JPEG2000中小波变换在BlackFin芯片上的实现

对JPEG2000中小波变换的具体算法进行了阐述并在BlackFin芯片(ADSP-BF533)上对算法进行了实现。首先给出小波变换滤波器的基本结构,然后介绍了小波正变换,二维子带系数的分解,垂直、水平方向的子带分解,二维系数的反交错,一维小波变换等步骤如何对原始图像信号进行处理,最后,选用BlackFin芯片(ADSP-BF533)进行了编程实现。     

JPEG2000中小波变换在BlackFin芯片上的实现

对JPEG2000中小波变换的具体算法进行了阐述并在BlackFin芯片（ADSP-BF533）上对算法进行了实现。首先给出小波变换滤波器的基本结构，然后介绍了小波正变换，二维子带系数的分解，垂直、水平方向的子带分解，二维系数的反交错，一维小波变换等步骤如何对原始图像信号进行处理，最后，选用BlackFin芯片（ADSP-BF533）进行了编程实现。     

基于ZigBee的图像采集传输系统的设计与实现

介绍了一种基于ZigBee的图像采集传输无线多媒体传感网络系统的设计与实现。系统采用JPEG压缩摄像头及CC2530无线SoC芯片构成节点,实现了参数设置、图像浏览、拓扑结构显示、数据分析和列表等功能,能够实现图像的采集和无线传输。系统具有自组织组网、多种供电方式、功耗低、稳定性强、可扩展性好等特点。     

基于ZigBee协议的图像无线传输系统设计

本文提出了基于无线传感器网络的图像无线传榆系统.该系统以OV528作为JPEG图像数据压缩芯片,采用支持ZigBee协议的JN5121作为数据传输主控芯片,构成MESH结构的无线传感器网络,该无线传感器网络可以将JPEG图像数据发送到多个监控点.所提出的基于ZigBee协议的图像无线传输系统能耗极低、数据传输安全而且数据传输完全免费,具有较高实用价值,可以广泛地用于灾害监控、汽车防盗、安全监控等领域.     

基于FPSLIC带MP3功能的数码相机

介绍一种基于FPSLIC带MP3功能的数码相机的设计与实现过程。它以最新的片上系统芯片FPSLIC作为核心处理器,实现了图像采集、JPEG2000压缩和U盘的图像存储。同时,它还提供MP3音乐播放和蓝牙无线接口,是一种功能强大、低功耗的便携式数码相机。     

基于uClinux的嵌入式图像监控系统

介绍了一种基于uClinux嵌入式操作系统的无线图像监控系统,系统以ADI公司的Blackfin系列DSP为核心,实现了CMOS图像传感器的高速数据采集、JPEG静态图像压缩编码以及GPRS的无线数据传输;文章简要介绍了系统硬件平台的搭建,重点介绍了uClinux在Blackfin上的移植和配置过程、GPRS无线模块应用以及JPEG压缩算法的优化3个核心部分,特别详述了对PPI接口的配置和DCT变换的优化实现;实际的测试表明该系统很好地满足了设计要求,并且具有结构简单、功耗低、可扩展性强等特点。     

一种嵌入式视频监控系统的设计与实现

提出一种嵌入式监控系统的实现方法,主要是针对传统数字监控系统成本高、功耗大和图像存储占用内存大等缺点.为解决这些困难,本文采用飞利浦视频解码芯片SAA7113和JPEG 2000图像压缩技术,开发出一种嵌入式数字化监控系统.应用表明:该监控系统具有成本低、功耗小和图像占用内存小等优点.     

基于ADV202的实时窄信道视频压缩及解压缩系统设计

为了满足视频传输的高实时性和无线信道的窄信道要求,设计了一种基于JPEG2000的视频压缩及解压缩系统。通过专用芯片ADV202实现JPEG2000压缩方式,其优点是在窄信道下具有高实时性。使用FPGA实现跳像素并通过配置ADV202寄存器实现跳场减少数据,满足了窄信道下实现较低压缩率压缩视频图像的要求,提高了视频图像还原质量。     

小波滤波器低功耗并行的VLSI结构设计

提出一种基于行和提升算法,实现JPEG2000编码系统中的小波正反变换(discretewavelettransform)的低功耗、并行的VLSI结构设计方法·利用该方法所得结构一次处理两行数据,分时复用行处理器,使行处理器内以及行、列处理器实现并行处理,且最小化行缓存·对称扩展通过嵌入式电路实现,整个结构采用流水线设计方法优化,加快了变换速度,增加了硬件资源利用率,降低了功耗,效率几乎达到100%·小波滤波器正反变换结构已经经过FPGA验证,可作为单独的IP核应用于正在开发的JPEG2000图像编解码芯片中·     

基于实时视觉分析算法的智能图像传感器系统设计

设计了一种智能交通图像传感器系统以实现对监控场景的快速移动侦测和对象识别。该系统具有有线以太网和无线GPRS双重网络接入功能,硬件由基于Au1200嵌入式处理器的网络接口端和基于BlackFin 533 DSP处理器的图像分析端组成。软件系统包括运行于Au1200处理器上的基于嵌入式Linux架构的网络收发软件和运行于BlackFin 533 DSP上的视觉分析算法。本系统引入了基于区域分割的背景模型和基于特征的对象识别算法。实验结果表明该系统能够实时高效地进行自动移动检测和对象分类识别。     

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。     

基于QTE的蒙古文显示机制研究与实现

蒙古语言是中国蒙古族使用的通用语言,由于蒙古文区别于其他文字的书写方式和其自身变形机制等特点,在很多通用的文字处理引擎中都不被支持。在嵌入式产品开发与应用领域中Linux加QTE已经成为流行方式。该文给出了一种在QTE环境上实现基于标准Unicode的蒙古文点阵显示和变形算法, 并自定义了支持蒙古文的QTE组件,扩展了QTE功能,为在Linux加QTE方式的嵌入式体系结构中处理蒙古文提供了一种解决方法。