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Package-Segment Model for movie retrieval system and adaptable applications 电影检索系统的包段模型及其应用
Pub Date : 1999-06-07 DOI: 10.1109/MMCS.1999.778616
T. Kunieda, Y. Wakita
We verify the Package-Segment Model which we are proposing as a representation method for multimedia content logical structure. We describe the effectiveness of the content logical structure. The Package-Segment Model consists of various objects that are defined as structure components and are involved in the construction processes. We developed an experimental retrieval system of the contents that are indexed by this Package-Segment Model. We confirm that the Package-Segment Model has representation flexibility and its object framework and retrieval mechanism are very adaptable. Therefore it can be integrated into various multimedia content management systems. A prototype application of automatic indexing and retrieval is also presented and evaluated.
我们验证了我们提出的包段模型作为多媒体内容逻辑结构的表示方法。我们描述了内容逻辑结构的有效性。包段模型由各种对象组成,这些对象被定义为结构组件,并参与构建过程。我们开发了一个基于包段模型的内容检索实验系统。结果表明,包段模型具有表示灵活性,其对象框架和检索机制具有很强的适应性。因此可以集成到各种多媒体内容管理系统中。最后给出了一个自动标引与检索的原型应用,并对其进行了评价。
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引用次数: 5
VHS to VRML: 3D graphical models from video sequences VHS到VRML:从视频序列的3D图形模型
Pub Date : 1999-06-07 DOI: 10.1109/MMCS.1999.779119
Andrew Zisserman, A. Fitzgibbon, G. Cross
We describe a method to completely automatically recover 3D scene structure together with a camera for each frame from a sequence of images acquired by an unknown camera undergoing unknown movement. Previous approaches have used calibration objects or landmarks to recover this information, and are therefore often limited to a particular scale. The approach of this paper is far more general, since the "landmarks" are derived directly from the imaged scene texture. The method can be applied to a large class of scenes and motions, and is demonstrated for sequences of interior and exterior scenes using both controlled-motion and hand-held cameras. We demonstrate two applications of this technology. The first is the construction of 3D graphical models of the scene; the second is the insertion of virtual objects into the original image sequence. Other applications include image compression and frame interpolation.
本文描述了一种完全自动恢复三维场景结构的方法,该方法与每个帧的摄像机一起从未知摄像机经过未知运动获得的图像序列中恢复3D场景结构。以前的方法使用校准对象或地标来恢复这些信息,因此通常限于特定的尺度。本文的方法更为通用,因为“地标”是直接从图像场景纹理中导出的。该方法可以应用于大量的场景和运动,并演示了内部和外部场景的序列使用控制运动和手持相机。我们将演示该技术的两种应用。首先是构建场景的三维图形模型;第二种是将虚拟对象插入到原始图像序列中。其他应用包括图像压缩和帧插值。
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引用次数: 57
Content-based hierarchical classification of vacation images 基于内容的度假图像分层分类
Pub Date : 1999-06-07 DOI: 10.1109/MMCS.1999.779255
Aditya Vailaya, Mário A. T. Figueiredo, Anil K. Jain, HongJiang Zhang
Grouping images into (semantically) meaningful categories using low level visual features is a challenging and important problem in content based image retrieval. Using binary Bayesian classifiers, we attempt to capture high level concepts from low level image features under the constraint that the test image does belong to one of the classes of interest. Specifically, we consider the hierarchical classification of vacation images; at the highest level, images are classified into indoor/outdoor classes, outdoor images are further classified into city/landscape classes, and finally, a subset of landscape images is classified into sunset, forest, and mountain classes. We demonstrate that a small codebook (the optimal size of codebook is selected using a modified MDL criterion) extracted from a vector quantizer can be used to estimate the class-conditional densities of the observed features needed for the Bayesian methodology. On a database of 6931 vacation photographs, our system achieved an accuracy of 90.5% for indoor vs. outdoor classification, 95.3% for city vs. landscape classification, 96.6% for sunset vs. forest and mountain classification, and 95.5% for forest vs. mountain classification. We further develop a learning paradigm to incrementally train the classifiers as additional training samples become available and also show preliminary results for feature size reduction using clustering techniques.
在基于内容的图像检索中,利用低级视觉特征将图像分组为语义上有意义的类别是一个具有挑战性和重要的问题。使用二进制贝叶斯分类器,我们尝试在测试图像确实属于感兴趣的类之一的约束下,从低级图像特征中捕获高级概念。具体来说,我们考虑了度假图像的分层分类;在最高层次上,将图像分为室内/室外类,室外图像进一步分为城市/景观类,最后将景观图像子集分为日落类、森林类和山地类。我们证明了从矢量量化器中提取的小码本(使用改进的MDL准则选择最佳码本大小)可用于估计贝叶斯方法所需的观察特征的类条件密度。在一个包含6931张假期照片的数据库中,我们的系统在室内与室外分类上的准确率为90.5%,在城市与景观分类上的准确率为95.3%,在日落与森林和山地分类上的准确率为96.6%,在森林与山地分类上的准确率为95.5%。我们进一步开发了一种学习范式,随着可用的额外训练样本的增加,逐步训练分类器,并展示了使用聚类技术减少特征大小的初步结果。
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引用次数: 187
Realizing throughput guarantees in a differentiated services network 在差异化业务网络中实现吞吐量保障
Pub Date : 1999-06-07 DOI: 10.1109/MMCS.1999.778442
I. Yeom, A. Reddy
This paper discusses techniques for achieving desired throughput guarantees in the Internet that supports a differentiated services framework. The diff-serv framework proposes the use of different drop precedences to achieve service guarantees over the Internet. However, it has been observed that the drop precedences by themselves cannot achieve the desired target rates because of the strong interaction of the transport protocol with packet drops in the network. This paper proposes and evaluates a number of techniques to better achieve the throughput guarantees in such networks. The proposed techniques consider: modifying the transport protocol at the sender; modifying the marking strategies at the marker; and modifying the dropping policies at the router. It is shown that these techniques improve the likelihood of achieving the desired throughput guarantees and also improve the service differentiation.
本文讨论了在支持差异化服务框架的因特网中实现所需吞吐量保证的技术。差分服务框架建议使用不同的丢弃优先级来实现互联网上的服务保证。然而,由于传输协议与网络中的丢包之间的强交互作用,丢包优先级本身并不能达到期望的目标速率。本文提出并评估了在这种网络中更好地实现吞吐量保证的一些技术。提出的技术考虑:在发送端修改传输协议;在标记处修改标记策略;修改路由器上的丢弃策略。结果表明,这些技术提高了实现期望的吞吐量保证的可能性,并改善了服务的差异性。
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引用次数: 81
Performance and reliability study for distributed video servers: mirroring or parity? 分布式视频服务器的性能和可靠性研究:镜像还是奇偶校验?
Pub Date : 1999-06-07 DOI: 10.1109/MMCS.1999.778557
Jamel Gafsi, E. Biersack
We study video server performance and reliability. We classify several reliability schemes based on the redundancy technique used (mirroring vs. parity) and of the distribution granularity of redundant data. Then, we propose for each scheme its adequate data layout. To calculate the server reliability we apply discrete modeling based on Markov chains. Further we focus on the trade-off between achieving high reliability and low per stream cost. Our results show that, in contrast to intuition, for the same degree of reliability mirroring-based schemes always outperform parity-based schemes in terms of per stream cost and also restart latency after disk failure. Our results also show that a mirroring scheme that copies original data of a single disk onto a subset of all disks significantly improves the server reliability and slightly increases the per stream cost as compared to the classical interleaved mirroring scheme.
我们研究视频服务器的性能和可靠性。我们根据所使用的冗余技术(镜像与奇偶校验)和冗余数据的分布粒度对几种可靠性方案进行了分类。然后,我们为每个方案提出了适当的数据布局。为了计算服务器可靠性,我们采用了基于马尔可夫链的离散建模方法。此外,我们专注于实现高可靠性和低每流成本之间的权衡。我们的结果表明,与直觉相反,对于相同程度的可靠性,基于镜像的方案在每个流成本和磁盘故障后重新启动延迟方面总是优于基于奇偶校验的方案。我们的结果还表明,与经典的交错镜像方案相比,将单个磁盘的原始数据复制到所有磁盘的子集上的镜像方案显着提高了服务器可靠性,并略微增加了每个流的成本。
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引用次数: 15
Adaptive QoS resource management in dynamic environments 动态环境下的自适应QoS资源管理
Pub Date : 1999-06-07 DOI: 10.1109/MMCS.1999.778631
S. Chatterjee, Michael Brown
As greater numbers of end users run both multimedia applications and traditional desktop applications (word processing, spreadsheets, etc.) on the same distributed system (e.g., an office intranet or the Internet), the issue of how to provide adaptive quality of service (QoS) in a highly dynamic, shared, and heterogeneous resource environment becomes very important. While Java/spl dagger/ is an elegant solution to the heterogeneity problem, it lacks adaptive QoS support, which is critical to multimedia and other real-time applications. Our ERDoS (End-to-End Resource Management of Distributed Systems) project presents solutions to the adaptation problem. We will demonstrate our innovative content-based adaptation algorithm, embedded within the Java Virtual Machine (JVM) using a set of multimedia applications on a laptop computer running Linux. If the underlying infrastructure provides real-time support, it becomes much easier to extend the support to the application layers. However, the underlying infrastructure for most common systems (whether it is an intranetwork, extranetwork or the Internet) is non-real time. The problem is exacerbated because these newer multimedia applications have to co-reside within the same distributed infrastructure with current desktop applications, which are non-real time and have unpredictable resource usage patterns. Therefore, our objective is to provide adaptive QoS support to these new multimedia applications within a best-effort infrastructure. We are not trying to extend Java to support real-time guarantees for applications because of the inherent non-real-time properties of Java (e.g., its dynamic loading and linking, and garbage collection). Instead, our goal is to insert sophisticated multiapplication, multidimensional QoS adaptation algorithms inside the JVM, to enable it to gracefully adapt multimedia applications as system state changes, in a manner that minimizes the adverse visual effect on these applications' users.
随着越来越多的终端用户在同一分布式系统(例如,办公室内部网或Internet)上运行多媒体应用程序和传统桌面应用程序(文字处理、电子表格等),如何在高度动态、共享和异构资源环境中提供自适应服务质量(QoS)的问题变得非常重要。虽然Java/spl /是异构问题的一种优雅的解决方案,但它缺乏自适应QoS支持,这对多媒体和其他实时应用程序至关重要。我们的ERDoS(端到端分布式系统资源管理)项目提出了适应问题的解决方案。我们将使用运行Linux的笔记本电脑上的一组多媒体应用程序,演示我们的创新的基于内容的自适应算法,该算法嵌入到Java虚拟机(JVM)中。如果底层基础设施提供实时支持,那么将支持扩展到应用程序层就容易得多。然而,大多数常见系统(无论是内部网、外部网还是Internet)的底层基础设施都是非实时的。由于这些较新的多媒体应用程序必须与当前的桌面应用程序共同驻留在相同的分布式基础设施中,而当前的桌面应用程序是非实时的,并且具有不可预测的资源使用模式,因此问题变得更加严重。因此,我们的目标是在尽力而为的基础设施中为这些新的多媒体应用程序提供自适应的QoS支持。由于Java固有的非实时属性(例如,它的动态加载和链接,以及垃圾收集),我们没有尝试扩展Java来支持应用程序的实时保证。相反,我们的目标是在JVM中插入复杂的多应用程序多维QoS适应算法,使其能够在系统状态变化时优雅地适应多媒体应用程序,从而最大限度地减少对这些应用程序用户的不利视觉影响。
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引用次数: 5
Architecture and implementation of a network-based educational hypermedia system 基于网络的教育超媒体系统的架构与实现
Pub Date : 1999-06-07 DOI: 10.1109/MMCS.1999.779267
C. M. Papaterpos, Georgios D. Styliaras, G. Tsolis, T. Papatheodorou
ISTOPOLIS is a network-based hypermedia educational system, which addresses needs of end-users (teachers and students) and content providers. ISTOPOLIS operates over the classroom LAN, over a remote connection to a server or as a standalone application. Students locate information placed within specific context categories and reuse it within their projects. This is supported through a set of Web-based navigation services (Access Tools) and a simple authoring environment integrated within a specialized client. In the back-end, original content authoring is supported through a classification based methodology and tools. The system is suitable for a variety of educational areas. Its current implementation addresses History and is undergoing evaluation in high schools.
ISTOPOLIS是一个基于网络的超媒体教育系统,它满足了最终用户(教师和学生)和内容提供者的需求。ISTOPOLIS通过教室局域网运行,通过远程连接到服务器或作为一个独立的应用程序。学生将信息放置在特定的上下文类别中,并在他们的项目中重用它。这是通过一组基于web的导航服务(访问工具)和集成在专门客户端的简单创作环境来实现的。在后端,通过基于分类的方法和工具支持原始内容创作。该系统适用于各种教育领域。它目前的实施涉及历史,并正在高中进行评估。
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引用次数: 2
Morphological tools for indexing video documents 用于索引视频文档的形态学工具
Pub Date : 1999-06-07 DOI: 10.1109/MMCS.1999.778628
C. Demarty, S. Beucher
This paper proposes a local algorithm using morphological operators, which leads to several useful tools for indexing video documents. It consists of a local computation of a similarity criterion between two successive frames of a sequence, followed by the study of the temporal evolution curve of this criterion for the whole sequence. From this curve, shot transitions are extracted by means of a powerful morphological filter, the inf top-hat. At this point, we have built a cut detection tool. The local computation together with strong morphological filtering leads to a very simple, fast and computationally efficient algorithm, with a high detection rate in the case of cuts for a small level of false detections. This algorithm also gives access to a spatial model of the transition and to a selection of key frames for each shot. By applying the local similarity measure to the key frames, two other tools are built to detect inner shot changes and syntactically related shots. Finally, the relation detection is used in a newscaster detection tool.
本文提出了一种基于形态学算子的局部索引算法,该算法为视频文档的索引提供了几种有用的工具。它首先局部计算序列的两个连续帧之间的相似性准则,然后研究该准则在整个序列中的时间演化曲线。从这条曲线中,镜头转换是通过一个强大的形态过滤器提取的。至此,我们已经构建了一个切割检测工具。局部计算与强形态滤波相结合,使得该算法非常简单、快速、计算效率高,在检测误检率低的情况下,具有很高的检测率。该算法还可以访问过渡的空间模型,并为每个镜头选择关键帧。通过对关键帧应用局部相似度量,构建了另外两个工具来检测内部镜头变化和语法相关镜头。最后,将关系检测应用于新闻播报员检测工具中。
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引用次数: 8
Searching for multimedia on the World Wide Web 在万维网上搜索多媒体
Pub Date : 1999-06-07 DOI: 10.1109/MMCS.1999.779116
M. Swain
The proliferation of multimedia on the World Wide Web has led to the introduction of Web search engines for images, video and audio. On the Web, multimedia is typically embedded within documents that provide a wealth of indexing information. Harsh computational constraints imposed by the economics of advertising-supported searches restrict the complexity of analysis that can be performed at query time and users may be unwilling to do much more than type a keyword or two to input a query. Therefore, the primary sources of information for indexing multimedia documents are text cues extracted from HTML pages and multimedia document headers. Off-line analysis of the content of multimedia documents can be successfully employed in Web search engines when combined with these other information sources. Content analysis can be used to categorize and summarize multimedia, in addition to providing cues for finding similar documents.
万维网上多媒体的激增导致了图像、视频和音频的网络搜索引擎的引入。在Web上,多媒体通常嵌入在提供丰富索引信息的文档中。由广告支持的搜索的经济性所施加的严格计算约束限制了在查询时可以执行的分析的复杂性,用户可能不愿意做更多的事情,而只是输入一两个关键字来输入查询。因此,索引多媒体文档的主要信息源是从HTML页面和多媒体文档标头中提取的文本线索。当与这些其他信息源相结合时,可以成功地在Web搜索引擎中使用多媒体文档内容的离线分析。内容分析除了提供查找类似文档的线索外,还可以用于对多媒体进行分类和总结。
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引用次数: 32
On the use of histograms for image retrieval 直方图在图像检索中的应用
Pub Date : 1999-06-07 DOI: 10.1109/MMCS.1999.778207
R. Brunelli, O. Mich
This paper analyzes the use of histograms of low-level image features, such as color and luminance, as descriptors for image retrieval purposes. The discrimination ability of several descriptors, the issues of histogram size and comparison, are considered in a common statistical framework.
本文分析了使用直方图的低级图像特征,如颜色和亮度,作为图像检索的描述符。在一个共同的统计框架中考虑了几种描述符的区分能力、直方图大小和比较问题。
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引用次数: 53
期刊
Proceedings IEEE International Conference on Multimedia Computing and Systems
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