检索结果-内蒙古大学图书馆

作者： Pérez, Alberto Morell Risquet, Carlos Pérez Gómez, Jorge Marx Department of Computer Science Computer Graphics Laboratory Central University of Las Villas Santa Clara Cuba Department of Computing Science Business Information Systems I / VLBA Carl von Ossietzky University Oldenburg Oldenburg Germany

ISBN: (纸本)9789728939229

One purpose of the Top Level Visualization Ontology is to provide a common vocabulary to describe visualization data, processes, and products. However, there are two aspect where its expressiveness is poor: the models of the visualization process and the data used on it. The aim of this paper is to describe some modifications of this ontology which lead to a better representation of the visualization process and data models, and facilitate the accommodation of new models. A detailed description of the new ontology's components is given. © 2010 IADIS.

关键词： Visualization

来源：评论

学校读者我要写书评

暂无评论

RETRACTED ARTICLE: Document image analysis: issues, comparison of methods and remaining problems

引用

Artificial Intelligence Review 2010年第2期35卷 101-118页

作者： T. Saba G. Sulong A. Rehman Department of Computer Graphics and Multimedia Faculty of Computer Science and Information Systems Universiti Technologi Malaysia Skudai Johor Malaysia

Image analysis is an interesting research area with a large variety of challenging applications. Researchers have worked from decades on this topic, as witnessed by the scientific literature. However, document image analysis is the special case in image analysis as their spatial properties are different from natural images. Therefore, the main focus of this paper is to describe image denoising issues in general and document image issues in particular. Since the field of document processing is relatively new, it is also dynamic, so current methods have room for improvement and innovations are still being made. Several algorithms proposed in the literature are described. Critical discussions are reported about the current status of the field and open problems are highlighted. It is also demonstrated that, there are rarely definitive techniques for all cases of a certain problem. We surveyed the state of art, analyzed recent trends and tried to identify challenges for future research in this field.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Victim alignment in crosstalk-aware timing analysis

Victim alignment in crosstalk-aware timing analysis

引用

作者： Gandikota, Ravikishore Chopra, Kaviraj Blaauw, David Sylvester, Dennis Department of Electrical Engineering and Computer Science University of Michigan Ann Arbor MI 48105 United States Mentor Graphics San Jose CA 95131-2314 United States

Modeling the effect of coupling-noise on circuit delay is a key issue in static timing analysis and involves the victim-aggressor alignment problem. As delay-noise strongly depends on the skew between the victim-aggressor driver input transitions, it is not possible a priori identify the victim-driver input transition that results in the worst-case delay-noise. Several approaches have been proposed in literature which heuristically search for the worst-case victim-aggressor alignment. This paper presents an analytical result that obviates the need to search for the optimal victim-driver input transition, thereby simplifying the victim-aggressor alignment problem significantly. Using the properties of standard nonlinear complementary metal-oxide semiconductor drivers, it is shown that for monotonic input transitions the worst-case victim-driver input transition is the one that switches at the latest point in its timing window. Similarly, the victim-driver input alignment at the earliest point in the timing window is optimal for early-mode analysis. Although this result has been empirically observed in the industry, to the best of our knowledge this is the first paper which provides a rigorous analysis and shows that the above result holds for both linear and nonlinear drivers. It is also shown that the latest alignment of the victim-driver input transition results in the latest victim receiver output arrival time even for the cases where the victim is coupled to multiple aggressors. Finally, experimental results show that limiting the alignment of the victim to only the latest victim-driver input transition can significantly reduce the runtime of existing approaches with no loss of accuracy. © 2010 IEEE.

关键词： computer aided design

来源：评论

学校读者我要写书评

暂无评论

Facetouch: An innovative way to feel sensation of avatar emotional expression through sense of touch and facial appearance

Facetouch: An innovative way to feel sensation of avatar emo...

引用

21st IASTED International Conference on Modelling and Simulation, MS 2010

作者： Basori, Ahmad Hoirul Bade, Abdullah Sunar, Mohd. Shahrizal Daman, Daut Saari, Nadzari Department of Computer Graphics and Multimedia Faculty of Computer Science and Information Systems Skudai Johor Darul Takzim 81310 Malaysia School of Engineering and Information Technology Universiti Malaysia Sabah Locked Bag No. 2073 88999 Kota Kinabalu Sabah Malaysia

ISBN: (纸本)9780889868526

Current and existing avatars are only able to express their emotional expressions only by using facial animation, gesture and voice. Yet, only few researchers successfully combined haptic tactile with human emotion expression. In this paper, we present an avatar in a creative way that can gain user attention while they play game and use computer. Our proposed technique is achieved through combination of visual sense and systematic mapping of sense of touch. The mapping procedure is developed by systemically map the emotion layer into color spectrum based on the standard color emotion theories. To prove our solution, we benchmark our proposed technique prototype with existing system like Alfred. From the conducted experiment, we found that 57% respondents feel strong expression of virtual head emotion expression when dedicated haptic device stimulates their sensory nerve. Using our design solution, we can see that psychological signal can be adapted with vibration characteristic.

关键词： Color

来源：评论

学校读者我要写书评

暂无评论

Road Network Reconstruction for Organizing Paths 10

Road Network Reconstruction for Organizing Paths

引用

Annual ACM-Society for Industrial and Applied Mathmatics Symposium on Discrete Algorithms

作者： Daniel Chen Leonidas J. Guibas John Hershberger Jian Sun Computer Science Department Stanford University Mentor Graphics Corp.

ISBN: (纸本)9780898717013

We consider the problem of reconstructing a road network from a collection of path traces and provide guarantees on the accuracy of the reconstruction under reasonable assumptions. Our algorithm can be used to process a collection of polygonal paths in the plane so that shared structures (subpaths) among the paths in the collection can be discovered and the collection can be organized to allow efficient path similarity queries against new query paths on the same road network. This is a timely problem, as GPS and other location traces of both people and vehicles are becoming available on a large scale and there is a real need to create appropriate data structures and data bases for such data.

关键词： road network Paths Byways Data structures collection Reconstructive Surgical Procedures organizing Global Positioning Systems plane Platanus hybrida Reconstructions

来源：评论

学校读者我要写书评

暂无评论

A multi-touch enabled human-transporter metaphor for virtual 3D traveling

A multi-touch enabled human-transporter metaphor for virtual...

引用

IEEE Symposium on 3D User Interfaces (3DUI)

作者： Dimitar Valkov Frank Steinicke Gerd Bruder Klaus Hinrichs Visualization and Computer Graphics (VisCG) Research Group Department of Computer Science University of Münster Munster Germany

ISBN: (纸本)9781424468461;9781424468447

In this tech-note we demonstrate how multi-touch hand gestures in combination with foot gestures can be used to perform navigation tasks in interactive 3D environments. Geographic Information Systems (GIS) are well suited as a complex testbed for evaluation of user interfaces based on multi-modal input. Recent developments in the area of interactive surfaces enable the construction of low-cost multi-touch displays and relatively inexpensive sensor technology to detect foot gestures, which allows to explore these input modalities for virtual reality environments. In this tech-note, we describe an intuitive 3D user interface metaphor and corresponding hardware, which combine multi-touch hand and foot gestures for interaction with spatial data.

关键词： Navigation Foot Legged locomotion User interfaces Geographic Information Systems Virtual reality Visualization computer graphics computer science System testing

来源：评论

学校读者我要写书评

暂无评论

Immersive virtual studio for architectural exploration

Immersive virtual studio for architectural exploration

引用

IEEE Symposium on 3D User Interfaces (3DUI)

作者： Gerd Bruder Frank Steinicke Dimitar Valkov Klaus Hinrichs Visualization and Computer Graphics (VisCG) Research Group Department of Computer Science University of Münster Munster Germany

ISBN: (纸本)9781424468461;9781424468447

Architects use a variety of analog and digital tools and media to plan and design constructions. Immersive virtual reality (VR) technologies have shown great potential for architectural design, especially for exploration and review of design proposals. In this work we propose a virtual studio system, which allows architects and clients to use arbitrary real-world tools such as maps or rulers during immersive exploration of virtual 3D models. The user interface allows architects and clients to review designs and compose 3D architectural scenes, combining benefits of mixed-reality environments with immersive head-mounted display setups.

关键词： Virtual reality User interfaces Layout Cameras computer graphics Legged locomotion Laboratories computer displays Three dimensional displays Process design

来源：评论

学校读者我要写书评

暂无评论

A novel semi-blind-and-semi-reversible robust watermarking scheme for 3D polygonal models

A novel semi-blind-and-semi-reversible robust watermarking s...

引用

作者： Lin, Chao-Hung Chao, Min-Wen Liang, Chan-Yu Lee, Tong-Yee Department of Geomatics National Cheng-Kung University No. 1 Ta-Hsueh Road Tainan 701 Taiwan Computer Graphics Group/Visual System Laboratory Department of Computer Science and Information Engineering National Cheng-Kung University No. 1 Ta-Hsueh Road Tainan 701 Taiwan

We introduce a novel semi-blind-and-semireversible robust watermarking scheme for three-dimensional (3D) polygonal models. The proposed approach embeds watermarks in the significant features of 3D models in a spread-spectrum manner. This novel scheme is robust against a wide variety of attacks including rotation, translation, scaling, noise addition, smoothing, mesh simplifications, vertex reordering, cropping, and even pose deformation of meshes. To the best of our knowledge, the existing approaches including blind, semi-blind, and non-blind detection schemes cannot withstand the attack of pose editing, which is a very common routine in 3D animation. In addition, the watermarked models can be semi-reversed (i.e., the peak signal-to-noise ratio (PSNR) of the recovered models is greater than 90 dB in all experiments) in semi-blind detection scheme. Experimental results show that this novel approach has many significant advantages in terms of robustness and invisibility over other state-of-the-art approaches. © Springer-Verlag 2010.

关键词： Watermarking

来源：评论

学校读者我要写书评

暂无评论

Perceptual issues in augmented reality revisited

Perceptual issues in augmented reality revisited

引用

International Symposium on Mixed and Augmented Reality (ISMAR)

作者： Ernst Kruijff J. Edward Swan Steven Feiner Institute of Computer Graphics and Vision Graz University of Technology Austria Department of Computer Science and Engineering Mississippi State University USA Department of Computer Science Columbia University USA

This paper provides a classification of perceptual issues in augmented reality, created with a visual processing and interpretation pipeline in mind. We organize issues into ones related to the environment, capturing, augmentation, display, and individual user differences. We also illuminate issues associated with more recent platforms such as handhelds or projector-camera systems. Throughout, we describe current approaches to addressing these problems, and suggest directions for future research.

关键词： Image color analysis Lenses Cameras Visualization Lighting Adaptive optics Object segmentation

来源：评论

学校读者我要写书评

暂无评论

computer Generated Caricature: A Survey

Computer Generated Caricature: A Survey

引用

International Conference on Cyberworlds

作者： Suriati Bte Sadimon Mohd Shahrizal Sunar Dzulkifli Mohamad Habibollah Haron ViCubeLaboratory Department of Computer Graphics and Multimedia Faculty of Computer Science and Information System Universiti Teknologi Malaysia Johor Malaysia

Caricature is a pictorial representation of a person or subject in summarizing way by exaggerating the most distinctive features and simplifies the common features in order to make that subject different from others and at the same time, preserve the likeness of the subject. computer Generated Caricature is developed in order to assist the user in producing caricature automatically or semi-automatically. It is derived from the rapid advance in computer graphics and computer vision and introduced as a part of computer graphics' non-photo realistic rendering technologies as well. Recently, computer Generated Caricature becomes particularly interesting research topic due to the advantageous features of privacy, security, simplification, amusement and their explosive emergent real-world application such as in magazine, digital entertainment, Internet and mobile application. On the basis of the previous facts, this paper surveys the uses of caricature in variety of applications, theories and rules in the art of drawing caricature, how these theories are simulated in the development of caricature generation system and the current research trend in this field. computer generated caricature can be divided into two main categories based on their input data type: human centered approach and image processing approach. Next, process of generating caricature from input photo is explained briefly. It also reported the state of the art techniques in generating caricature by classifying it into four approaches: interactive, regularity-based, learning-based and predefined database of caricature illustration. Lastly, this paper will discuss relevant issues, problems and several promising direction of future research.

关键词： Face Facial features Feature extraction Face recognition computers Pragmatics Visualization

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：