面向虚拟环境的装配体模型研究

人机交互是虚拟装配的本质特性和技术瓶颈，能反映交互过程的装配体模型构造，是虚拟装配领域的一个关键问题，给出一种时序的装配体模型，对时序的聚合关系、时序的约束关系以及时序的行为结构给出定义和分析，为实现该模型，还给出了零件的中间模型和对象复杂行为构造，同时对虚拟装配直接操作的交互过程、交互模式及装配工艺知识给出了时序的形式描述，这是连接人机交互与装配体模型以及模型与工艺生成的桥梁．一致的表示模型减少了交互装配信息的冗余性，有利于提高交互信息的复用，为交互生成工艺提出了新方法。     

多媒体地理信息系统集成软件的结构与策略

介绍了一种在多媒体环境下,通过地图、动画及图像等形式介绍人文地理的系统开发集成软件。并详细介绍了该软件的结构与操作规则,构造了一种开发地理信息系统的工具和框架。该软件的使用,给人们带来了查阅地理信息的方便,值得在各地理信息系统推广、使用     

基于图形界面的多媒体交互设计研究

在这个信息化的时代,以人为中心的设计理念已成为设计领域的发展方向和研究热点,多媒体环境下的设计不再是形式的艺术性和信息的简单呈现,自然地人机交互和良好的用户体验逐步变成关注的焦点.因此,提出多媒体交互设计的研究,具有社会根源以及现实需要的根源.     

基于ORACLE数据库的多媒体数据SQL级操作探究

探索ORACLE数据库平台下多媒体数据在SQL级直接操作的可行性.以Oracle interMedia为背景,运用多媒体数据PL/SQL API实现多媒体数据文件存取.虽然在关系数据库中对多媒体数据即非结构化数据进行操作时,和结构化数据的处理方式不同,但在ORACLE数据库平台下将基本sQL和多媒体数据PL/SQL API整合运用,屏蔽了多媒体数据处理的复杂性,对外呈现出一致的SQL级操作是可能的.在ORACLE10g的数据库平台上,通过分析Oracle interMedia体系结构和多媒体数据的特点以及在ORACLE中的存储方式,探索在SQL级实现常规结构化数据类型与表示多媒体内容的非结构化数据类型统一操作的可行性和实现途径.     

序列模式图及其构造算法

序列模式挖掘是数据挖掘的一个重要分支。在序列事务及有关信息处理中有着广泛的应用,目前已有许多序列模式模型及相应的挖掘算法，该文在对序列模式挖掘问题及挖掘算法进行分析的基础上。定义了一种称为序列模式图的序列模式框架。用于表示序列模式挖掘过程发现的所有序列模式，序列模式图是由离散状态的序列集到统一的图结构的桥梁，可以将序列模式挖掘结果统一到序列模式图中来，基于序列模式图进行研究可发现某些结构化的新知识，称之为后序列模式挖掘，文中还给出了序列模式图的有关性质及构造算法。     

基于综合推理的多媒体语义挖掘和跨媒体检索

为了更准确地进行跨媒体检索,需要挖掘、学习不同类型多媒体对象之间的语义关联,为此提出一种基于综合推理模型的多媒体语义挖掘和跨媒体检索技术.首先根据多媒体对象的底层特征构造推理源,根据多媒体对象的共生关系构造影响源场来进行综合推理,并构造出多媒体语义空间;然后针对不同检索例子,根据伪相关反馈为每一个检索例子自适应地选择不同的榆索方法进行跨媒体检索.为了处理检索例子不在训练集合内的情况,提出了两阶段学习方法完成检索;同时还提出了一种基于日志的长程反馈学习算法,以提高系统性能.实验结果证明,该技术能够准确地挖掘多媒体语义,多媒体文档检索和跨媒体检索效果准确_凡稳定.     

一种超媒体表现的时间合成模型

多媒体信息在时间上具有一定的意义，即媒体表现需要时间，而同时在超媒体系统中多媒体表现对于用户来说又是“有交互性参与创作再现”，因此还必须将文互性也“时间化”我们在“基于Ｃｌｉｅｎｔ／Ｓｅｒｖｅｒ多媒体创作平台ＨＣＳ”中采用了一种不确定的时间关系模型来统一描述超媒体表现及其交互的时间合成。它是一种即能表示定量时间关系，又能表示定性时间关系的模型，而且所有的时间关系都可以用图形表示，目的就是要建立一种     

基于内容的多媒体检索技术浅析

基于内容的多媒体检索是从新的角度来管理多媒体信息,包括视频媒体的结构化组织和浏览;图像和音频信号的处理.使其应用于更广泛的信息存取.文章分析了内容的多媒体检索的技术原理、特点和方法.指出一些需要完善的问题,如特征提取和语义获取、基于内容的编码等.     

多媒体PC机—MPC

信息表示与人机关系自然化,是计算机长期追求的目标。多媒体技术把电视式的视听信息传播能力与计算机交互控制功能相结合,创造出集文、图、声、像于一体的新型信息处理模型,使计算机多媒体具有数字式全动态、全屏幕的播放编辑和创作多媒体信息功能,具有控制和传输多媒体电子邮件、电视会议等视频技术所应用,具有计算机与家电一体化的条件扩展,使世人耳目一新。强大的社会需求,促使多媒体技术加速走向标准化和实用化。多媒体PC——MPC是多媒体技术的一个典型的实用系统。     

智能分布式多媒体信息存储环境的结构模型

从多媒体信息处理系统的数据结构模型出发,考虑到系统所涉及的多种类型信息处理和多种层次的信息表示,提出了一种智能分布式多媒体信息存储环境的结构模型,基于该实现的存储环境,可为多媒体信息自理系统提供多种信息类型在多种表示层次上的分布存储,实现多媒体信息的相互调用的转换。     

多媒体节目时序描述的组合技术

组合性是形式描述研究的基本问题,便于大型程序的设计、分析、测试和复用.为了方便用户编制大型多媒体系统的时序描述,组合模型是必须的.目前,这样的模型有基于语言的、基于图形的、基于时间区间的和面向对象的等等.但是,这些模型描述层次过低,很难支持两个多媒体节目之间的时序描述.通过引入单位流的概念和扩展两种时序关系,研究一种多媒体节目时序描述的结构化技术,使复杂的多媒体节目易于理解,以方便用户运用组合方法把一些可以复用于不同多媒体节目的节目模块进行组合设计.     

A lightweight framework for authoring XML multimedia content on the web

This paper addresses the issue of authoring XML multimedia content on the web. It focuses on methods that apply to different kinds of contents, including structured documents, factual data, and multimedia objects. It argues in favor of a template-based approach that enhances the ability for multiple applications to use the produced content. This approach is illustrated by AXEL, an innovative multipurpose client-side authoring framework (previously described in Sire et al. (2010)), intended for web users with limited skills. The versatility of the tool is illustrated through a series of use cases that demonstrate the flexibility of the approach for creating various kinds of web content.     

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.     

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.     

多媒体编著语言的设计与实现

根据基于时序逻辑和XYZ系统思想的多媒体数据描述模型,设计并实现了一种新的多媒体编著语言MAL(multimedia authoring language),该语言具有抽象描述、同步描述、逐步求精设计的描述等能力,将多媒体节目中媒体对象的建模和多媒体节目的设计过程在一个统一的框架内进行描述.以该语言实现为核心，研制了一个交互式可视多媒体编著环境.     

Canonical processes for creating personalized semantically rich multimedia presentations

Authoring of multimedia content can be considered as composing media assets such as images, videos, text, and audio in time, space, and interaction into a coherent multimedia presentation. Personalization of such content means that it reflects the users’ or user groups’ profile information and context information. Enriching the multimedia content with semantically rich metadata allows for a better search and retrieval of the content. To actually create personalized semantically-rich multimedia content, a manual authoring of the many different documents for all the different users’ and user groups’ needs is not feasible. Rather a (semi-)automatic authoring of the content seems reasonable. We have analyzed in detail today’s approaches and systems for authoring, personalizing, and semantically enriching multimedia presentations. Based on this analysis, we derived a general creation chain for the (semi-)automatic generation of such content. In this paper, we introduce this creation chain. We present our software engineering support for the chain, the component framework SemanticMM4U. The canonical processes supported by the creation chain and SemanticMM4U framework are described in detail. We also provide an explicit mapping of SemanticMM4U framework components to the processes and argue for the benefits of defining canonical processes for creating personalized semantically rich multimedia presentations.     

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.     

Modelling Reactive Multimedia: Design and Authoring

Multimedia document authoring is a multifaceted activity, and authoring tools tend to concentrate on a restricted set of the activities involved in the creation of a multimedia artifact. In particular, a distinction may be drawn between the design and the implementation of a multimedia artifact.This paper presents a comparison of three different authoring paradigms, based on the common case study of a simple interactive animation. We present details of its implementation using the three different authoring tools, MCF, Fran and SMIL 2.0, and we discuss the conclusions that may be drawn from our comparison of the three approaches.Simon Thompson is grateful to the British Council for its funding of travel in support of the work reported here.Supported by an individual research grant from NSERC. This author’s research was performed, in part, at LIRMM, Montpellier, France.Supported by an individual research grant from NSERC.     

Constraint Techniques for Authoring Multimedia Documents

Authoring a multimedia document requires to specify both its spatial layout and its temporal organization, i.e. when and where objects such as pictures, texts and videos appear/disappear on /from the screen and when objects such as audios and videos start/end to play. In this paper, we present some benefits authors can gain when using an authoring tool in which constraints are used to specify these two kinds of information. We describe our experience in building Madeus, a constraint-based environment to design multimedia documents and we point out technical problems that still need to be solved to more completely satisfy author requirements.