检索结果-内蒙古大学图书馆

Proceedings of the Fourth IASTED International Conference on visualization, Imaging, and Image Processing

作者： Le, Nhu Pochec, P.R. Ware, C. Communications Research Centre 3701 Carling Ave. Ottawa Canada Faculty of Computer Science University of New Brunswick Fredericton Canada Data Visualization Research Lab. University of New Hampshire Durham NH United States

ISBN: (纸本)0889864152

In this paper we introduce a new technique designed to optimize stereoscopic depth perception of small targets embedded in 3D scenes. Central to the technique is a modified version of an image processing algorithm originally designed for gray scale image enhancement. This has been adapted and modified to adjust the stereoscopic depth in a 3D scene while mostly preserving other depth cues such as perspective, texture gradients, size gradients and occlusion. An experimental study to evaluate the algorithm showed that enhanced stereoscopic depth can enable the detection of targets that would otherwise be missed.

关键词： Imaging techniques

来源：评论

学校读者我要写书评

暂无评论

Managing the Chicago transit authority's infrastructure using spatially referenced asset management

Managing the Chicago transit authority's infrastructure usin...

引用

Proceedings of the Eighth International Conference on Applications of Advanced Technologies in Transportaion Engineering

作者： Zhai, Dong Hammerle, Meghan Ramasubramanian, Laxmi Dirks, Lise McNeil, Sue Schiedel, Jason Abou-sabh, Sharif Urban Transportation Center University of Illinois at Chicago MC 357 412 S. Peoria St Chicago IL 60607 United States Urban Data Visualization Lab. University of Illinois at Chicago MC 357 412 S. Peoria St Chicago IL 60607 United States URS Corporation 120 North Racine Ave Chicago IL 60607 United States

The Chicago Transit Authority (CTA) is the second largest transit agency in the United States. Sections of this rail system are over a hundred years old and both train stations and related infrastructure are aging. In order to effectively manage and maintain station assets, the agency has developed a systematic inventory of assets and conditions. This paper describes methods to access, query and display the data using a geographical information system (GIS) and relational databases, to facilitate both strategic and day-to-day decision-making.

关键词： Railroad transportation

来源：评论

学校读者我要写书评

暂无评论

An improved N-bit to N-bit reversible Haar-like transform

An improved N-bit to N-bit reversible Haar-like transform

引用

Pacific Conference on Computer Graphics and Applications

作者： J.G. Senecal P. Lindstrom M.A. Duchaineau K.I. Joy Inst. for Sci. Comput. Res. Lawrence Livermore Nat. Lab. CA USA Center for Applied Scientific Computing Lawrence Livemore National Laboratory USA Institute for Data Analysis and Visualization Computer Science Department University of California Davis USA

We introduce the piecewise-linear Haar (PLHaar) transform, a reversible n-bit to n-bit transform that is based on the Haar wavelet transform. PLHaar is continuous, while all current n-bit to n-bit methods are not, and is therefore uniquely usable with both lossy and lossless methods (e.g. image compression). PLHaar has both integer and continuous (i.e. non-discrete) forms. By keeping the coefficients to n bits PLHaar is particularly suited for use in hardware environments where channel width is limited, such as digital video channels and graphics hardware.

关键词： Wavelet transforms Continuous wavelet transforms Hardware Dynamic range Image coding Scientific computing Image reconstruction laboratories data analysis data visualization

来源：评论

学校读者我要写书评

暂无评论

Message from the Program Co-Chairs

Message from the Program Co-Chairs

引用

Proceedings - Graphics Interface 2003

作者： Moller, Torsten Ware, Colin Graphics Usability/Visualisation Lab School of Computing Science Simon Fraser University Canada Data Visualization Research Lab Center for Coastal and Ocean Mapping University of New Hampshire United States

No abstract available

关键词：

来源：评论

学校读者我要写书评

暂无评论

An evaluation of methods for linking 3D views 03

An evaluation of methods for linking 3D views

引用

ACM SIGGRAPH 2003 Symposium on Interactive 3D Graphics

作者： Plumlee, Matthew Ware, Colin Department of Computer Science University of New Hampshire Durham NH 03824 United States Data Visualization Research Lab. Center for Coastal and Ocean Mapping University of New Hampshire Durham NH 03824 United States

ISBN: (纸本)9781581136456

It is common for 3D visualization systems to provide multiple points of view to a user, but there have been many solutions to the problem of linking these views so that users can understand the spatial relationships between them. Toward developing guidelines for view-linking devices, we have carried out two experiments that compare the utility of three different classes of linking devices: a directional proxy, tethers from one view to another, and a track-up map coupling. The task we apply them to is what we call the multi-perspective identification task: subjects are asked to identify an item seen in a local, forward-looking view in the context of a global, overhead view. Our results indicate that the directional proxy is the most beneficial device, and that the track-up map coupling is also beneficial. The results suggest that tethers provide little benefit. The results also suggest that when multiple local views are present, it may be beneficial to emphasize one window as being of primary interest.

关键词： Three dimensional computer graphics

来源：评论

学校读者我要写书评

暂无评论

Moticons:

引用

International Journal of Human-Computer Studies 2003年第5期58卷 515-545页

作者： Lyn Bartram Colin Ware Tom Calvert Colligo Networks Inc. 2nd Floor 1071 Mainland Street Vancouver BC Canada V6B 5P9 Data Visualization Lab University of New Hampshire Durham NH 03824 USA School of Computing Science Simon Fraser University Burnaby BC V5A 1s6 Canada

In this paper, we describe an empirical investigation of the utility of several perceptual properties of motion in information-dense displays applied to notification. Notification relates to awareness and how dynamic information is communicated from the system to the user. Key to a notification technique is how easily the notification is detected and identified. Our initial studies show that icons with simple motions, termed moticons , are effective coding techniques for notification and in fact are often better detected and identified than colour and shape codes, especially in the periphery. A subsequent experiment compared the detection and distraction effects of different motion types in several task conditions. Our results reveal how different attributes of motion contribute to detection, identification and distraction and provide initial guidelines on how motion codes can be designed to support awareness in information-rich interfaces while minimizing unwanted side effects of distraction and irritation.

关键词： Notification user interfaces Motion Animated user interfaces Attention

来源：评论

学校读者我要写书评

暂无评论

Haptic interface for center-of-workspace interaction 10

Haptic interface for center-of-workspace interaction

引用

10th Symposium on Haptic Interfaces for Virtual Environment and Teleoperator Systems, HAPTICS 2002

作者： Komerska, Rick Ware, Colin Plumlee, Matthew Data Visualization Research Lab CCOM University of New Hampshire United States

ISBN: (纸本)0769514898

We build upon a new interaction style for 3D interfaces, called the center of workspace interaction. This style of interaction is defined with respect to a central fixed point in 3D space, conceptually within arm's length of the user. For demonstration, we show a haptically enabled fish tank VR that utilizes a set of interaction widgets to support rapid navigation within a large virtual space. The fish tank VR refers to the creation of a small but high quality virtual reality that combines a number of technologies, such as head-tracking and stereo glasses, to their mutual advantage. © 2002 IEEE.

关键词： Fish

来源：评论

学校读者我要写书评

暂无评论

Cognitive measurements of graph aesthetics

引用

Information visualization 2002年第2期1卷 103-110页

作者： Ware, Colin Purchase, Helen Colpoys, Linda McGill, Matthew Data Visualization Research Lab Durham United States School of Computer Science and Electrical Engineering University of Queensland Brisbane St Lucia 4072 Australia

A large class of diagrams can be informally characterized as node–link diagrams. Typically nodes represent entities, and links represent relationships between them. The discipline of graph drawing is concerned with methods for drawing abstract versions of such diagrams. At the foundation of the discipline are a set of graph aesthetics (rules for graph layout) that, it is assumed, will produce graphs that can be clearly understood. Examples of aesthetics include minimizing edge crossings and minimizing the sum of the lengths of the edges. However, with a few notable exceptions, these aesthetics are taken as axiomatic, and have not been empirically tested. We argue that human pattern perception can tell us much that is relevant to the study of graph aesthetics including providing a more detailed understanding of aesthetics and suggesting new ones. In particular, we find the importance of good continuity (ie keeping multi-edge paths as straight as possible) has been neglected. We introduce a methodology for evaluating the cognitive cost of graph aesthetics and we apply it to the task of finding the shortest paths in spring layout graphs. The results suggest that after the length of the path the two most important factors are continuity and edge crossings, and we provide cognitive cost estimates for these parameters. Another important factor is the number of branches emanating from nodes on the path. © 2002, SAGE Publications. All rights reserved.

关键词： aesthetics cognitive modeling Graph layout network visualization

来源：评论

学校读者我要写书评

暂无评论

Rivalry and Interference with a Head-Mounted Display

引用

ACM Transactions on Computer-Human Interaction 2002年第3期9.0卷 238-251页

作者： Laramee, Robert S. Ware, Colin VRVis-Research Center for Virtual Reality and Visualization Vienna Donau-City-Stresse 1 A-1220 Austria University of New Hampshire Data Visualization Research Lab Center for Coastal and Ocean Mapping NH Durham 03824 United States

Perceptual factors that affect monocular, transparent (a.k.a “see-thru”) head-mounted displays include binocular rivalry, visual interference, and depth of focus. We report the results of an experiment designed to evaluate the effects of these factors on user performance in a table look-up task. Two backgrounds were used. A dynamic moving background was provided by a large screen TV and an untidy bookshelf was used to provide a complex static *** the TV background large effects were found attributable to both rivalry and visual interference. These two effects were roughly additive. Smaller effects were found with the bookshelf. In conclusion we suggest that monocular transparent HMDs may be unsuitable for use in visually dynamic environments. However when backgrounds are relatively static, having a transparent display may be preferable to having an opaque display. © 2002, ACM. All rights reserved.

关键词： augmented reality binocular rivalry head-mounted display heads-up display Human Factors mobile computing devices see-thru Display visual interference Wearable computing

来源：评论

学校读者我要写书评

暂无评论

A method for the perceptual optimization of complex visualizations 02

A method for the perceptual optimization of complex visualiz...

引用

Working Conference on Advanced Visual Interfaces, AVI 2002

作者： House, Donald Ware, Colin Visualization Laboratory Texas A and M University College Station TX 77843-3137 United States Data Visualization Research Lab. Center for Coastal and Ocean Mapping University of New Hampshire Durham NH 03824 United States

ISBN: (纸本)1581135378

A common problem in visualization applications is the display of one surface overlying another. Unfortunately, it is extremely difficult to do this clearly and effectively. Stereoscopic viewing can help, but in order for us to be able to see both surfaces simultaneously, they must be textured, and the top surface must be made partially transparent. There is also abundant evidence that all textures are not equal in helping to reveal surface shape, but there are no general guidelines describing the best set of textures to be used in this way. What makes the problem difficult to perceptually optimize is that there are a great many variables involved. Both foreground and background textures must be specified in terms of their component colors, texture element shapes, distributions, and sizes. Also to be specified is the degree of transparency for the foreground texture components. Here we report on a novel approach to creating perceptually optimal solutions to complex visualization problems and we apply it to the overlapping surface problem as a test case. Our approach is a three-stage process. In the first stage we create a parameterized method for specifying a foreground and background pair of textures. In the second stage a genetic algorithm is applied to a population of texture pairs using subject judgments as a selection criterion. Over many trials effective texture pairs evolve. The third stage involves characterizing and generalizing the examples of effective textures. We detail this process and present some early results. © 2009 ACM.

关键词： Genetic algorithms

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：