基于发布订阅结构的计算机视觉跟踪研究

文中报道了使用发布订阅中间件搭建的一个跟踪系统,通过单摄像头采集图像,经过分析处理,计算出运动物体的相对位置,同时控制摄像头转动,对运动物体进行实时追踪.整个系统主要包括4个方面,以发布/订阅为中心结构连接3个子系统、目标获取、目标跟踪、采集摄像头控制.文中为卡尔曼滤波定义了新的向量,预测目标运动趋势;根据物体的运动信息自行设计了摄像头控制程序.算法有充分的理论依据和实验验证.     

基于uIP和RFID的监狱监控系统设计和开发

针对摄像头监控系统存在视线盲区、可靠性依赖于监控人员等问题,设计了一种利用RFID技术实现定位追踪告警、uIP实现局域网通信的监狱报警系统来弥补摄像头系统的缺陷.首先介绍整个系统结构功能,然后给出下位机具体实现方法,包括MCU控制RFID集成芯片进行通信的编程实现、以太网卡驱动程序和uIP协议在MCU上的移植过程.系统经过调试,可实现定位追踪和告警等功能,证明uIP和RFID技术在监控系统中应用的可实现性.     

基于背景差分法和CAMShift法的运动目标跟踪系统的设计与实现

针对云台摄像头转动时会暂时性丢失跟踪的运动目标的问题,提出了一种基于背景差分法和连续CAMShift法的运动目标跟踪系统的设计方案。该系统在云台摄像头静止的情况下采用改进的背景差分法检测运动目标,在云台摄像头转动的过程中采用连续CAMShift法跟踪运动目标,并通过型心坐标追踪运动目标的轨迹。仿真结果表明,结合背景差分法和连续CAMShift法的运动目标跟踪系统在一定程度上满足了实时性与稳定性的要求。     

PTZ摄像头下候选区匹配的实时目标跟踪

提出一种基于候选区匹配的控制PTZ(Pan,Tilt,zoom)摄像头的目标跟踪方法.该方法将图像的中心区域或者检测的目标运动区域作为候选区对目标定位,并根据目标的预测位置计算摄像头运动参数,实现摄像头自动控制跟踪目标.采用对称差分来检测图像中的目标运动区域,利用颜色和纹理信息等特征来表示目标,通过相似性度量从候选区定位目标.同时考虑摄像头命令的传输和执行延时,利用目标运动轨迹对目标位置加以预测,并根据目标预测位置自动控制PTZ摄像头主动追踪目标.实验表明,该方法在较大区域内,以及瞬时遮挡条件下,能连续实时地主动追踪感兴趣目标.     

基于改进SSD的电力检修多目标人员追踪方法

随着计算机人工智能领域的日益飞速发展, 对摄像头数量要求日益增加, 视频数据量也在迅速增加, 视频下的人形轨迹安全监控跟踪, 是大规模智能监控系统的重要研究方向. 考虑到安全管控现实场景中不同摄像头的光照亮暗程度和每帧图片的人形角度、尺寸等的差异, 会影响人形追踪的准确度, 为此提出具有快速优势的CSSD网络(Correct Single Shot multi-box Detector, CSSD)和关联分析应用于人形目标追踪. 本文基于行人多目标追踪技术基础, 提出了一种CSSD网络来进行模型的检测, 并使用简单的卡尔曼滤波方法跟踪预测目标的位置状态, 预测检测框位置, 使用IOU方法和匈牙利算法来解决视频连续前后帧目标匹配问题. 经验证, 该方法可以有效地提高人形目标准确率, 缓解目标之间的部分遮挡和位置突变问题, 能最大程度的适应目标的尺寸、远近和角度改变等.     

基于非重叠多摄像头的实时监控系统

针对室内外环境的动态特点,描述了一个可扩展的多摄像头实时监控系统,提出了新的基于非重叠多摄像头的运动目标跟踪方法.该方法利用亮度信息在单摄像头内检测和跟踪目标,结合运动目标的亮度特征和路径特征,在多摄像头内估计运动目标外形变化,并建立运动目标路径模型,使用融合算法实现基于非重叠多摄像头的目标跟踪.与其他监控系统相比,该系统不要求摄像头校准,在有亮度变化的非重叠多摄像头场景中能立即准确跟踪目标.实验证明,提出的方法有好的跟踪效果.     

移动目标追踪系统的设计及实现

移动目标追踪系统是实现一款智能小车对运动的物体进行识别、循迹、追踪等。采用智能路径规划方法,借助STM32主控制芯片,以其丰富的硬件资源为基础,连接可编程的OPENMV摄像头模块、电机驱动模块、电机和编码器,使用C语言进行控制编程,设计了一款移动目标追踪系统;摄像头对物体采集图像,计算出物体的坐标和物体与小车的距离,传给主控制器;主控制器将小车的坐标与小车到物体的距离作为PID算法的输入,通过优化后的PID算法调节PWM去控制电机运行,完成对物体的循迹、追踪。实验结果表明,在优化后的PID算法的控制下,无论物体是运动还是静止,小车都能够比传统的PID算法控制更加快速、稳定的追踪到物体,直到小车追踪到物体并且稳定的保持相对静止状态。     

巡逻机器人的图像采集与处理技术研究

针对固定摄像头无法移动监控的问题,设计了一款基于图像采集与处理技术的巡视机器人.通过安装在机器人上的摄像头可以对监控区域进行实时的监测,实现对运动目标识别并追踪.论文使用COMS传感器的摄像头来实现图像采集,使用Python语言对图像灰度变换、滤波等算法的调试,还用到了Opencv中功能丰富的函数库.最终实现图像快速分析,并可以实现目标的匹配任务,从而提高了移动目标跟踪的可靠性.     

基于WiFi的远程目标跟踪系统设计

提出了远程目标跟踪系统的概念并实现一种远程目标跟踪系统.系统主要分为移动机器人端和远程服务器端,主要功能是移动机器人通过USB摄像头采集到实时现场视频,将实时采集到的现场视频从YUV格式硬编码为H.264格式,再通过WiFi传出给远程服务器,服务器将接收到的视频流解码并对指定目标进行跟踪算法处理后控制移动机器人追踪目标.实验结果表明:该系统可以有效实现远程的目标跟踪,验证了该设计的可行性.     

苹果公布未来头显的眼动追踪系统及Memoji新专利

近日,美国专利商标局又公布了苹果公司的几项新专利申请,其中包括涉及未来Mac和头戴式设备的眼动追踪系统,以及一项与Memoji相关的专利. 在第一份更新的眼动追踪系统专利中,我们看到苹果公司描述了下面的专利图,该图说明了未来可能的Mac眼动追踪系统的示意图. 该眼动追踪系统包括一个眼动追踪装置,该装置包括一个成像装置,被配置为拥有至少一个摄像头,能够捕捉到用户的至少一只眼睛的图像.     

Call for Papers The 6^th International Conference on Grid and Cooperative Computing

Recent years have seen rapid advances in various grid-related technologies, middleware, and applications. The GCC conference has become one of the largest scientific events worldwide in grid and cooperative computing. The 6th international conference on grid and cooperative computing (GCC2007) Sponsored by China Computer Federation (CCF),Institute of Computing Technology, Chinese Academy of Sciences (ICT) and Xinjiang University ,and in Cooperation with IEEE Computer Soceity ,is to be held from August 16 to 18, 2007 in Urumchi, Xinjiang, China.     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

法律信息库系统

本文分析了法律数据库的结构和特点，介绍了采用面向对象设计方法和超文本数据库技术开发和实现法律信息库系统将作为重要网络资源之一为不同用户进行法律咨询服务。     

View-based model-driven architecture for enhancing maintainability of data access services

In modern service-oriented architectures, database access is done by a special type of services, the so-called data access services (DAS). Though, particularly in data-intensive applications, using and developing DAS are very common today, the link between the DAS and their implementation, e.g. a layer of data access objects (DAOs) encapsulating the database queries, still is not sufficiently elaborated, yet. As a result, as the number of DAS grows, finding the desired DAS for reuse and/or associated documentation can become an impossible task. In this paper we focus on bridging this gap between the DAS and their implementation by presenting a view-based, model-driven data access architecture (VMDA) managing models of the DAS, DAOs and database queries in a queryable manner. Our models support tailored views of different stakeholders and are scalable with all types of DAS implementations. In this paper we show that our view-based and model driven architecture approach can enhance software development productivity and maintainability by improving DAS documentation. Moreover, our VMDA opens a wide range of applications such as evaluating DAS usage for DAS performance optimization. Furthermore, we provide tool support and illustrate the applicability of our VMDA in a large-scale case study. Finally, we quantitatively prove that our approach performs with acceptable response times.     

International Journal of Automation and Computing Table of Contents

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Information for authors

正SCIENCE CHINA Information Sciences(Sci China Inf Sci),cosponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China,and published by Science China Press,is committed to publishing highquality,original results of both basic and applied research in all areas of information sciences,including computer science and technology;systems science,control science and engineering(published in Issues with odd numbers);information and communication engineering;electronic science and technology(published in Issues with even numbers).Sci China Inf Sci is published monthly in both print and electronic forms.It is indexed by Academic OneFile,Astrophysics Data System(ADS),CSA,Cabells,Current Contents/Engineering,Computing and Technology,DBLP,Digital Mathematics Registry,Earthquake Engineering Abstracts,Engineering Index,Engineered Materials Abstracts,Gale,Google,INSPEC,Journal Citation Reports/Science Edition,Mathematical Reviews,OCLC,ProQuest,SCOPUS,Science Citation Index Expanded,Summon by Serial Solutions,VINITI,Zentralblatt MATH.     

Erratum to: Fast global kernel fuzzy c-means clustering algorithm for consonant/vowel segmentation of speech signal

正Erratum to:J Zhejiang Univ-Sci C(ComputElectron)2014 15(7):551-563doi:10.1631/jzus.C1300320The original version of this article unfortunately contained mistakes.Algorithm 6 should be as follows:Algorithm 6 FGKFCM-F clustering Input:(1)X={x_1,x_2,…,x_N},,x_iR~d,i=1,2,…,N,the dataset;(2)C,1C≤N,the number of clusters;(3)ε0,the stopping criterion;     

Journal of Zhejiang University-SCIENCE C (Computers & Electronics) Total contents

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A pragmatic multi-method investigation of discrepant technological events: Coping,attributions, and ‘accidental’ learning

Discrepant technological events or situations that entail a problem, a misunderstanding or a difficulty with the Information Technology (IT) being employed, are common in the workplace, and can lead to frustration and avoidance behaviors. Little is known, however, about how individuals cope with these events. This paper examines these events by using a multi-method pragmatic approach informed by coping theory. The results of two studies – a critical incident study and an experiment – serve to build and test, respectively, a theoretical model that posits that individuals use a variety of strategies when dealing with these events: they experience negative emotions, make external attributions, and adopt engagement coping strategies directed at solving the event, eventually switching to a disengagement coping strategy when they feel they have no control over the situation. Furthermore, users’ efforts may result in ‘accidental’ learning as they try to overcome the discrepant IT events through engagement coping. The paper ends with a discussion of the results in light of existing literature, future opportunities for research, and implications for practice.