基于ARM的远程视频监控系统设计

着眼视频监控网络化发展需求,开发了一种基于ARM的远程视频监控系统;系统的硬件以ARM S3C2440嵌入式芯片为核心,设计了硬件系统的电源、以太网接口、JTAG接口、数据存储等主要模块的电路结构;系统的软件以Linux为操作系统,利用Vide-o4Linux完成视频图像的采集,采用JPEG图像压缩技术实现视频的压缩处理,并用实时传输协议RTP实现对视频图像的封装和网络传输、控制;测试结果表明,该视频监控系统硬件结构小、功耗低、占用资源少,启动时间仅需20ms,网络实时视频图像传输速率达到25～30fps,实现了远程视频图像的实时网络化传输,具有一定的实用价值。     

交通监控视频压缩与网络传输系统设计

针对现有交通监控视频中采用的H.264算法复杂度高、运算量大、误码跨帧传播等问题,提出了基于专用编解码芯片ADV212硬件实现JPEG2000标准的视频压缩传输系统的设计方法;设计以ADV7180对PAL制式模拟视频进行采集,以ADV212完成对采集后视频数据的压缩处理,最后通过DM9000A实现对压缩数据的以太网传输;FPGA作为系统主控,主要实现对各芯片的初始化及逻辑控制;实验结果表明,在保证压缩图像具有较高峰值信噪比的情况下,系统对速率为166 Mbps的视频图像进行压缩处理后输出速率为8 Mbps,有效减轻了网络传输带宽压力,且便于网络终端进行视频数据存储;同时系统还具有集成度高、体积小、性价比高、压缩比可调等优点,支持多种视频监控场合使用。     

基于ARM 和DSP 的无线视频监控系统

针对视频监控设备的应用需求,设计了一种基于ARM和DSP双核结构的无线视频监控系统。该系统采用CMOS摄像头完成现场图像的采集,在DM642内经JPEG2000压缩后,由S3C2410通过DSP的HPI口读取,并通过3G网络把视频数据传输到后台服务器。详细论述了系统的软、硬件的结构及其设计思想。     

基于ARM的嵌入式网络摄像机的设计与实现

本文首先研究与设计了基于硬件压缩的网络视频监控系统各硬件结构,然后在此基础上完成了系统底层软件的设计,经过测试,达到了预期的效果。本文的研究工作,对于设计基于硬件压缩的网络视频监控系统提供了可以借鉴的设计思路,具有一定的应用价值。     

基于ARM和DSP的远程视频监控系统的设计与实现

本文提出了一种基于ARM和DSP的远程视频监控系统的体系结构,该体系结构将硬件分为两大模块,以Philips LPC2114为中央处理器的系统控制模块主要完成系统的控制功能 ,以Blackfin ADSP-BF533为中央处理器的图像处理模块主要完成御EG4视频流的压缩及自适应网络传输。本文还介绍了嵌入式网络视频服务器和远程控制平台的软件设计与实 现。通过自定义协议,系统实现了数据的可靠传输和MPEG-4视频流图像的平滑传输,各项指标均符合设计要求。     

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无线传输的图像监控终端实现

将GPRS无线传输技术运用到图像监控系统中,实现远程监控;文中首先介绍了远程图像系统的组成和网络拓扑.详细介绍了远程图像监控终端的现场视频处理模块硬件组成和GPRS Modem特性以及嵌入式软件流程;并介绍了图像监控终端的JPEG压缩流程和GPRS modem的通讯实现,通过上述技术综合应用,得到较好的效果。     

面向工业4.0的多维视频监控系统设计

针对多维视频监控受到图像噪声的影响,导致多维视频的质量变差,以提高多维视频图像的质量为目的,提出了面向工业4.0的多维视频监控系统设计;在第四次工业革命的背景下,利用多维视频采集器设计和监控网络传输接口设计,完成了系统的硬件设计;确定多维视频背景中的图片像素点,提取多维视频背景,通过低通滤波来阻止视频更新的影响,根据帧多维视频的检测结果来更新多维视频的背景,提出多维视频跟踪算法,完成了系统的软件设计,实现了多维视频的监控;测试结果表明,与其他两个多维视频监控系统相比,面向工业4.0的多维视频监控系统可以将噪声消除掉80%~90%,平均压缩比为80.004:1,平均分辨率大约为533*533 dpi,可以获得较高质量的多维视频图像。     

基于ARM+DSP的网络视频服务器的设计

网络视频服务器可对音视频数据进行编码处理并完成网络传输,实现远程监控。为了达到对高尺寸的图像进行全屏的视频压缩或无失真的压缩,并且实现图像数据在网络的高效传输,可采用一种ARM+DSP的网络视频服务器,采用TI公司高性能的DSP芯片TMS320C6415-500进行图像数据处理,用Intel公司的Strong ARM SA1110芯片掌控系统管理与网络传输。用ARM+DSP设计的网络视频服务器,采用H.264视音频压缩编码算法,图像分辨率为352×288象素,可同时访问4个网络摄像机,并输出4路视频信号,内置Webserver实现网上浏览。用ARM+DSP设计网络视频服务器是一种先进且高效的方案。     

基于DirectShow技术的远程视频监控系统

本系统是在VC＋＋平台上利用Winsock网络编程技术和DirectShow技术开发一个能实现远程视频监控的软件,用于对小区的实时监控,本系统的实现过程：首先是通过视频采集压缩卡,实现模拟视频信号、音频信号实时数字化并压缩解码。然后运用相关的网络技术知识实现视频监控网络通信。最后通过微软公司提供的DirectShow组件和filter技术．实现实时图像和视频文件的播放。     

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.