检索结果-内蒙古大学图书馆

3D content-based visualization of databases

3D content-based visualization of databases

11th World Multi-conference on Systemics, Cybernetics and Informatics/13th International conference on Information systems Analysis and Synthesis

作者： Koutsoudis, Anestis Arnaoutoglou, Fotis Pavlidis, George Chamzas, Christodoulos Democritus Univ Thrace Dept Elect & Comp Engn 12 Vas Sofias Str GR-67100 Xanthi Greece Res Ctr Athena Cultural & Educ Technol Inst Xanthi 67100 Greece

ISBN: (纸本)9781934272176

The scope of this paper is to propose an innovative interactive system for 3D visualization of multimedia databases. In such databases, the digital content is accompanied by complementary information and metadata that describe the content. The proposed 3D visualization environment is able to provide multiscale representations driven by appropriate clustering processes that exploit content descriptions. It is also able to provide direct access to all the digital content, both in terms of physical access to the multimedia files as well as in terms of searching and retrieving information.

关键词： 3D graphical user interface 3D visualization content-based description content-based visualization

来源：评论

学校读者我要写书评

暂无评论

Early evaluation of future consumer AV content analysis applications with PC networks

引用

multimedia TOOLS AND APPLICATIONS 2007年第2期34卷 201-220页

作者： de Lange, Fons Nesvadba, Jan Philips Res Labs Eindhoven Netherlands

The paper deals with software productivity improvement for consumer multimedia devices by means of PC and component technology and shows how this is done for complex real-time content analysis applications used in advanced new storage products of the future. content analysis is a relatively new and immature technology. It is used for browsing and searching particular content items among thousands of others on "big" embedded storage devices like hard disks. As the storage capacity of hard disk and flash continues to grow rapidly, content analysis is bound to become a key enabling technology in future storage products. A major problem with content analysis features (and many other features as well) is that underlying algorithms are unstable, sometimes unavailable, or at least, very much in their infancy, and as such, subject to frequent changes. The paper describes an approach to facilitate early evaluation and integration of such immature features. This is done by packing each feature, as-is, into components and by providing PC network technology to interconnect them. In our prototyping framework, each component is an independent executable program that runs on some PC in the network, streaming AV data via TCP/IP and being controlled through UPnP networking. Experiences with large-scale prototyping activities we have carried out for the assessment of future content analysis systems, show that a PC based prototyping approach enables the integration of many different media processing features in a short time and that it allows for accurate analysis of the resource (CPU/memory) requirements of such components.

关键词： multimedia content analysis PC networking prototyping UPnP service oriented architecture

来源：评论

学校读者我要写书评

暂无评论

Composite algorithms in image content searches 11

Composite algorithms in image content searches

引用

11th Annual conference on Distributed multimedia systems (DMS 2005)

作者： Parker, J. R. Behm, Brad Univ Calgary Digit Med Lab Calgary AB T2N 1N4 Canada Digit Technol Grp Amazon Com Seattle WA USA

ISBN: (纸本)1891706179

A combination of three algorithms is proposed that gives a reasonable rate of success in image similarity searches. All use region based statistical measures using a combination of color features, linear features, and intensities combined with a collection of methods for subdividing the image into regions. All possible combinations were evaluated and the best (highest success rate) was selected to be used as a practical image similarity measure. Component algorithms are combined using a simple decision fusion voting scheme, giving success rates in the range of 50-60%. For a web search application this is quite reasonable.

关键词： content based search image composite algorithms

来源：评论

学校读者我要写书评

暂无评论

Data mining learning bootstrap through semantic thumbnail analysis

Data mining learning bootstrap through semantic thumbnail an...

引用

conference on multimedia content access - algorithms and systems

作者： Battiato, Sebastiano Farinella, Giovanni Maria Giuffrida, Giovanni Tribulato, Giuseppe Univ Catania Dipartimento Matemat & Informat Viale Andrea Doria6 I-95125 Catania Italy

ISBN: (纸本)9780819466198

The rapid increase of technological innovations in the mobile phone industry induces the research community to develop new and advanced systems to optimize services offered by mobile phones operators (telcos) to maximize their effectiveness and improve their business. Data mining algorithms can run over data produced by mobile phones usage (e.g. image, video, text and logs files) to discover user's preferences and predict the most likely (to be purchased) offer for each individual customer. One of the main challenges is the reduction of the learning time and cost of these automatic tasks. In this paper we discuss an experiment where a commercial offer is composed by a small picture augmented with a short text describing the offer itself. Each customer's purchase is properly logged with all relevant information. Upon arrival of new items we need to learn who the best customers (prospects) for each item are, that is, the ones most likely to be interested in purchasing that specific item. Such learning activity is time consuming and, in our specific case, is not applicable given the large number of new items arriving every day. Basically, given the current customer base we are not able to learn on all new items. Thus, we need somehow to select among those new items to identify the best candidates. We do so by using a joint analysis between visual features and text to estimate how good each new item could be, that is, whether or not is worth to learn on it. Preliminary results show the effectiveness of the proposed approach to improve classical data mining techniques.

关键词： semantic image analysis data mining content based image retrieval learning bootstrap

来源：评论

学校读者我要写书评

暂无评论

Heterogeneous associative cache for multimedia applications

Heterogeneous associative cache for multimedia applications

引用

IASTED European conference on Internet and multimedia systems and Applications (EuroIMSA)

作者： Xie Yuejian Zhang Youhui Wang Dongsheng Tsinghua Univ 4-305 FIT Bldg Beijing 100084 Peoples R China

ISBN: (纸本)9780889866522

The off-chip memory communication is often a critical part of a video processing system. Traditional cache usually behaves poor since some video algorithms such as H.264 motion compensation tend to access memory in an inefficient way. Based on the analysis of cache line fetch efficiency, we find out that more than 10% fetches are inefficient. In this paper, we propose a Heterogeneous Associative Cache (HA Cache) architecture, in which there is an additional special way with a smaller cache line size, special mapping strategy and replacement policy. This scheme can effectively reduce power, cache space, and bandwidth wasted on useless data. By adding a special way to the traditional 2-way set-associative cache (with 1/8 cache size increase), the HA Cache can save up to 10% memory access. In most cases, it is even better than doubling the traditional cache size.

关键词： heterogeneous cache H.264 motion compensation

来源：评论

学校读者我要写书评

暂无评论

External memory page remapping for embedded multimedia systems

引用

ACM SIGPLAN NOTICES 2007年第7期42卷 185-194页

作者： Ning, Ke Kaeli, David Analog Devices Inc Norwood MA 02062 USA Northeastern Univ Dept Elect & Comp Engn Boston MA 02115 USA

As memory speeds and bus capacitances continue to rise, external memory bus power will make up an increasing portion of the total system power budget for system-on-a-chip embedded systems. Both hardware and software approaches can be explored to balance the power/performance tradeoff associated with the external memory. In this paper we present a hardware-based, programmable external memory page remapping mechanism which can significantly improve performance and decrease the power budget due to external memory bus accesses. Our approach was developed by studying common data access patterns present in embedded multimedia applications. In the paper, we evaluate a mechanism that can perform page remapping of external memory. We also develop an efficient algorithm to map application data and instruction memory into external memory pages. We employ graph-coloring techniques to guide the page mapping procedure. The objective is to avoid page misses by remapping conflicting pages to different memory banks (i.e., by assigning them different colors). Our algorithm can significantly reduce the memory page miss rate by 70-80% on average. For a 4-bank SDRAM memory system, we reduced external memory access time by 12.6%. The proposed algorithm can reduce power consumption in majority of the benchmarks, averaged by 13.2% of power reduction. Combining the effects of both power and delay, our algorithm can benefit significantly to the total energy cost.

关键词： algorithms design memory page remapping memory coloring embedded systems memory controllers

来源：评论

学校读者我要写书评

暂无评论

Combined delay and rate differentiation packet scheduling for multimedia content delivery in satellite broadcast/multicast systems

Combined delay and rate differentiation packet scheduling fo...

引用

IEEE International conference on Communications (ICC 2007)

作者： Du, Hongfei Fan, Linghang Evans, Barry G. Univ Surrey Ctr Commun Syst Res Surrey GU2 7XH England

ISBN: (纸本)9781424403523

The design of efficient packet scheduling algorithms is crucial to the radio resource management (RRM) in the satellite digital multimedia broadcasting (SDMB) system, which has emerged as a promising solution to the multimedia content delivery. In order to achieve more efficient quality of service (QoS) provisioning among different multimedia services, a novel packet scheduling algorithm, namely combined delay and rate differentiation (CDRD) packet scheduling, is proposed in this paper. This algorithm takes into account key QoS parameters aiming at fairly prioritising and scheduling heterogeneous multimedia contents in satellite environment. Its performance has been evaluated via simulations. The results show that, in comparison with existing scheduling algorithms, CDRD achieves better performance on delay, jitter and channel utilisation.

关键词： packet scheduling radio resource management SDMB MBMS quality of service

来源：评论

学校读者我要写书评

暂无评论

A unified and efficient framework for court-net sports video analysis using 3-D camera modeling

A unified and efficient framework for court-net sports video...

引用

conference on multimedia content access - algorithms and systems

作者： Han, Jungong de With, Peter H. N. Eindhoven Univ Technol POB 513 NL-5600 MB Eindhoven Netherlands RTSE LogicaCMG NL-5605 JB Eindhoven Netherlands

ISBN: (纸本)9780819466198

The extensive amount of video data stored on available media (hard and optical disks) necessitates video content analysis, which is a cornerstone for different user-friendly applications, such as, smart video retrieval and intelligent video summarization. This paper aims at finding a unified and efficient framework for court-net sports video analysis. We concentrate on techniques that are generally applicable for more than one sports type to come to a unified approach. To this end, our framework employs the concept of multi-level analysis, where a novel 3-D camera modeling is utilized to bridge the gap between the object-level and the scene-level analysis. The new 3-D camera modeling is based on collecting features points from two planes, which are perpendicular to each other, so that a true 3-D reference is obtained. Another important contribution is a new tracking algorithm for the objects (i.e. players). The algorithm can track up to four players simultaneously. The complete system contributes to summarization by various forms of information, of which the most important are the moving trajectory and real-speed of each player, as well as 3-D height information of objects and the semantic event segments in a game. We illustrate the performance of the proposed system by evaluating it for a variety of court-net sports videos containing badminton, tennis and volleyball, and we show that the feature detection performance is above 92% and events detection about 90%.

关键词： sports video content analysis camera calibration 3-D modeling tracking feature extraction

来源：评论

学校读者我要写书评

暂无评论

A hybrid recommender strategy for personalized utility-based cross-modal multimedia adaptation

A hybrid recommender strategy for personalized utility-based...

引用

IEEE International conference on multimedia and Expo (ICME 2007)

作者： Prangl, Martin Bachlechner, Roland Hellwagner, Hermann Dept. of Information Technology Klagenfurt University Austria

ISBN: (纸本)9781424410163

Enabling transparent and augmented use of multimedia content across a wide range of networks and devices is still a challenging task within the multimedia research community. Within multimedia frameworks, content adaptation is the core concept to overcome this issue. Most media adaptation engines targeting Universal multimedia access (UMA) scale the content w.r.t. terminal capabilities and network resource constraints and do not sufficiently consider user preferences. This paper focuses on a hybrid recommender technique for configuring a cross-modal utility model that guides adaptation of multimedia content. This approach additionally considers the user environment as well as demographic user data which leads to a personalized and increased multimedia experience. Based on a related adaptation decision technique we show how it is possible to offer a personalized adaptation for the individual user. We present a detailed evaluation of the approach based on results earned by subjective tests.

关键词： multimedia systems

来源：评论

学校读者我要写书评

暂无评论

Optimal allocation of cache servers and content files in content distribution networks

Optimal allocation of cache servers and content files in con...

引用

IASTED European conference on Internet and multimedia systems and Applications (EuroIMSA)

作者： Nakaniwa, Akiko Ebara, Hiroyuki Osaka Sangyo Univ Dept Informat Syst Engn 3-1-1 Nakagaito Osaka 5748530 Japan

ISBN: (纸本)9780889866522

content Distribution Networks (CDNs) have proliferated rapidly with the growth in network bandwidth and the variety of content files. The CDN service is one of the most popular Web services from Internet Service Providers (ISPs), since most ISPs are currently striving to provide additional services besides their original Internet access service. The Internet has seen an explosive increase in the number of users, which causes network servers to become overloaded, and we are currently facing several serious issues, such as declining reliability, increased response time, and so on. The replicated allocation of content files on cache servers for load-balancing is known as an effective solution to overcome these issues. In CDNs, one of the most important problems is how we allocate cache servers and content files while considering trade-offs between the cost, reliability, and delay. In this paper, we examine an example of the CDN service in an ISP "BBit-Japan", which is one of the biggest CDN service providers in Japan. We apply this example to the cache server and content allocation model which we have proposed. This optimization model introduces 0-1 integer programming to determine the optimal allocation of cache servers and content files. In this optimization model, we aim to maximize the reliability of the whole system subject to restrictions of cost and delay, and in considering trade-offs between reliability, cost, and delay. The use of this optimization model makes it possible to show precisely how they can properly allocate cache servers and content files at limited cost and within permissible delays to the CDN service providers.

关键词： content services mirroring cache server CDNs internet

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：