基于混合粒子滤波的运动火焰跟踪算法

提出一种基于混合粒子滤波的运动火焰跟踪算法。针对通用粒子滤波算法计算量大的问题,提出了混合粒子滤波,将Mean Shift算法嵌入到粒子滤波中,并用自适应运动模型和目标模型自动更新的策略改善算法性能。基于混合粒子滤波提出了火焰识别和火焰跟踪相结合的运动火焰自动跟踪算法,先火焰识别,再火焰跟踪,且跟踪时,如果估计目标与模型的相似度小于阈值则切换到火焰识别阶段。识别与跟踪的相互切换保证了跟踪结果的正确性。实验结果表明混合粒子滤波具有很好的跟踪效果,与粒子滤波和Mean Shift算法相比,提高了跟踪精度;基于混合粒子滤波的火焰跟踪算法能够跟踪复杂环境下的运动火焰,提供火焰的精确位置。     

基于背景优化的Mean Shift目标跟踪算法

针对传统的Mean Shift算法在目标快速运动且背景区域变化较大时,容易丢失跟踪目标的问题,提出了一种基于背景优化的Mean Shift目标跟踪算法。该算法引入混合直方图并对直方图重新量化,再通过减少背景像素在概率密度函数(PDF)中的权重来对背景进行优化,从而降低背景区域对跟踪的影响。实验结果表明,当目标快速运动,且背景区域变化较大时,该算法仍然能够实现对运动目标的准确跟踪。     

基于SIFT特征一致性的目标跟踪算法

针对光照条件突然变化情况下混合目标模型Mean Shift算法无法准确跟踪目标的缺点,提出了一种基于SIFT特征一致性的目标跟踪算法.算法用SIFT特征来匹配帧间的感兴趣区域,同时使用包含初始帧信息和前一帧信息的混合目标模型Mean Shift算法计算帧间感兴趣区域的直方图,以直方图分布距离最小为原则计算Mean Sh...     

基于边界变异的量子粒子群优化算法

将边界变异操作引入到量子粒子群优化算法中,提出基于边界变异的量子粒子群优化算法QPSOB。该算法将越界粒子随机分布在边界附近的可行域内,以增加种群的多样性、提高算法的全局搜索能力。仿真实验证明其全局收敛性能优于量子粒子群优化算法。     

基于改进Mean Shift视频目标跟踪算法的研究

针对传统的Mean Shift目标跟踪算法计算量大,难以实现对目标的实时跟踪,并且容易造成目标丢失,降低了目标跟踪的精确度;鉴于此,提出了一种改进Mean Shift的视频目标跟踪算法;首先,建立视频运动速度的系统动态模型,以便减少粒子维数粒子的数量;其次,在Mean Shift算法中核函数在目标特性的直方图表示的基础上来构建系统的观测值的获取;最后,利用Mean Shift算法的聚类作用,将粒子聚集在真实位置的区域以便更加靠近其跟踪目标;实验结果表明,验证了该算法在视频目标跟踪中,能够有效跟踪运动目标,满足实时性要求,明显优于传统的Mean Shift目标跟踪算法,减少了计算量,有助于提高其跟踪精度。     

基于粒子Mean Shift迁移的红外人体目标跟踪算法

提出了一种基于粒子Mean Shift迁移过程的红外人体跟踪方法.算法通过采样粒子迁移和聚类动态建立目标的状态模型和量测模型.在被跟踪区域随机布撒粒子,以各粒子对应像素的亮度作为特征值进行Mean Shift收敛性分析,使用收敛后的粒子集表达目标的当前状态;以状态粒子的坐标位置为特征值对其进行Mean Shift聚类,作为对目标的量测.连续跟踪时,下一帧的采样粒子基于上一帧的量测结果产生.与传统的基于序贯重要性采样的粒子滤波方法相比,算法不需要目标的相似性测度计算,仅用少数粒子即可实现对目标的可靠跟踪.     

基于粒子滤波的红外运动目标跟踪

提出一种基于粒子滤波及Mean Shift算法的红外运动目标跟踪方法。该方法首先利用目标区域的灰度分布,建立了一种基于统计直方图的系统观测概率模型,并针对红外目标机动性强,需要大量粒子才能保证算法鲁棒性的问题,将Mean Shift算法引入到粒子更新的过程中,使粒子分布在观测的局部区域内,在利用少量粒子实现分布多样性的同时,有效克服了粒子退化现象。序列图像的实验表明：该算法能够在目标高速运动或发生遮挡的情况下稳健跟踪目标,其总体性能优于传统的粒子滤波算法。     

基于DESO的Mean Shift目标跟踪算法研究

将基于DESO的运动预测算法和Mean Shift算法相结合,形成一种新的基于Mean Shift的快速目标跟踪算法.该算法以DESO预测位置作为Mean Shift算法下一帧候选模型的计算中心,实现了对快速运动目标的跟踪,并通过DESO对目标运动轨迹进行预测,较好地解决了目标完全遮挡时的跟踪问题.实验结果表明,该算法具有预测精度高、实时性好、抗遮挡能力强的优点.     

基于Mean Shift算法和粒子滤波器的目标跟踪

本文提出了一种综合Mean Shift算法和粒子滤波器的跟踪算法,该算法利用Mean Shift算法在重采样之后将粒子收敛到靠近目标真实状态的区域内,克服了传统粒子滤波器的退化现象并缩短了计算时间,而且算法在遮挡时能实现很好的跟踪．实验表明．算法的实时性得到了提高．     

基于DESO的Mean Shift目标跟踪算法研究

将基于DESO的运动预测算法和Mean Shift算法相结合,形成一种新的基于Mean Shift的快速目标跟踪算法.该算法以DESO预测位置作为Mean Shift算法下一帧候选模型的计算中心,实现了对快速运动目标的跟踪,并通过DESO对目标运动轨迹进行预测,较好地解决了目标完全遮挡时的跟踪问题.实验结果表明,该算法具有预测精度高,实时性好,抗遮挡能力强的优点.

     

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。     

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.     

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.     

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。     

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.     

基于AD9626的模拟信号采集存储卡设计

自然界的绝大部分信号都是以模拟的形式存在,因此模拟信号的采集转换存储在数字时代十分关键。文章讨论了在雷达信号处理领域基于AD9626的AD采集存储卡的设计原理、硬件结构和程序设计与芯片配置等问题,为今后相关领域的研究提供了可参考的方案。     

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     

A human-computer interface for non-computer specialists

The COM teleconferencing system was designed to be easy to use for both beginners and people with much computer experience. A number of design choices in organizing the human-computer interface were considered very carefully. These design problems are not unique for teleconferencing applications, but will appear in many other developments of human-computer interfaces for non-computer specialists. This report discusses naming conventions, menu format, user commands, help facility and the treatment of ‘type ahead’ from the users.