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检索条件"任意字段=International Conference on Computer Graphics, Imaging and Visualization"

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international conference on computer Vision and graphics, ICCVG 2014

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international conference on computer Vision and graphics, ICCVG 2014

ISBN: (纸本)9783319113302

The proceedings contain 81 papers. The special focus in this conference is on computer Vision and graphics. The topics include: A validation of combined metrics for color image quality assessment;quartic orders and sharpness in trajectory estimation for smooth cumulative chord cubics;parallel simulation of atmospheric halo phenomena;mandelbrot- and julia-like rendering of polynomiographs;time compensation in perceptual experiments;fur visualisation for computer game engines and real-time rendering;multiple scattering in cumulus clouds;component weight tuning of SSIM image quality assessment measure;ground truth and performance evaluation of lane border detection;gaze-driven object tracking based on optical flow estimation;compression of synthetic-aperture radar images;feynman-kac formula and restoration of high ISO images;fusion of visual and range images for object extraction;noise reduction in thermal images;advantages of using object-specific knowledge at an early processing stage in the detection of trees in LIDAR data;a modular workflow architecture for coronary centerline extraction in computed tomography angiography data;simulated holography based on stereoscopy and face tracking;automatic assessment of skull circumference in craniosynostosis;performance evaluation of binary descriptors of local features;adaptive and quality-aware storage of JPEG files in the web environment;egomotion estimation by point-cloud back-mapping;multiple instances detection in RGBD images;automated traffic analysis in aerial images;unsupervised detector adaptation by joint dataset feature learning;true zoom with cylindrical light feld system;computer simulation of the swi protocol in nuclear magnetic resonance imaging.

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Enhanced visualization of Customized Manufacturing Data 29

Enhanced Visualization of Customized Manufacturing Data

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29th international conference in Central Europe on computer graphics, visualization and computer Vision, WSCG 2021

作者： Kurasova, Olga Marcinkevičius, Virginijus Mikulskienė, Birutė Mykolas Romeris University Ateities str. 20 VilniusLT-08303 Lithuania

ISBN: (纸本)9788086943343

Recently, customized manufacturing is gaining much momentum. Consumers do not want mass-produced products but are looking for unique and exclusive ones. It is especially evident in the furniture industry. As it is necessary to set an individual price for each individually manufactured product, companies face the need to quickly estimate a preliminary cost and price as soon as an order is received. The task of estimating costs as precise and timely as possible has become critical in customized manufacturing. The cost estimation problem can be solved as a prediction problem using various machine learning (ML) techniques. In order to obtain more accurate price prediction, it is necessary to delve deeper into the data. Data visualization methods are excellent for this purpose. Moreover, it is necessary to consider that the managers who set the price of the product are not ML experts. Thus, data visualization methods should be integrated into the decision support system. On the one hand, these methods should be simple, easily understandable and interpretable. On the other hand, the methods should include more sophisticated approaches that allowed reveal hidden data structure. Here, dimensionality-reduction methods can be employed. In this paper, we propose a data visualization process that can be useful for data analysis in customized furniture manufacturing to get to know the data better, allowing us to develop enhanced price prediction models. © 2021 University of West Bohemia. All rights reserved.

关键词： Cost estimating

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Time-varying image data visualization framework for application in cardiac catheterization procedures

Time-varying image data visualization framework for applicat...

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6th Theory and Practice of computer graphics conference, TPCG 2008

作者： Ma, Y.L. Rhode, K.S. King, A.P. Gao, G. Chinchapatnam, P. Schaeffter, T. Razavi, R. Saetzler, K. Imaging Sciences King's College London SE1 7EH United Kingdom Centre for Medical Image Computing University College London M13 9PL United Kingdom System Biology Research Group University of Ulster Coleraine BT52 1SA United Kingdom

ISBN: (纸本)9783905673678

visualization plays an important role in image guided surgery. This paper presents a real-time 3D motion visualization method where pre-computed meshes of the beating heart are synchronized with and overlaid onto live X-ray images. This provides the surgeon with a navigational aid in guiding catheters during cardiac catheterization. In order to generate time-varying meshes of the beating heart, we first acquire a time-series of images of the patient using Magnetic Resonance imaging (MRI). The MRI heart images used for the cardiac catheterization procedures can either be contrast-enhanced by injecting a contrast agent prior to imaging or they can be unenhanced. The contrast-enhanced images can easily be segmented and binarized using a fixed grey-level threshold. In this case, we can use an adaptive Delaunay-based surface extraction algorithm for mesh generation, for which specifically developed for noisy binary image data sets. For unenhanced images, we have to choose a semi-automated segmentation approach, where a region of interest in the patient's heart is outlined manually in an intermediate slice in the 3-D MRI data set and then propagated to neighbouring slices. In a next step, the extracted snake contours are propagated in time from the first phase of the cardiac cycle to subsequent phases using multiple snake contours. In this scenario, the final mesh is generated using a serial section reconstruction algorithm. However, due to the nature of the underlyling MRI images which frequently contain areas of inhomogenous contrast caused by motion and blood flow, it is difficult to generate a smooth mesh directly from the result of the previously described semi-automatic segmentation procedure. Therefore, we also introduce a contour-based mesh smoothing algorithm using a 1D Gaussian filter in order to post-process the snake contours along the series of cross-sections before reconstruction. © The Eurographics Association 2008.

关键词： Augmented reality

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Design and Implementation of a Multidimensional Zoomable Electronic Catalog

Design and Implementation of a Multidimensional Zoomable Ele...

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international conference on computer graphics, imaging and visualization, CGIV

作者： Monrawee Chainchainirattisai Paul Janecek Asian Institute of Technology Thailand

Consumers select products based on a combination of decision criteria and preferences, such as price, quality, appearance, origin, and popularity. However, current interfaces for electronic catalogs do not adequately support the multi-criteria searching, browsing, and comparison tasks typical of consumer "bargain hunting" behavior. This paper presents the design and implementation of a visual interface for a large electronic catalog that represents products as a collection of images in a compact, zoomable, multidimensional grid. At the overview level, the spatial dimensions represent the price and quality tradeoffs that typically guide buying behavior. As a user zooms into regions of interest, the spatial dimensions are overloaded to represent additional decision criteria, such as product category and ratings. An empirical evaluation found that users preferred this new visual interface to a traditional tabular interface on measures of confidence, usability, and satisfaction, especially for multi-criteria comparison tasks.

关键词： Multidimensional systems Electronic catalog Prototypes visualization Software prototyping User interfaces Usability Electronic commerce computer graphics Testing

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PondView: Intuitive and Efficient visualization of 3D GPR Data 17

PondView: Intuitive and Efficient Visualization of 3D GPR Da...

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17th international conference on Ground Penetrating Radar, GPR 2018

作者： Grasmueck, M. Viggiano, D. RSMAS University of Miami Department of Marine Geosciences FL United States

ISBN: (纸本)9781538657775

The demand for high resolution 3D GPR imaging of the subsurface results in the acquisition of large datasets in utility mapping, archeological prospection, and concrete structural inspection. visualization, analysis, and interpretation of such data is plagued by the need of high-end hardware and software, limited survey size for smooth user interaction, and the loss of resolution and low amplitude features contained in the original high-quality data. To overcome these bottlenecks, we use a 2D color matrix to automatically color code by amplitude and depth all features visible in thick horizontal slices. The resulting PondView is a top view of the buried features as if they were submerged in a clear pond illuminated by the sun from above. Prototype test results on a full-resolution 500 MHz 3D GPR survey show how pipes, tree roots and small metal objects can be easily recognized, interpreted, and located with centimeter precision without the need of vertical profiles. PondView bitmaps and animations can be generated on a standard PC and viewed on handheld devices like photographs and movies. © 2018 IEEE.

关键词： Ground penetrating radar systems

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Balancing CPU and GPU: Real-time visualization of large scale 3D scanning models

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3rd international conference on Grid and Cooperative Computing (GCC 2004)

作者： Dong, Z Chen, W Zhang, L Peng, QS Zhejiang Univ State Key Lab CAD & CG Hangzhou 310027 Peoples R China

ISBN: (纸本)3540235787

Recent advances in 3D scanning technologies have enabled us to acquire large scale point-clouds data rapidly. Point-based representation has been introduced as a versatile and powerful graphics primitive. This paper proposes an adaptive rendering algorithm for large scale point models. The algorithm first subdivide the target model into multiple patches in the preprocess. A hierarchical structure is built for each patch and then converted into a linear binary tree. During rendering, the model is processed patch by patch. Fast visibility decision is made to cull invisible patches. Visible patches are displayed in graphics processing units (GPU) by choosing appropriate rendering mode, i.e, a distance-dependent strategy. Our algorithm takes full advantage of CPU and effectively balances the workload between CPU and CPU. We also propose a fast compression/decompression technique which achieves 8 times compression ratio. Experimental results demonstrates high performance and image quality rendering for large scale 3D scanning models in consumer PCs.

关键词： graphics processing unit

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Proceedings of the 2008 international conference on Modeling, Simulation and visualization Methods, MSV 2008

Proceedings of the 2008 International Conference on Modeling...

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2008 international conference on Modeling, Simulation and visualization Methods, MSV 2008

ISBN: (纸本)1601320817

The proceedings contain 49 papers. The topics discussed include: modeling the spread of mobile malware;real-time modeling and simulation of traffic;modeling and simulation of human lumbar spine;a model for the economic costs of biological invasion;tetrahedral mesh generation of human cardiac model from imaging dataset;simulation of an optical tracking control system of a differentially-driven wheeled mobile robot;simulation and modeling of a virtual library for navigation and evacuation;interactive fluid simulation and its remote steering framework with visual and haptic feedback;swarm shopping - the simulation of herd behavior;a simulator for training fossil-fuel power plants operators with an HMI based on a multi-window system;multiple UAV simulation with multiresolution multistage models and decision support;computer assisted simulation model of renal tumor cryosurgery;and networked parallel simulation of transmission grid.

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TOWARD ENHANCEMENT OF THE AIRBORNE 3D visualization CAPABILITIES OF THE HOLOVIZIO SYSTEM

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ASME/AFM World conference on Innovative Virtual Reality

作者： Kooijman, Adrie Horvath, Imre Rusak, Zoltan Delft Univ Technol Fac Ind Design Engn NL-2600 AA Delft Netherlands

ISBN: (纸本)9780791843376

Implementation of tangible virtuality means providing means for creating airborne visual images, rendering them with physical properties and making them sensible for the human senses. Airborne creation and direct manipulation requires separating the virtual objects from the image generating (physical rendering) device. One step in this direction is using electroholographic, or pseudo-electroholographic, devices which are able to create virtual objects in mid-air by various light interference techniques. A virtual object is a computer model, visualized by the projection system to appear as a real, tangible object. Te enable the required direct interaction with the virtual objects these have to be perceptually separated from the projected device, they have to be perceived as floating in the air. In our research we use the Holovizio Hv128WD system, a mono-parallax, high resolution holographic imaging device supporting 3D image visualization rather than physical rendering of virtual objects. The device generates 62 views of virtual objects where each view is visible from a specific viewing direction. The user of the system perceives this as a stereo view to the object. We have been collecting application experiences related to this device for more than one year, and we have found some restrictions and limitations in the image creating capabilities which we are trying to eliminate in our current research. This paper reports on the first phase of research which focuses on some major image generation problems and exploration of possible hardware, software or data management causes. The goal of this first phase is to develop and validate the proper measurement methods. A pilot experiment is performed to verify the applicability of the method. The results show that the proposed measurement methods are feasible and helpful in analyzing the observed problems. Some problems appear to have a more fundamental cause and may only be worked around.

关键词： computer software Rendering Hardware visualization imaging Parallax computers Optical interference Resolution (Optics)

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Towards a tracking algorithm based on the clustering of spatio-Temporal clouds of points 11

Towards a tracking algorithm based on the clustering of spat...

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11th international conference on computer graphics Theory and Application, GRAPP 2016;Part of the 11th Joint conference on computer Vision, imaging and computer graphics Theory and Applications, VISIGRAPP 2016

作者： Cavagna, Andrea Creato, Chiara Del Castello, Lorenzo Melillo, Stefania Parisi, Leonardo Viale, Massimiliano Istituto Sistemi Complessi Consiglio Nazionale Delle Ricerche UOS Sapienza Rome00185 Italy Dipartimento di Informatica Universita' Sapienza Rome00198 Italy

The interest in 3D dynamical tracking is growing in fields such as robotics, biology and fluid dynamics. Recently, a major source of progress in 3D tracking has been the study of collective behaviour in biological systems, where the trajectories of individual animals moving within large and dense groups need to be reconstructed to understand the behavioural interaction rules. Experimental data in this field are generally noisy and at low spatial resolution, so that individuals appear as small featureless objects and trajectories must be retrieved by making use of epipolar information only. Moreover, optical occlusions often occur: in a multicamera system one or more objects become indistinguishable in one view, potentially jeopardizing the conservation of identity over long-Time trajectories. The most advanced 3D tracking algorithms overcome optical occlusions making use of set-cover techniques, which however have to solve NP-hard optimization problems. Moreover, current methods are not able to cope with occlusions arising from actual physical proximity of objects in 3D space. Here, we present a new method designed to work directly in 3D space and time, creating (3D + 1) clouds of points representing the full spatio-Temporal evolution of the moving targets. We can then use a simple connected components labeling routine, which is linear in time, to solve optical occlusions, hence lowering from NP to P the complexity of the problem. Finally, we use normalized cut spectral clustering to tackle 3D physical proximity. © 2016 SciTePress. All rights reserved.

关键词： computer vision

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Disaster assessment with parallel image processing for GIS based local area disaster decision support system 10

Disaster assessment with parallel image processing for GIS b...

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1st international conference and Exhibition on Computing for Geospatial Research and Application, COM.Geo 2010

作者： Nicolai, Barbara Jin, Ge Jiang, Keyuan Winer, Charles Dept. of Computer Information Technology and Graphics Purdue University Calumet 2200 169th St. Hammond IN 46323 United States

ISBN: (纸本)9781450300315

Natural disasters, such as hurricanes, tsunamis and earthquakes cause huge loss of life, enormous amounts of property damage, and lengthy recovery times. Although it is impossible to avoid the costs of disasters, human sufferings can be minimized through effective disaster management and decision support system that can facilitate and expedite the resource distribution process more efficiently and effectively. This paper is to present the design of GIS based disaster data management, visualization and decision support system for North West Indiana region utilizing grid computing and visualization resources at Purdue University Calumet (PUC). One of the key factors in the disaster management system is to provide damage assessment maps in timely manner. We propose a parallel image processing algorithm utilizing computational grid to compute the disaster damage assessment map from pre- and post- disaster satellite images. Disaster decision support system will compute the effective resource distribution strategy and prioritize the rescue areas by utilizing disaster specific geospatial information system. This research will lay a foundation for disaster preparedness, management and decision support system at local government agency level. © 2010 ACM.

关键词： Disasters

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