检索结果-内蒙古大学图书馆

World Haptics Conference

作者： Miguel A. Otaduy Markus Gross Computer Graphics Laboratory Swiss Federal Institute of Technology Switzerland

Transparent haptic rendering of the contact between a tool and its environment requires very frequent update of the contact forces acting on the tool. Given a rigid tool and a deformable environment, we define contact constraints by solving a constrained dynamic simulation problem, typically at a low update rate. A generalized contact Jacobian defines velocities at the constraints given the velocity of the rigid tool. We define an inverse of the contact Jacobian that is dynamically consistent with the constraints and, once we know other forces acting on the rigid tool, it allows a fast update of the accumulated contact forces, and thereby highly transparent rendering

关键词： Haptic interfaces Deformable models Yarn Rendering (computer graphics) Jacobian matrices Computational modeling Virtual environment computer graphics Manipulator dynamics Surgery

来源：评论

学校读者我要写书评

暂无评论

Robust Local Features and their Application in Self-Calibration and Object Recognition on Embedded Systems

Robust Local Features and their Application in Self-Calibrat...

引用

Conference on computer Vision and Pattern Recognition (CVPR)

作者： Clemens Arth Christian Leistner Horst Bischof Institute for Computer Graphics and Vision Graz University of Technology Graz Austria

In recent years many powerful computer vision algorithms have been invented, making automatic or semiautomatic solutions to many popular vision tasks, such as visual object recognition or camera calibration, possible. On the other hand embedded vision platforms and solutions such as smart cameras have successfully emerged, however, only offering limited computational and memory resources. The first contribution of this paper is the investigation of a set of robust local feature detectors and descriptors for application on embedded systems. We briefly describe the methods involved, i.e. the DoG (difference of Gaussian) and MSER (maximally stable extremal regions) detector as well as the PCA-SIFT descriptor, and discuss their suitability for smart systems and their qualification for given tasks. The second contribution of this work is the experimental evaluation of these methods on two challenging tasks, namely fully embedded object recognition on a moderate size database and on the task of robust camera calibration. Our approach is fortified by encouraging results we present at length.

关键词： Robustness Object recognition Embedded system computer vision Calibration Detectors Application software Smart cameras Embedded computing Qualifications

来源：评论

学校读者我要写书评

暂无评论

Teaching beyond sustainable awareness: Graduating leed-accredited professionals

Teaching beyond sustainable awareness: Graduating leed-accre...

引用

114th Annual ASEE Conference and Exposition, 2007

作者： Kilmer, Rosemary Kilmer, Lisa Purdue University United States Department of Visual and Performing Arts Council of Interior Design Accreditation Department of Computer Graphics Technology Interior Design Program Purdue University 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

Real-Time License Plate Recognition on an Embedded DSP-Platform

Real-Time License Plate Recognition on an Embedded DSP-Platf...

引用

Conference on computer Vision and Pattern Recognition (CVPR)

作者： Clemens Arth Florian Limberger Horst Bischof Institute for Computer Graphics and Vision Graz University of Technology Graz Austria

In this paper we present a full-featured license plate detection and recognition system. The system is implemented on an embedded DSP platform and processes a video stream in real-time. It consists of a detection and a character recognition module. The detector is based on the AdaBoost approach presented by Viola and Jones. Detected license plates are segmented into individual characters by using a region-based approach. Character classification is performed with support vector classification. In order to speed up the detection process on the embedded device, a Kalman tracker is integrated into the system. The search area of the detector is limited to locations where the next location of a license plate is predicted. Furthermore, classification results of subsequent frames are combined to improve the class accuracy. The major advantages of our system are its real-time capability and that it does not require any additional sensor input (e.g. from infrared sensors) except a video stream. We evaluate our system on a large number of vehicles and license plates using bad quality video and show that the low resolution can be partly compensated by combining classification results of subsequent frames.

关键词： Licenses Streaming media Real time systems Detectors Infrared sensors Digital signal processing Character recognition Kalman filters Sensor systems Vehicles

来源：评论

学校读者我要写书评

暂无评论

Object Reacquisition and Tracking in Large-Scale Smart Camera Networks

Object Reacquisition and Tracking in Large-Scale Smart Camer...

引用

ACM/IEEE International Conference on Distributed Smart Cameras, ICDSC

作者： Clemens Arth Christian Leistner Horst Bischof Institute for Computer Graphics and Vision Graz University of Technology Graz Austria

Object reacquisition or reidentification is the process of matching objects between images taken from separate cameras. In this paper, we present our work on feature based object reidentification performed on autonomous embedded smart cameras and applied to traffic scenarios. We present a novel approach based on PCA-SIFT features and a vocabulary tree. By building unique object signatures from visual features, reidentification can be done efficiently coevally minimizing the communication overhead between separate camera nodes. Applied to large-scale traffic scenarios, important parameters including travel time, travel time variability, section density, and partial dynamic origin/destination demands can be obtained. The proposed approach works on spatially separated, un-calibrated, non-overlapping cameras, is highly scalable and solely based on appearance-based optical features. The entire system is implemented and evaluated with regard to a typical embedded smart camera platform featuring one single Texas Instruments™ fixed-point DSP.

关键词： Large-scale systems Smart cameras Vehicles Vocabulary Traffic control Fingerprint recognition Robustness Telecommunication traffic Computational modeling computer vision

来源：评论

学校读者我要写书评

暂无评论

Implementing a database-driven solution for nominations and elections of faculty governance committees

Implementing a database-driven solution for nominations and ...

引用

114th Annual ASEE Conference and Exposition, 2007

作者： Acheson, Douglas Acheson, Lingma Indiana University Purdue University-Indianapolis United States Department of Computer Graphics Technology Purdue School of Engineering and Technology Indianapolis IN United States Computer Network Center Purdue School of Engineering and Technology Indianapolis United States School of Liberal Arts Butler University United States School of Science Purdue University Indianapolis United States

Institutions of higher education are self-governing bodies of which participating members must serve on various committees from time to time. To this end, nominations and elections of schoolwide committees are the vital link to this process of faculty governance. With each new academic year, there are numerous changes in faculty status such as new faculty being hired, tenure status, past positions being held and term limits on various committees. Depending on the complexity of each institution's governing document (which states the stipulations for each committee's required representation), making certain nominations and elections are carried out in a fair and equitable manner can prove to be a fairly daunting task. To streamline this yearly task and ensure continuity between former and current election committees, the authors of this paper developed a technology-based system which automates the nomination/election process. This paper presents an overview of this on-line, database-driven committee nomination and election system. This paper also points out several other institutions that have developed similar automated means of dealing with faculty governance logistics and presents issues that must be addressed when considering developing this type of a system. © American Society for Engineering Education, 2007.

关键词： Engineering education

来源：评论

学校读者我要写书评

暂无评论

Fingerprint Template Compression by Solving a Minimum Label k‐Node Subtree Problem

引用

AIP Conference Proceedings 2007年第1期936卷 444-447页

作者： Günther R. Raidl Andreas Chwatal Institute of Computer Graphics and Algorithms Vienna University of Technology Favoritenstrasse 9‐11/186 1040 Vienna Austria

We present a new approach for strongly compressing a relatively small amount of poorly structured data, as is required when embedding fingerprint template information in images of ID‐cards by means of watermarking techniques. The approach is based on the construction of a directed tree spanning a selected part of the data points and a codebook of template arcs used for a compact encoding of relative point positions. The selection of data points, the tree structure, and the codebook are simultaneously optimized by a new exact branch‐and‐cut approach or, alternatively, a faster greedy randomized adaptive search procedure (GRASP) to maximize compression. Experiments indicate that the new method can encode the required information in less space than several standard compression algorithms.

关键词：

来源：评论

学校读者我要写书评

暂无评论

A comparision of Model-based methods for knee cartilage segmentation

A comparision of Model-based methods for knee cartilage segm...

引用

2nd International Conference on computer Vision Theory and Applications, VISAPP 2007

作者： Cheong, J. Faggian, N. Langs, G. Suter, D. Cicuttini, F. Dept. of Electrical Dept. of Computer Systems Engineering Monash University Australia Clayton School of Information Technology Monash University Australia Institute for Computer Graphics and Vision Graz University of Technology Austria Pattern Recognition and Image Processing Group Vienna University of Technology Austria Dept. of Epidemiology Dept. of Preventive Medicine Monash University Australia

Osteoarthritis is a chronic and crippling disease affecting an increasing number of people each year. With no known cure, it is expected to reach epidemic proportions in the near future. Accurate segmentation of knee cartilage from magnetic resonance imaging (MRI) scans facilitates the measurement of cartilage volume present in a patient's knee, thus enabling medical clinicians to detect the onset of osteoarthritis and also crucially, to study its effects. This paper compares four model-based segmentation methods popular for medical data segmentation, namely Active Shape Models (ASM) (Cootes et al., 1995), Active Appearance Models (AAM) (Cootes et al., 2001), Patch-based Active Appearance Models (PAAM) (Faggian et al., 2006), and Active Feature Models (AFM) (Langs et al., 2006). A comprehensive analysis of how accurately these methods segment human tibial cartilage is presented. The results obtained were benchmarked against the current "gold standard" (cartilage segmented manually by trained clinicians) and indicate that modeling local texture features around each landmark provides the best results for segmenting human tibial cartilage.

关键词： Medical imaging

来源：评论

学校读者我要写书评

暂无评论

Search in speech, language identification and speaker recognition in Speech@FIT

Search in speech, language identification and speaker recogn...

引用

International Conference on Radioelektronika

作者： Jan Cernocky Lukas Burget Petr Schwarz Pavel Matejka Martin Karafiat Ondrej Glembek Jiri Kopecky Igor Szoke Michal Fapso Frantisek Grezl Valiantsina Hubeika Ilya Oparin Speech@FIT Department of Computer Graphics and Multimedia Faculty of Information Technology Brno University of Technology Czech Republic

ISBN: (纸本)1424408210

This paper describes "search in speech" techniques developed in the Speech@FIT research group at FIT BUT in the last couple of years. It concentrates on spoken term detection (STD) and presents our system for NIST STD 2006 evaluations in detail. It also briefly mentions our systems for speaker and language recognition.

关键词： Natural languages Speaker recognition Speech processing Speech recognition Humans Mobile communication Telephony Personnel Security Vocabulary

来源：评论

学校读者我要写书评

暂无评论

Sparse MRF appearance models for fast anatomical structure localisation

Sparse MRF appearance models for fast anatomical structure l...

引用

2007 18th British Machine Vision Conference, BMVC 2007

作者： Donner, René Mičušsík, Branislav Langs, Georg Bischof, Horst Institute for Computer Graphics and Vision Graz University of Technology Austria Pattern Recognition and Image Processing Group Vienna University of Technology Austria GALEN Group Laboratoire de Mathématiques Appliquées Aux Systèmes Ecole Centrale de Paris France

ISBN: (纸本)1901725340

Image segmentation methods like active shape models, active appearance models or snakes require an initialisation that guarantees a considerable overlap with the object to be segmented. In this paper we present an approach that localises anatomical structures in a global manner by means of Markov Random Fields (MRF). It does not need initialisation, but finds the most plausible match of the query structure in the image. It provides for precise, reliable and fast detection of the structure and can serve as initialisation for more detailed segmentation steps. Sparse MRF Appearance Models (SAMs) encode a priori information about the geometric configurations of interest points, local features at these points and local features along the edges of adjacent points. This information is used to formulate a Markov Random Field and the mapping of the modeled object (e.g. a sequence of vertebrae) to the query image interest points is performed by the MAX-SUM algorithm. The local image information is captured by novel symmetry-based interest points and local descriptors derived from Gradient Vector Flow. Experimental results are reported for two data-sets showing the applicability to complex medical data.

关键词： Image segmentation

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：