共查询到20条相似文献,搜索用时 15 毫秒
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传统本体技术不能很好地解决多媒体信息系统的互操作问题。为实现多硬件平台下分布式、异构多媒体信息的互操作,采用MPEG-7本体描述多媒体信息。并在此基础上提出了基于MPEG-7本体的多媒体信息互操作框架,该框架采用MPEG-7本体,领域本体与应用本体等三个层次来描述对象。给出了框架的分层描述及具体功能。该框架已在高性能宽带信息网应用示范E-Show数字博览平台系统设计中采用,并取得了良好的应用效果。 相似文献
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The MPEG-7 Multimedia Database System (MPEG-7 MMDB) 总被引:1,自引:0,他引:1
Mario Döller Author Vitae Harald Kosch Author Vitae 《Journal of Systems and Software》2008,81(9):1559-1580
Broadly used Database Management Systems (DBMS) propose multimedia extensions, like Oracle’s Multimedia (formerly interMedia). However, these extensions lack means for managing the requirements of multimedia data in terms of semantic meaningful querying, advanced indexing, content modeling and multimedia programming libraries.In this context, this paper presents the MPEG-7 Multimedia DataBase System (MPEG-7 MMDB). The innovative parts of our system are our metadata model for multimedia content relying on the XML-based MPEG-7 standard, a new indexing and querying system for MPEG-7, the query optimizer and the supporting internal and external application libraries.The resulting system, extending Oracle 10g, is verified and demonstrated by the use of two real multimedia applications in the field of audio recognition and image retrieval. 相似文献
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MPEG-7与基于内容的图像检索 总被引:8,自引:0,他引:8
图像检索是有着广泛意义的多媒体应用领域。基于内容的图像检索属于较高层次上的检索。该文对基于内容的图像检索的研究现状进行了分析,介绍了国际上即将推出的多媒体内容描述标准MPEG—7,并提出了一种实现MPEG—7标准图像检索系统的抽象模型。 相似文献
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通信与网络技术的飞速发展使得多媒体信息日益增长,传统的基于关键字的检索方式无法满足人们的需要,MPEG-7标准的推出使这一情况出现了转机.文章介绍了MPEG-7标准的主要内容,并对该标准的Pull和Push两类主要应用进行了对比分析,指出了它们的应用领域以及使用时应注意的问题. 相似文献
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Organizational knowledge typically comes from numerous independent sources, each with its own semantics. This paper describes a methodology by which information from large numbers of such sources can be associated, organized, and merged. The hypothesis is that a multiplicity of ontology fragments, representing the semantics of the independent sources, can be related to each other automatically without the use of a global ontology. That is, any pair of ontologies can be related indirectly through a semantic bridge consisting of many other previously unrelated ontologies, even when there is no way to determine a direct relationship between them. The relationships among the ontology fragments indicate the relationships among the sources, enabling the source information to be categorized and organized. An evaluation of the methodology has been conducted by relating numerous small, independently developed ontologies for several domains. A nice feature of the methodology is that common parts of the ontologies reinforce each other, while unique parts are deemphasized. The result is a consensus ontology. 相似文献
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一种基于MPEG-7形状特征描述符算法 总被引:3,自引:0,他引:3
介绍MPEG-7标准中定义的形状描述符,提出一种基于区域的形状描述算法——ARS算法,并通过实验证明该算法能保证提取的基于区域的形状描述符旋转不变。 相似文献
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Uma Srinivasan Silvia Pfeiffer Surya Nepal Michael Lee Lifang Gu Stephen Barrass 《Multimedia Tools and Applications》2005,27(1):105-141
Digital audio & video data have become an integral part of multimedia information systems. To reduce storage and bandwidth requirements, they are commonly stored in a compressed format, such as MPEG-1. Increasing amounts of MPEG encoded audio and video documents are available online and in proprietary collections. In order to effectively utilise them, we need tools and techniques to automatically analyse, segment, and classify MPEG video content. Several techniques have been developed both in the audio and visual domain to analyse videos. This paper presents a survey of audio and visual analysis techniques on MPEG-1 encoded media that are useful in supporting a variety of video applications. Although audio and visual feature analyses have been carried out extensively, they become useful to applications only when they convey a semantic meaning of the video content. Therefore, we also present a survey of works that provide semantic analysis on MPEG-1 encoded videos. 相似文献
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MPEG-7颜色、纹理和形状描述子 总被引:3,自引:1,他引:3
纪敏 《计算机工程与应用》2004,40(26):44-47,72
MPEG-7视觉标准制定了若干基于图像内容的视觉描述子,从而为直观地表达图像和视频特征提供了更加行之有效的方法。在对图像或视频进行基于内容的识别、过滤和浏览时,视觉描述子有着广泛的应用。MPEG-7定义了颜色、纹理、(物体)形状、运动等视觉描述子,论文介绍其中颜色、纹理和形状描述子的意义、提取算法以及一些主要的特性。 相似文献
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在电影动画的制作过程中,会产生各种类别的素材资料,如果能充分地利用这些现有的资料进行新的电影制作,将会大大缩短制作周期、提高工作效率、减少投资。在制作电影的过程中,能快速检索找到所需要的素材是非常必要的。时MPEG-7标准中的颜色特征如何在电影素材库中进行检索进行了研究,并给出一套实验系统。 相似文献
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基于MPEG-7中主颜色提取的改进方法 总被引:6,自引:0,他引:6
针对实时性检索系统,结合MPEG-7标准的颜色评价准则,提出了一种基于MPEG-7中主颜色描述符提取的改进方法,实验结果表明改进效果明显。 相似文献
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在电影动画的制作过程中,会产生各种类别的素材资料,如果能充分地利用这些现有的资料进行新的电影制作,将会大大缩短制作周期、提高工作效率、减少投资。在制作电影的过程中,能快速检索找到所需要的素材是非常必要的。对MPEG-7标准中的颜色特征如何在电影素材库中进行检索进行了研究,并给出一套实验系统。 相似文献
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