses the implications of the present work and insights for the future work. Copyright © 2013 IFAC.

关键词： data visualization

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ON-SITE SEMANTIC MAPPING of ARCHAEOLOGICAL EXCAVATION AREAS 24

ON-SITE SEMANTIC MAPPING of ARCHAEOLOGICAL EXCAVATION AREAS

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2018 TC V - ISPRS 24th international CIPA symposium

作者： Houshiar, H. Borrmann, d. Elseberg, J. Nüchter, A. Näth, F. Winkle, S. School of Engineering and Science Automation Group Jacobs University of Bremen GGmbH Campus Ring 1 Bremen28759 Germany Denkmal3d GbR Windallee 2 Vechta49377 Germany Masswerke GbR Hafenweg 31 Münster48155 Germany

3d laser scanning is the state of the art in modeling archaeological excavation sites, historical sites and even entire cities or landscapes. The documentation of findings on an excavation site is an essential archaeological task. Automated systems accelerate this process and decrease the amount of error to a minimum. This paper presents a new documentation approach in industrial archaeology. It consists of a set of tools for recording and registering 3d data from excavation sites. We provide an efficient tool for visualization of acquired 3d point clouds in 3d and 2d modes. The main purpose of this software is to provide an easy to use, on-site semantic mapping tool for archaeologists. It includes functions for selecting and labeling findings. Additional information can be provided for each label. This data is exported to an XML format and serves as input for other systems and databases. © 2013 Copernicus. All rights reserved.

关键词： 3d Laser Scanner 3d Point Cloud processing Archeology Semantic Mapping

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RECORdING CULTURAL HERITAGE USING TERRESTRIAL LASERSCANNING - dEALING WITH THE SYSTEM, THE HUGE dataSETS THEY CREATE ANd WAYS TO EXTRACT THE NECESSARY dELIVERABLES YOU CAN WORK WITH 24

RECORDING CULTURAL HERITAGE USING TERRESTRIAL LASERSCANNING ...

引用

24th international CIPA symposium

作者： Christofori, E. Bierwagen, J. Ingenieurbur Christofori & Partner D-90574 Rosstal Germany

ISBN: (纸本)9781629935201

Recording Cultural Heritage objects using terrestrial laserscanning becomes more and more popular over the last years. Since terrestrial Laserscanning System (TLS) Manufacturers have strongly increased the amount and speed of data captured with a single scan at each system upgrade and cutting down system costs the use of TLS Systems for recording cultural heritage is an option for recording worth to think about beside traditional methods like Photogrammetric. TLS Systems can be a great tool for capturing complex cultural heritage object within a short amount of time beside the traditional methods but can be a nightmare to handle for further process if not used right while capturing. Furthermore TLS Systems still have to be recognized as survey equipment, even though some of the manufactures promote them as everyday tool. They have to be used in an intelligent way having in mind the clients and the individual cultural objects needs. Thus the efficient way to use TLS Systems for data recording becomes a relevant topic to deal with the huge Amount of data the Systems collect while recording. Already small projects can turn into huge Pointcloud datasets that End user, like Architects or Archaeologist neither can't deal with as their technical equipment doesn't fit the requirements of the dataset nor do they have the software tools to use the data as the current software tools still are high prized. Even the necessary interpretation of the dataset can be a tough task if the people who have to work on with the Pointcloud aren't educated right in order to understand TLS and the results it creates The use of TLS Systems has to have in mind the project requirements of the individual Heritage Object, like the required accuracy, standards for Levels of details (e.g. "Empfehlungen fur die Baudokumentation, Gunther Eckstein, Germany), the required kind of deliverables (visualization, 2d drawings, True deformation drawings, 3d Models, BIM or 4d - Animations) as well as the Projec

关键词： Terrestrial Laserscanning TLS Pointcloud Managing processing datasets deliverables

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Computational Electromagnetics for Mobile devices on Multiple Platforms

Computational Electromagnetics for Mobile Devices on Multipl...

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international symposium of the IEEE-Antennas-and-Propagation-Society

作者： Browne, d. R. Pomeroy, S. C. Flint, J. A. Univ Loughborough Sch Elect Elect & Syst Engn Loughborough LE11 3TU Leics England

ISBN: (纸本)9781467353175

Mobile computing devices are ubiquitous and can now carry out computationally-intensive tasks in a timely fashion. This paper presents multi-platform, computational electromagnetics educational software for modern mobile platforms. Performance of the transmission Line Matrix (TLM) solver has been increased using a Single Instruction, Multiple data (SIMd) processing strategy applicable to the majority of available platforms. Included is discussion of the SIMd strategy, performance benchmarking results and user uptake statistics.

关键词： TLM Education Vector processing SIMd ARM NEON

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AUTOMATIC dENdRITE SPINES dETECTION FROM X-RAY TOMOGRAPHY VOLUMES

AUTOMATIC DENDRITE SPINES DETECTION FROM X-RAY TOMOGRAPHY VO...

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IEEE 10th international symposium on Biomedical Imaging - From Nano to Macro (ISBI)

作者： descombes, Xavier Malandain, Gregoire Fonta, Caroline Negyessy, Lazlo Mosko, Rajmund INRIA I3S IBV Morpheme Sophia Antipolis France UPS CNRS CerCo UMR 5549 Toulouse France Hungarian Acad Sci WRCP Budapest Hungary SLS PSI Villigen Switzerland

ISBN: (纸本)9781467364553

We consider the problem of dendritic spine detection from X-ray micro-tomographic volumes that allow huge volume of tissue visualization. To compensate for the noise in data that induces false positives in the spine detection process, we first segment the dendrites. This segmentation is obtained by computing the medial axis and approximating the results by segments obtained with a 3d Hough transform. dendrites are then reconstructed and a spine mask is obtained using the typical diameter of dendrites and distance between spine and dendrites. A point process is then optimized on this mask, thus providing the spine detection.

关键词： dendritic spine X-Ray micro-tomography 3d Hough transform Point Process

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Efficient transmission and Rendering of RGB-d Views

Efficient Transmission and Rendering of RGB-D Views

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9th international symposium on Visual Computing (ISVC)

作者： Riaz, Zahid Linder, Thorsten Behnke, Sven Worst, Rainer Surmann, Hartmut Fraunhofer IAIS Schloss Birlinghoven D-53754 St Augustin Germany

ISBN: (纸本)9783642419133;9783642419140

For the autonomous navigation of the robots in unknown environments, generation of environmental maps and 3d scene reconstruction play a significant role. Simultaneous localization and mapping (SLAM) helps the robots to perceive, plan and navigate autonomously whereas scene reconstruction helps the human supervisors to understand the scene and act accordingly during joint activities with the robots. For successful completion of these joint activities, a detailed understanding of the environment is required for human and robots to interact with each other. Generally, the robots are equipped with multiple sensors and acquire a large amount of data which is challenging to handle. In this paper we propose an efficient 3d scene reconstruction approach for such scenarios using vision and graphics based techniques. This approach can be applied to indoor, outdoor, small and large scale environments. The ultimate goal of this paper is to apply this system to joint rescue operations executed by human and robot teams by reducing a large amount of point cloud data to a smaller amount without compromising on the visual quality of the scene. From thorough experimentation, we show that the proposed system is memory and time efficient and capable to run on the processing unit mounted on the autonomous vehicle. For experimentation purposes, we use standard RGB-d benchmark dataset.

关键词： Robots

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