基于内容的多媒体数据查询和检索

多媒体数据具有可表现的视觉和听觉特性，而难于用符号形式来描述。本文介绍基于内容的对多媒体数据进行查询和检索的概念和方法，描述查询和检索的一般系统结构、用户查询类型、索引／过滤机制，以及视频的检索和浏览，并给出基于内容检索研究中值得探索的几个主要问题。     

多媒体数据库系统

本文旨在讨论多媒体数据库系统的特征。文中首先分析多媒体数据的特点及其对数据库管理系统的需求，然后，分别探讨多媒体数据库系统的关键技术问题：体系结构，物理存储模型，多媒体数据模型，多媒体对象的时空合成，查询处理和用户接口技术。     

多媒体素材库管理系统的研究与实现

本课题所实现的网站综合了单条件动态检索以及多条件组合检索的网上查询和动态网页技术.后台多媒体素材数据库能很好地支持各种媒体信息的管理维护,而且通过前台网页与用户的交流可以不断地扩充多媒体素材数据库信息.建立一个更加完善的面向高校教学育人的网站.     

在Oracle数据库中如何处理多媒体数据

多媒体不仅改变了数据库的接口 ,使其声、图、文并茂 ,而且也改变了数据库的操作形式 ,多媒体数据库技术、多媒体网络技术为多媒体信息的存储、管理、传递与检索创造了条件。本文介绍了在Oracle数据库中对二进制大数据对象进行处理 ,实现了对多媒体数据的存储和查询     

一种基于内容的图像检索界面

基于内容和对象的图像压缩和检索是下一代的图像处理技术,具有较广阔的应用前景。目前该领域的研究主要从设计方便、快捷的用户查询界面和发展图像数据库检索技术两方面展开。为此,该文提出了一种基于内容的图像检索用户界面的设计方法来满足用户复杂的检索要求。在图像的检索过程中,通过用户组合图标的方法来描述检索要求,同时将图像的颜色和空间信息相结合进行图像查询,并借助用户的反馈信息实现系统的自学习功能,最终逐步提高系统图像检索的速度和准确性。     

领域相关多媒体对象的基于内容查询

该文通过对多媒体对象领域知识特点的分析，指出了领域属性与多媒体对象分离的必要性，对多媒体对象的领域属性进行了分类，采用框架（frame）结构作为领域知识的表示模式，利用语义网表示领域概念之 分类关系以及同义关系，并用上下文（context）记录了特定用户更细的辅助知识，包括多媒体相似阈值刻画、模糊值的描述以及用户查询反馈等参数。该文还给出了多媒体对象相似的计算公式，分析了多媒体基于内容查询的各种类型，研究了多媒体查询处理过程。     

基于对象的彩信图像检索系统的研究与实现

基于对象的彩信图像检索系统是继图像检索和彩信检索结合的新一代信息检索技术,介绍了目前热门的基于对象的图像检索系统的概念,以及应用到彩信检索领域的工作原理.在基于对象的图像检索基础上,加入了对图像中区域对象的识别过程,并将识别结果存入图像属性索引数据库,然后在检索过程中根据用户输入的对象查询请求,到数据库里进行检索,最终将检索结果返回给彩信用户.     

通信网络数据云存储数据库可验证密文检索研究

云端数据加密在保障数据安全的同时,也给数据检索工作带来了困难.为此,提出一种通信网络数据云存储数据库可验证密文检索方法.首先分析云存储数据库加密形式,选取字符型数据作为加密检索对象;然后预处理字符型数据,建立密文索引结构,再对用户检索词进行处理,包括去停用词、查询切分、查询扩展、检索词加密等过程,最后通过计算密文检索词...     

多媒体对象查询语言及其查询处理

文章研究了多媒体数据库的查询需求,提出结构化的多媒体对象查询语言MOQL(multi-media object query language).它能够支持基于类型、结构特征、同步关系、时态关系和内容信息的多媒体查询.以DB2数据库为存储机制,定义了一组代数算子和变换规则,利用它们可以将用户定义的MOQL查询变换为代数表达式,进行代数优化,并将代数查询表达式转换为能够在DB2数据库上运行的DB2SQL和C++查询过程.     

公共信息查询平台的设计

文章介绍了现有信息查询平台的特点，阐述了公共信息查询平台的原理及技术实现。平台采取分布式方式构建，内容涉及公共用户的信息检索，是一个针对性强的分布式多媒体搜索引擎。     

协同多媒体菱工具中演示文档的同步模型

多媒体演示文档的协同菱对文档本身的结构与同步模型提出了一定的要求。为了便于面向对象的实现以及灵活多粒度的共享，提出了一个协同多媒体著作工具中分布交互式多媒体文档的同步模型。在此模型中，文档结构分为三层：页面层、对象组层及单媒体对象层，根据各层的特点，其同步分别采用基于跳转、基于事件及基于时间的策略。     

Content-based management of video in a multimedia authoring environment

This paper describes architecture and implementation of a multimedia authoring environment which features content-based management of video.The goal of our work is to provide multimedia application developers with a useful video database, where they gather video materials from various sources, store them in a organized format, and use them in multimedia applications. The principal design concepts are that (1) it should have a flexible means to store video materials in a organized format so that video clips can be retrieved easily, and that (2) it should have a view to each application so that various applications can share the video materials.To meet these requirements we designed a multimedia authoring system based on a video object model. The video object model features (1) a method to attach annotations not only to scenes but also to things shot in the video, and (2) a method to define video clips independently from physical video data.Our experiences in using the system to develop a multimedia CAI application are also described to show the advantages of our system.     

A Scalable Toolkit for Designing Multimedia Authoring Environments

This paper introduces Kaomi, a scalable toolkit for designing authoring environments of multimedia documents. The underlying concept is to provide the designer of multimedia applications with a fast method to get an authoring system based on a set of synchronized views (the presentation view for displaying the document, the scenario view for showing the temporal organization of the document, ...) so that each view is the support of editing actions. Kaomi is flexible enough to support a variety of multimedia documents declarative formats. It is indeed a scalable toolkit since it provides facilities for extending and/or for modifying the resulting authoring environment. In addition, cross-platform portability is provided which allows operation in the heterogenous Internet environment. The use of Kaomi is mainly described through the design of two authoring environments: one for authoring a sub-set of the Smil standard of the W3C and the other one for Madeus, a constraint based multimedia language.     

Modeling, authoring and formatting hypermedia documents in the HyperProp system

This paper discusses multimedia and hypermedia modeling, authoring and formatting tools, presenting the proposals of the HyperProp system and comparing them to related work. It also highlights several research challenges that still need to be addressed. Moreover, it stresses the importance of document logical structuring and considers the use of compositions in order to represent context relations, synchronization relations, derivation relations and task relations in hypermedia systems. It discusses temporal and spatial synchronization among multimedia objects and briefly presents the HyperProp graphical authoring and formatting tools. Integration between the proposed system and the WWW is also addressed.     

基于OCPN的SMIL文档创作平台设计与实现

基于SMIL的多媒体文档创作平台是目前的应用研究重点。SMIL Authoring Tool(SAT)创作平台在参考了SMIL2．O定义基础上，以OCPN为多媒体同步时序定义的基本模型，分析了国内外现有的系统优缺点之后，利用面向对象的方法实现。SAT相对于已有的系统而言，它使用树形组织结构和OCPN对节点之间的时序和节点内部的详细同步信息进行设置，二者互相补充，可使用户进行简单的同步时序设置。     

Interactive hypermedia applications: A model and its implementation

By referring to the object-oriented efforts of the Multimedia and Hypermedia information coding Expert Group (MHEG), and the augmented Petri net model, we present a formal definition of the multimedia hypermedia Petri net (MHPN) model. Through this proposed model, issues of authoring, rendering and synchronization of multimedia information (i.e. structure authoring, spatial temporal relationships, user interaction, etc.) can all be laid to rest. We have implemented a testbed system, the Petri net object information system (POIS), which offers considerable potential for the development of distributed hypermedia applications. The testbed has been implemented on an IBM-PC486 under Windows 3.1. We are now in the process of porting the testbed model to Windows NT.     

人造复杂系统的多媒体认知软件中数据模型的研究

文章根据人造复杂系统的特性和人的认知规律,提出了一个基于对象的多媒体认知软件系统数据模型。数据模型由媒体存取层、多媒体对象层和多媒体表现层和多媒体应用层构成。这种层次模型将媒体异构环境存取、多媒体对象处理和语义合成表现以及各种时序关系等问题在不同层次分别进行处理,使软件系统具有很好的灵活性和可复用性。     

Authoring of scalable multimedia documents

With the diversity of usage conditions affecting the consumption of multimedia content, the adaptation of dynamic and interactive multimedia presentations is essential. The challenge consists in allowing a multimedia presentation to adapt in all its dimensions: spatially, temporally and interactively, without lessening its attractiveness and still giving the author the control over adapted versions. Additionally, the authoring of adaptable content should not increase the complexity of authoring. To address this challenge, we propose to transpose the concept of scalability to the world of multimedia documents by introducing the so-called Scalable MSTI model. In this paper, we show the properties of this model and how, from an authoring point of view, scalable multimedia documents can be created to address a wide range of usage conditions.     

A Multimedia Authoring-in-the-Large Environment to Support Complex Product Documentation

In this paper, we present a new paradigm for multimedia document authoring to support large-scaled industrial technical documentation. An industrial-strength multimedia authoring environment requires a high degree of automation support for producing a large amount of high-quality technical documentation efficiently and effectively, and provides a consistent user interface to facilitate viewing and browsing of large-scaled technical contents. Product documentation includes technical information in all media for all aspects of a product during the life cycle of the product. Product documents are highly cross-referenced and often shared by a family of related product models. Previous authoring paradigms have their limitations in supporting such complex technical documentation required for today's sophisticated products. Our approach is based on an authoring-in-the-large paradigm by adopting formal configuration specifications for automatically assembling machine-specific product manuals from component documents, and formal hyperlink specifications for systematically creating hyperlinks in highly cross-referenced technical documents. Integrated media-specific viewers are provided to support viewing, browsing and navigation of large-scaled hyperlinked multimedia contents in a consistent manner for various product-related applications such as operation, maintenance and training on various platforms such as UNIX, PC/Windows, laptops and hand-held devices locally and over network.