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检索条件"任意字段=Conference on Visualization and Data Analysis 2011"

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visualization and Haptics for Interactive Medical Image analysis: Image Segmentation in Cranio-Maxillofacial Surgery Planning

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2nd International Visual Informatics conference

作者： Nystrom, Ingela Nysjo, Johan Malmberg, Filip Uppsala Univ Ctr Image Anal Uppsala Sweden

ISBN: (纸本)9783642251900;9783642251917

A central problem in cranio-maxillofacial (CMF) surgery is to restore the normal anatomy of the skeleton after defects, e.g., trauma to the face. With careful pre-operative planning, the precision and predictability of the craniofacial reconstruction can be significantly improved. In addition, morbidity can be reduced thanks to shorter operation time. An important component in surgery planning is to be able to accurately measure the extent of anatomical structures. Of particular interest are the shape and volume of the orbits (eye sockets). These properties can be measured in 3D CT images of the skull, provided that an accurate segmentation of the orbits is available. Here, we present a system for interactive segmentation of the orbit in CT images. The system utilizes 3D visualization and haptic feedback to facilitate efficient exploration and manipulation of 3D data.

关键词： Image segmentation

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Discussion on the Application of visualization Technology in Modeling and Simulation

Discussion on the Application of Visualization Technology in...

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International conference on Information Management, Innovation Management and Industrial Engineering, ICIII

作者： Yang Na Yuan Shu Liu Chang Yang Xuehui Department of Equipment Command & Administration Academy of Armored Forces Engineering Beijing China Beijing Special Vehicle Institute Beijing China Video Production Department 2th China Central Television Technology Production Center Beijing China Dept. of Equip. Command & Adm. Acad. of Armored Forces Eng. Beijing China

The technology of visualization is widely applied in modeling and simulation (M&S). At first, the principle of simulation visualization is introduced. Then aspects of visualization technology applied in M&S are mainly discussed in this paper, that are, modeling visualization, simulation experiment visualization, simulation result analysis visualization and simulation management visualization. The applications cover all the M&S activities. Modeling visualization includes visualization of models and modeling process, model visualization is elaborated in system models, environment models, relationships and interactions between models, simulation experiment visualization consists of experiment original state visualization and experiment procedure visualization, simulation result analysis visualization is presented with technology of visualization applied in result visible and result analysis and evaluation, visualization management of simulation data and models, experiment design, state stakeout, human computer interaction and manual intervention show the management visualization in simulation.

关键词： data visualization Analytical models data models Computational modeling Mathematical model visualization Unified modeling language

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Spectral-based 2D/3D X-ray to CT image rigid registration

Spectral-based 2D/3D X-ray to CT image rigid registration

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conference on Medical Imaging 2011 - visualization, Image-Guided Procedures, and Modeling

作者： Freiman, M. Pele, O. Hurvitz, A. Werman, M. Joskowicz, L. Hebrew Univ Jerusalem Sch Engn & Comp Sci IL-91905 Jerusalem Israel

ISBN: (纸本)9780819485069

We present a spectral-based method for the 2D/3D rigid registration of X-ray images to a CT scan. The method uses a Fourier-based representation to decompose the six rigid transformation parameters problem into a two-parameter out-of-plane rotation and a four-parameter in-plane transformation problems. Preoperatively, a set of Digitally Reconstructed Radiographs (DRRs) are generated offline from the CT in the expected in-plane location ranges of the fluoroscopic X-ray imaging devices. Each DRR is transformed into a imaging device in-plane invariant features space. Intraoperatively, a few 2D projections of the patient anatomy are acquired with an X-ray imaging device. Each projection is transformed into its in-plane invariant representation. The out-of-plane parameters are first computed by maximization of the Normalized Cross-Correlation between the invariant representations of the DRRs and the X-ray images. Then, the in-plane parameters are computed with the phase correlation method based on the Fourier-Mellin transform. Experimental results on publicly available data sets show that our method can robustly estimate the out-of-plane parameters with accuracy of 1.5 degrees in less than 1sec for out-of-plane rotations of 10 degrees or more, and perform the entire registration in less than 10secs.

关键词： X-ray imaging Image registration X-rays X-ray computed tomography Imaging devices Rigid registration Fourier transforms 3D image processing Image restoration Error analysis

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CASASviz: Web-based visualization of behavior patterns in smart environments

CASASviz: Web-based visualization of behavior patterns in sm...

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IEEE Annual conference on Pervasive Computing and Communications Workshops (PerCom)

作者： Chao Chen Prafulla Dawadi School of Electrical Engineering and Computer Science Washington State University Pullman USA

The need to prolong the ability for older adults to live at home independently has become an important area of smart environment research. In this proposal, we demonstrate a web-based visualization system (CASASviz) that integrates monitoring, analysis, and automated recognition of residents behavior patterns in smart environments. In our data collection module, we collect real sensor data from the CASAS smart apartment testbed. For our data adapter, we translate the raw data to various compatible formats for different visualization applications. In our visualization application module, we visualize resident behavior graphs that allow users to understand their behavior patterns in our smart environments.

关键词： data visualization Heating Image color analysis Feature extraction Smart homes Middleware Monitoring

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Combined vs. Separate Views in Matrix-based Graph analysis and Comparison

Combined vs. Separate Views in Matrix-based Graph Analysis a...

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International conference on Information Visualisation (IV)

作者： Alan G. Melville Martin Graham Jessie B. Kennedy School of Computing Edinburgh Napier University Edinburgh UK

While much work has been done in the area of visualization for analysis of graphs, relatively little research exists into how best to use visualization for comparing graphs. We have developed a suite of general graph comparison questions that can be tailored to specific data sets, and compared the use of superimposed and juxtaposed views of graph matrices on an example data set. Our observations indicate that combined views are more useful in comparing general graphs, allowing for greater user accuracy in determining differences and their effects.

关键词： Transmission line matrix methods visualization data visualization Games Accuracy Ontologies Sparse matrices

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"Life Portal": An Information Access Scheme Based on Life Logs

"Life Portal": An Information Access Scheme Based on Life Lo...

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Symposium on Human Interface/14th International conference on Human-Computer Interaction (HCI)

作者： Eitoku, Shin-ichiro Motegi, Manabu Mochizuki, Rika Yagi, Takashi Muto, Shin-yo Abe, Masanobu NTT Corp 1-1 Hikari No Oka Yokosuka Kanagawa 2390847 Japan Okayama Univ Kita Ku Okayama 7008530 Japan

ISBN: (纸本)9783642216688;9783642216695

In this paper, we propose a life log viewer that gives the users new findings from life logs in daily life, and provides seamless integration with external information. We classify life logs into two types. "Unintended life logs" are recorded automatically without the user's direct input;"intended life logs" are recorded purposefully by the user. Based on this classification, we implement a prototype that has two characteristics. First, it can visualize a user's unintended life log from long-term and multi-dimensional points of view. Second, its user interface is designed to visualize the transitions from the analysis results of the unintended life log to event data in the intended life log, and from event data in the intended life log to search results that provide information about the events. We believe that this viewer is a stepping-stone to the "Life Portal" that integrates existing portals with life log analysis to create a stimulus for search initiation.

关键词： Life log visualization Scheduler E-mail GPS

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Theory and Practice of Computer Graphics 2011, TPCG 2011 - Eurographics UK Chapter Proceedings

Theory and Practice of Computer Graphics 2011, TPCG 2011 - E...

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9th Theory and Practice of Computer Graphics conference, TPCG 2011

ISBN: (纸本)9783905673838

The proceedings contain 19 papers. The topics discussed include: terrain models for mass movement erosion;morphological analysis from images of hyphal growth using a fractional dynamic model;memory efficient surface reconstruction based on self organizing maps;pixel-level algorithms for drawing curves;building a video wall for earth observation data;dynamic video face transformation using multilinear and autoregressive models;visualization of blockplay in early childhood;airborne ultrasound pulse force device for palpation simulation;simple and efficient normal encoding with error bounds;a low-cost single-pixel thermographic camera;interactive computer visualizations of time and place;model and visualize the relationship between energy consumption and temperature distribution in cold rooms;visual saliency for smell impulses and application to selective rendering;and advantages of 3D extraction and spatial awareness within a videoconferencing environment.

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Interactive image fusion in distributed visualization environments

Interactive image fusion in distributed visualization enviro...

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IEEE conference on Aerospace

作者： So Yamaoka Kevin Ponto Kai-Uwe Doerr Falko Kuester Calit2 Center of Graphics Visualization and Virtual Reality (GRAVITY) University of California San Diego La Jolla CA USA

This paper presents an immediate-mode, integrated approach to image fusion and visualization of multi-band satellite data, drawing from the computational resources of networked, high-resolution, tiled display environments. The presented workflow enables researchers to intuitively and interactively experiment with all tunable parameters, exposed through external devices such as MIDI controllers, to rapidly modify the image processing pipeline and resulting visuals. This presented approach demonstrates significant savings across a set of case studies, with respect to overall data footprint, processing and analysis time complexity.

关键词： data visualization Image fusion Image resolution Satellites Image color analysis Pixel

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Classification of Intended Motor Movement using Surface EEG Ensemble Empirical Mode Decomposition

Classification of Intended Motor Movement using Surface EEG ...

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33rd Annual International conference of the IEEE Engineering-in-Medicine-and-Biology-Society (EMBS)

作者： Kuo, Ching-Chang Lin, William S. Dressel, Chelsea A. Chiu, Alan W. L. Louisiana Tech Univ Biomed Engn Program Ruston LA 71270 USA

ISBN: (纸本)9781424441228

Noninvasive electroencephalography (EEG) brain computer interface (BCI) systems are used to investigate intended arm reaching tasks. The main goal of the work is to create a device with a control scheme that allows those with limited motor control to have more command over potential prosthetic devices. Four healthy subjects were recruited to perform various reaching tasks directed by visual cues. Independent component analysis (ICA) was used to identify artifacts. Active post parietal cortex (PPC) activation before arm movement was validated using EEGLAB. Single-trial binary classification strategies using support vector machine (SVM) with radial basis functions (RBF) kernels and Fisher linear discrimination (FLD) were evaluated using signal features from surface electrodes near the PPC regions. No significant improvement can be found by using a nonlinear SVM over a linear FLD classifier (63.65% to 63.41% accuracy). A significant improvement in classification accuracy was found when a normalization factor based on visual cue "signature" was introduced to the raw signal (90.43%) and the intrinsic mode functions (IMF) of the data (93.55%) using Ensemble Empirical Mode Decomposition (EEMD).

关键词： Accuracy Brain Classification algorithms EEGLAB Educational institutions Electroencephalography Fisher linear discrimination ICA Support vector machines visualization biomedical electrodes brain computer interface brain-computer interfaces electroencephal

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Bringing the Home into the Hospital: Assisting the Pre-Discharge Home Visit Process Using 3D Home visualization Software

Bringing the Home into the Hospital: Assisting the Pre-Disch...

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6th International conference on Universal Access in Human-Computer Interaction (UAHCI)/14th International conference on Human-Computer Interaction (HCI)

作者： Money, Arthur G. McIntyre, Anne Atwal, Anita Spiliotopoulou, Georgia Elliman, Tony French, Tim Univ Bedfordshire Pk Sq Luton LU1 3JU Beds England Brunel Univ Uxbridge UB8 3PH Middx England

ISBN: (纸本)9783642216565;9783642216572

The feasibility of using interactive 3D home visualization software (I3DHVS) as a tool to aid Occupational Therapists (OTs) in carrying out pre-discharge home visits (PDHV) is explored. Three focus groups involving 25 OTs from across the UK were carried out. Participants were asked to report their level of experience with Information Technology (IT) and gaming software. After a demonstration of the I3DHVS OTs were asked to discuss where, when, how and by whom this software may potentially be used, and to identify associated strengths, weaknesses, opportunities and threats (SWOT) of use within the specified contacts. A thematic template analysis was then carried out on the transcribed focus group data which focused on two key Technology Acceptance Model (TAM) criteria which mediate users' behavioral intention and actual use of new technologies: (1) the Perceived Usefulness (PU) of the software within the PDHV process;(2) the Perceived Ease of Use (PEoU) of the software. The results revealed that although a number of adaptations to the existing application may be necessary, OTs are optimistic about the use of I3DHVS with a range of patient groups. The tool was also seen to have the potential to improve communication and collaboration across inter-agency care teams.

关键词： Three dimensional computer graphics

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