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Proceedings of the Seventh Indian conference on computer Vision, graphics and Image Processing

作者： Kotwal, Ketan Chaudhuri, Subhasis Electrical Engineering Department Indian Institute of Technology Bombay Mumbai India

ISBN: (纸本)9781450300605

The fusion of hyperspectral images is an important area in research and applications. Several fusion techniques have been developed in the literature for visualization of hyper-spectral data. The amount of computation needed for such techniques is directly related to the volume of the data. Most of these techniques involve a significant amount of computation due to high volume of the data, making the fusion processes slow. We analyze the statistical characteristics of this data in order to develop a technique for faster fusion. The image bands in the hyperspectral data represent the response of the scene collected over contiguous narrow bands of wavelength. The adjacent bands being captured over neighboring wavelength bands, these images exhibit a very high degree of similarity. The fusion of these adjacent image bands, thus adds a very little amount of additional information. We exploit this redundancy in the data to provide a novel scheme for rapid visualization. We propose a scheme for the selection of a subset of images from a hyper-spectral image cube that can produce fusion results with a very small amount of degradation in the quality compared to the quality of the result using the same technique of fusion applied over the entire data. © 2010 ACM.

关键词： visualization

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Medical Image Computing and computer-Assisted Intervention – MICCAI 2006 1

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丛书名： Lecture Notes in computer Science

1000年

作者： Rasmus Larsen Mads Nielsen Jon Sporring

ISBN: (数字)9783540447283

ISBN: (纸本)9783540447276

The 9th international conference on Medical Image Computing and computer Assisted Intervention, MICCAI 2006, was held in Copenhagen, Denmark at the Tivoli Concert Hall with satellite workshops and tutorials at the IT University of Copenhagen, October 1-6, 2006. The conference has become the premier international conference with - depth full length papers in the multidisciplinary ?elds of medical image c- puting, computer-assisted intervention, and medical robotics. The conference brings together clinicians, computer scientists, engineers, physicists, and other researchers and o?ers a forum for the exchange of ideas in a multidisciplinary setting. MICCAI papers are of high standard and have a long lifetime. In this v- ume as well as in the latest journal issues of Medical Image Analysis and IEEE Transactions on Medical imaging papers cite previous MICCAIs including the ?rst MICCAI conference in Cambridge, Massachusetts, 1998. It is obvious that the community requires the MICCAI papers as archive material. Therefore the proceedingsofMICCAIarefrom2005andhenceforthbeing indexedbyMedline. Acarefulreviewandselectionprocesswasexecutedinordertosecurethebest possible program for the MICCAI 2006 conference. We received 578 scienti?c papers from which 39 papers were selected for the oral program and 193 papers for the poster program.

关键词： Image Processing and computer Vision Pattern Recognition computer graphics Artificial Intelligence imaging / Radiology Health Informatics

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Interface evaluation of Portuguese and international news websites

Interface evaluation of Portuguese and international news we...

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2007 IADIS international conference on Interfaces and Human computer Interaction, IHCI 2007, part of the 1st IADIS Multi conference on computer Science and Information Systems, MCCSIS 2007

作者： Nunes, Sérgio Almeida, André Giesteira, Bruno Pinto, Fernanda Oliveira, Paula FEUP/*** Universidade do Porto Rua Dr. Roberto Frias PortoSN 4200-465 Portugal FBAUP/*** Universidade do Porto Rua Dr. Roberto Frias PortoSN 4200-465 Portugal FLUP Universidade do Porto Rua Dr. Roberto Frias PortoSN 4200-465 Portugal

ISBN: (纸本)9789728924393

In this paper, we present an observational descriptive study of news websites, focusing on aspects related to interface design, accessibility and usability. Interface design was evaluated by measuring selected areas from web pages screenshots. As for the accessibility, automatic testing tools were used in the evaluation and analysis. Finally, a total of 145 user tests were conducted to evaluate overall usability. Our sample had a total of 30 websites, divided in both Portuguese and international websites. Contributions include a state of the art of news websites and a comparison between Portuguese and international websites in this area. © 2007 IADIS

关键词： Web Design

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4D-UX: User Experience Design Principles for Coupling Multidimensional Visual Representations in Presentations 22

4D-UX: User Experience Design Principles for Coupling Multid...

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22nd international conference Information Visualisation (IV) - Biomedical visualization, Visualisation on Built and Rural Environments and Geometric Modelling and imaging

作者： Burkhard, R. Perhac, J. Asada, S. Troyanov, A. Zhong, S. Jiang, Y. Schubiger, S. Singapore ETH Ctr FCL Singapore Singapore Univ Appl Sci & Arts Northwestern Switzerland FHN Sch Engn Inst 4D Technol Windisch Switzerland

ISBN: (纸本)9781538672020

This paper presents 4D User Experience design principles (4D-UX), as well as a software implementation and applications of how to communicate spatial and temporal data. The foundation is built on tightly coupling multiple dimensions into one application, adding a sequential story line and finally decluttering the front-end to enhance the emotional and cognitive functions of audiences. The framework suggests a combination of a sequential story-telling approach with 2D, 3D, 4D elements such as interactive sliders added to the flow of argumentation. With those design principles in place, the authors then present a software platform called "Singapore Views" based on the "Unity" game engine. The communication challenge of research groups that had to convey the insights on their studies about the "Urban Heat Island Effect" and "Dense and Green Building Typologies" in Singapore to a diverse group of stakeholders were taken as examples. The paper presents a multi-disciplinary approach with authors from computer science, architecture, design, communication, business administration and urban development. It contributes to the current discussion of how to visualize knowledge and plan future cities.

关键词： Urban Planning Knowledge visualization Design Principles Information visualization Future Cities Multiple Coordinated Views Storytelling Knowledge Communication Unity Singapore Views

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Simulation of imaging radar for obstacle avoidance and enhanced vision

Simulation of imaging radar for obstacle avoidance and enhan...

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conference on Enhanced and Synthetic Vision 1997

作者： Doehler, HU Bollmeyer, D DLR Institute fuer Flugmechanik (Germany)

ISBN: (纸本)0819425036

One of the main advantages of millimeter wave (MMW) imaging radar systems results from the fact that their imaging performance does nearly not depend on atmospheric effects such as fog, rain and snow. That is the reason that MMW radar seems to be one of the most promising sensors for enhanced vision systems (EVS), which can aid the pilot during approach, landing and taxiing, especially under bad weather conditions. Compared to other imaging devices (TV, IR etc.), MMW radar systems deliver a lower image resolution and update rate, and have a worse signal to noise ratio. Moreover, the commonly proposed method of the perspective view projection (''out the window view'') in EVS applications results in some imaging errors and artefacts. These sensor specific effects should be taken into account during the presently conducted EVS research and development. To get the opportunity of studying imaging radar systems in ground based research environments, we have developed a new type of a MMW radar sensor simulator. Our approach is based on detailed terrain and/or airport data bases, as they are available for normal visual simulations or VR applications. We have augmented these data bases with some specific attributes which describe object surface properties with respect to MMW. Our approach benefits from the state of the art of high speed computer graphics hard- and software (e.g. z-buffering, lighting, materials, texture mapping). It is implemented in C/C++ and uses the OpenGL graphic standard and the SGI Performer data base handler. It runs on every SGI graphic workstation, and achieves an image update rate of about 20 Hz, which is more than actual available radar systems deliver. One of the main advantages of our approach is, that it can be integrated easily in emergent multisensor based enhanced vision systems and it is a usefull tool for EVS research and development.

关键词： sensor simulation imaging radar computer graphics image processing

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Perinatal, Preterm and Paediatric Image Analysis 1

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丛书名： Lecture Notes in computer Science

1000年

作者： Daphna Link-Sourani Esra Abaci Turk Christopher Macgowan Jana Hutter Andrew Melbourne Roxane Licandro

This book constitutes the refereed proceedings of the 8th international Workshop on Perinatal, Preterm and Paediatric Image Analysis, PIPPI 2023, held in conjunction with the 26th international conference on Medical ... 详细信息

ISBN: (数字)9783031455445

ISBN: (纸本)9783031455438

关键词： computer imaging, Vision, Pattern Recognition and graphics Artificial Intelligence computer Applications

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One-sided transparency: A novel visualization for tubular objects

One-sided transparency: A novel visualization for tubular ob...

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作者： Curtin, Robert Ismail, Marwa Farag, Aly Sites, Chuck Elshazly, Salwa Falk, Robert Computer Vision and Image Processing Laboratory University of Louisville LouisvilleKY United States Kentucky Imaging Technologies LouisvilleKY United States Medical Imaging Jewish Hospital Abraham Flexner Way Louisville United States

ISBN: (纸本)9781479957514

This paper describes a unique method for tubular object visualization. The method involves rendering the exterior of the tube invisible while keeping the interior visible. This 'One-sided-transparency' technique renders a more complete view of the tube's interior. When applied to virtual colonoscopy (VC), it compares favorably to existing methods. It provides more complete images, reduces computational time, and reduces memory requirements while preserving VCs benefits for patients and practitioners. The approach also has various potential uses outside of VC. © 2014 IEEE.

关键词： Transparency

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An Effective Stratified Sampling Scheme for Environment Maps with Median Cut Method

An Effective Stratified Sampling Scheme for Environment Maps...

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international conference on computer graphics, imaging and visualization, CGIV

作者： Xing Mei M. Jaeger Baogang Hu LIAMA/NLPR Institute of Automation Chinese Academy and Sciences Beijing China Laboratoire AMAP CIRAD Montpellier France

Environment maps are extensively used as natural light sources in realistic rendering. We propose a stratified sampling scheme for environment maps by first stratifying the maps into a set of rectangular regions with median cut method, then estimating the contribution of the regions with Monte Carlo integration techniques. In this way, illumination, surface reflectance and spatial distribution are all taken into consideration for the generation of the light samples. Compared with the existing biased lighting techniques, the presented scheme produces unbiased rendering results with less noise and better shadow boundaries, particularly at low sampling rates. The proposed spatial distribution of the samples also helps to overcome the sample-clumping problem in traditional illumination-based importance sampling method. Experimental results indicate that the scheme is fast, simple to implement and effective

关键词： Sampling methods Monte Carlo methods Lighting Reflectivity Rendering (computer graphics) Noise reduction Automation Light sources Image sampling Image generation

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Ubiquitous medical volume rendering on mobile devices

Ubiquitous medical volume rendering on mobile devices

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2012 international conference on Information Society, i-Society 2012

作者： Mobeen, Movania Muhammad Feng, Lin School of Computer Engineering Nanyang Technological University Singapore 639798 Singapore

ISBN: (纸本)9781908320056

While multimedia communications are widely adopted, sophisticated graphic rendering technologies are demanded for e-medical applications. In this study, a single-pass volume rendering algorithm is developed for WebGL platform which is emerging as a standard platform for interactive graphics applications on all the mobile devices. We exploit this platform for efficient rendering of volumetric datasets, especially 3D medical images. A remarkable advantage of this approach is that, being interfaced by the OpenGL ES 2.0 shading API, it can directly run on most embedded and mobile devices such as smart phones and tablets. Technically, we propose a novel single-pass rendering pipeline, in contrast to the current WebGL volume rendering systems which use the multi-pass approach. The new pipeline can be implemented efficiently on the embedded GPU in the mobile device, enabling real-time visualization of high-resolution volumetric datasets. We also extend the pseudo-color shading by using custom transfer function widgets, which enables interactive feature enhancement in rendering. Extensive experimental results and performance assessments have been conducted, and a consistent 2x speedup against the current WebGL based volume rendering is achieved. © 2012 Infonomics Society.

关键词： graphics processing unit

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Integrated visualization of problemcentric urologic patient records

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TECHNIQUES IN BIOINFORMATICS AND MEDICAL INFORMATICS 2002年第1期980卷 267-277页

作者： Bui, AAT Taira, RK Churchill, B Kangarloo, H Univ Calif Los Angeles Telemed Div Dept Radiol Los Angeles CA 90024 USA Univ Calif Los Angeles Med Ctr Los Angeles CA 90024 USA

The collision of computer-based technologies and the medical environment is resulting in an increasingly electronic multimedia patient record, consisting of not only the traditional types of data (e.g., clinic notes and laboratory reports), but also digital images (e.g., computed tomography and magnetic resonance imaging) and other visual representations of patient data (e.g., pulmonary function graphs and urodynamic charts). Given the increasing amount of data made available to physicians, it is not only critical that the totality of a patient's medical record be accessible to a clinician, but that the diverse data be integrated and presented in a manner conducive to patient management: key information should be easily discovered. This paper describes a problemcentric time-based visualization of urologic conditions, whereby a patient's medical history is automatically organized around a medical problem and presented as a graphic chronology. Urology-related data in the patient medical record is organized in accord with an expert constructed knowledge-base, and plotted on a timeline using iconic representations. The user interface permits the physician to quickly view multimedia data and to visualize relationships between events in the patient's history.

关键词： urology patient data visualization graphic timelines

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