基于AT2401的MPEG-4嵌入式视频监控系统的实现

MPEG-4标准是目前视频监控应用中最先进的压缩方法。本文在对MPEG-4编码原理进行研究后，提出了一种基于MPEG-4标准的视频处理芯片AT2401的嵌入式视频监控系统的实现方法，并详细介绍了该嵌入式视频监控系统的主要功能、硬件设计和软件设计流程。该系统完全由硬件进行视频的实时压缩，通过网络可实现多路视频的远程监控。经实际应用证明，该系统稳定可靠，可满足视频监控的需求。     

基于GPRS的无线视频监控

在无线视频数字监控系统中,嵌入式技术和MPEG-4压缩编码技术越来越受关注.在研究分析了嵌入式技术和视频信号压缩技术基础上,提出了基于MPEG-4的嵌入式网络视频监控系统的设计方案,构建了基于嵌入式Linux系统和PXA255硬件平台环境,设计了视频信号采集、MPEG-4标准视频图像压缩编码和视频信号GPRS无线网络传输等功能模块,实现了基于GPRS的无线视频数字监控系统,为开发嵌入式MPEG-4数字视频监控系统的广泛应用打下了良好的基础.     

基于H.264的嵌入式视频服务器的研究与实现

介绍了一种基于H.264的四路嵌入式视频服务器的研究与实现,系统采用ARM9处理器和嵌入式Linux操作系统,实现了图像的采集、压缩和网络传输。试验证明,该方案用于视频监控是可行的。     

基于DM8168的机载高清视频编码系统的设计与实现

为解决在航空机载环境下,需要同时压缩记录多路和多制式视频信号的问题,设计实现了一个以TMS320DM8168为核心的,能够对多路高清视频进行采集、处理和压缩的高清视频编码系统,采用H.264算法对高清视频进行实时压缩编码。整个系统充分利用ARM核和DSP核的强大处理能力,经过对H.264视频编码算法的优化,整个系统能够同时处理1路分辨率1 600×1 200、4路分辨率720×576的视频和1路音频,视频压缩帧率最大能够达到60帧/s,满足了实时处理的要求,整个系统设计简单,扩展性好,处理能力强。     

双DSP的多路视频监控系统设计

采用两片TI公司的专用视频处理芯片TMS320DM642设计了一种多路视频监控系统.其中,DSPI与视频采集芯片SAA7113共同完成多路视频的采集,并拼接成一路视频图像输出;DSP2完成对DSP1输出图像的采集、压缩和视频传输.该方案结构灵活、拓展性强,可以实现4路视频的实时采集与传送.     

嵌入式矿井综合信息网关的设计与实现

针对目前矿井安全监测监控系统的应用状况,提出一种基于ARM9&Linux的嵌入式矿井综合信息系统的设计方案,可以使煤矿安全生产有根本性的改善.阐述了系统的软硬件设计方法,通过USB摄像头获取实时视频,使用Video4Linux提供的API函数设计视频采集程序,并利用MPEG-4算法实现软压缩;结合嵌入式Web技术和JRTPLIB实现流媒体数据的网络传输与访问,瓦斯等环境参数通过TCP/IP传输给力控软件.力控和GIS结合可以实现矿井数据的动态显示和灵活控制.     

基于MPEG-4的嵌入式IP网络监控摄像系统

基于MPEG4的嵌入式IP网络监控摄像系统是将智能摄像机与数字化和压缩芯片集成为一体的嵌入式视频采集及网络传输系统。采用了数字图像处理技术、MPEG-4数字音视频压缩技术、嵌入式操作系统及嵌入式操作系统软件开发技术、符合工业标准的应用接口开发技术、计算机网络通信技术等多种先进技术。     

基于ARM9+LINUX的无线视频监控系统的设计

针对目前市场对视频监控的实际需求,运用嵌入式技术、图像处理技术,设计及实现了一套可靠性高、成本低的嵌入式无线视频监控系统;系统选用S3C2440A为主控板,以Linux为内核,利用USB摄像头采集视频数据并进行JPEG压缩编码,采用基于IEEE802.11 g协议的无线局域网进行视频传输;在空旷的100米范围内进行了试验,结果表明该系统设计合理,能够出色地完成视频的拍摄,压缩以及无线传送,并且视频图像连续性好、清晰度高且稳定性强.     

Linux嵌入式视频直播监控系统

本文以嵌入式处理器和Linux为开发平台,利用嵌入式软件开发技术,Linux下图像采集技术,MPEG-4压缩技术,RTP传输技术,Linux帧缓冲机制等设计并实现了嵌入式视频直播监控系统.     

嵌入式数字视频监控系统通用存储与检索方案

为了解决现有的嵌入式数字视频监控系统的多路视频存储与检索的结构差异,从而严重制约视频监控系统的可复用性与引起系统I/O瓶颈问题,提出一种嵌入式数字视频监控系统通用存储与检索方案.采用组件化思想构建视频存储与视频检索模块,通过设计存储调度算法减少了I/O瓶颈问题,使用检索控制策略降低了检索拥塞.与以前的系统相比在支持多路视频存储与检索方面表现出改进的性能,同时具有更好的可重用性.     

Only connect: teaching, technology and telesis

Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.     

European Community policy and the market

Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.     

一种自适应子融合集成多分类器方法

融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。     

Avoiding semantic and temporal gaps in developing software intensive systems

Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.     

Designing economic np control charts: A programmed simulation approach

This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.     

The development of robot art

Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008     

Explanation and prediction: an architecture for default and abductive reasoning

Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.     

Three Process Perspectives: Organizations, Teams, and People

This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)^SM and Team Software Process (TSP){^SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.     

基于复小波噪声方差显著修正的SAR图像去噪

提出了一种基于复小波域统计建模与噪声方差估计显著性修正相结合的合成孔径雷达(Synthetic Aperture Radar,SAR)图像斑点噪声滤波方法。该方法首先通过对数变换将乘性噪声模型转化为加性噪声模型,然后对变换后的图像进行双树复小波变换(Dualtree Complex Wavelet Transform,DCWT),并对复数小波系数的统计分布进行建模。在此先验分布的基础上,通过运用贝叶斯估计方法从含噪系数中恢复原始系数,达到滤除噪声的目的。实验结果表明该方法在去除噪声的同时保留了图像的细节信息,取得了很好的降噪效果。     

How do children do mathematics with LOGO?

Abstract  This paper considers some results of a study designed to investigate the kinds of mathematical activity undertaken by children (aged between 8 and 11) as they learned to program in LOGO. A model of learning modes is proposed, which attempts to describe the ways in which children used and acquired understanding of the programming/mathematical concepts involved. The remainder of the paper is concerned with discussing the validity and limitations of the model, and its implications for further research and curriculum development.