基于彩色传递的红外与可见光图像融合方法

提出了一种基于小波分解和彩色传递理论的图像融合方法。在小波变换的基础上，采用一种融合方法对红外和可见光图像进行融合处理；基于色空间变换对灰度融合图像进行彩色传递，实现灰度到彩色图像的转变。实验表明彩色传递图像的色彩接近自然景物颜色，优于传统的假彩色方法，更有利于人眼对目标和环境的判断识别。     

基于LBP的眼睛开闭检测方法

在基于机器视觉的疲劳驾驶预警系统中通过驾驶人员眼睛的状态来判断其是否疲劳是最直接和有效的途径,对眼睛的开与闭这两个基本状态的检测是判断疲劳的一个关键技术.针对红外视频人脸图像序列,提出一种基于LBP纹理检测算子的快速准确人眼开闭检测方法.该方法首先精确提取眼睛区域,然后利用对光照具有鲁棒性的LBP纹理检测算子检测眼睛区域纹理并计算其二阶矩、熵和边际分布二阶矩作为特征向量,最后使用SVM对特征向量进行分类以达到开闭检测的目的.大量实验结果表明,该方法不仅具有较高的检测准度,而且能完全满足实时要求.     

基于邻域灰度信息的Hausdorff距离图像匹配方法

针对可见光与红外图像由于成像机理不同引起的图像灰度值差异大、边缘轮廓不一致、传统基于灰度和基于特征的匹配方法匹配概率不高等问题,在分析了各种Hausdorff距离算法的前提下,引入可见光与红外图像的灰度信息,提出一种基于邻域灰度信息Hausdorff距离的图像匹配方法。该方法在计算图像边缘特征点相似性的基础上,增加了邻域归一化灰度方差计算,有效解决了由于边缘差异引起的Hausdorff距离算法对可见光/红外图像匹配概率不高的问题。经可见光与红外图像匹配的仿真实验表明,在各种条件下,该算法与传统Hausdorff距离算法相比,有效提高了在不同光照下图像的匹配效率以及对噪声的抗干扰性能。     

基于三维Otsu法的红外图像阈值分割

常用的阈值分割方法在对红外图像进行分割时,由于红外图像本身的特点,会出现准确性不高的问题。为此,提出一种基于灰 度-平均灰度-梯度直方图的三维Otsu法,使用稀疏矩阵和改进的粒子群优化(PSO)算法,并在标准PSO算法中加入判断早熟停滞的因子,进行最佳阈值的选取,以提高运算速度,保证准确度。实验结果表明,该方法能够快速有效地对红外图像进行分割。     

医用眼睛图像中瞳孔特征值检测算法的研究

为医学上检测眼睛的需要,提出一种基于瞳孔灰度和几何特征运用数学形态学运算检测瞳孔特征值的算法.先根据瞳孔的灰度特点,用灰度投影方法确定出瞳孔的粗略中心点,以此为中心取一矩形窗口截取包含瞳孔的子图像.根据瞳孔近似圆形的几何特点,用圆盘形结构元素做重构开运算,消除光斑,运用形态学算子消除眼睫毛的干扰.通过边缘提取和圆的hough变换检测出瞳孔的边界点,获得瞳孔的特征值.试验结果表明,该算法能够有效地检测出红外和可见光眼睛图像中的瞳孔特征值,综合考虑了检测的精度和速度,满足医用眼睛图像检测的需要.     

基于序贯蒙特卡罗方法的自适应红外目标提取算法

本文将红外目标提取阈值的计算问题看作系统状态估计问题,提出了一种基于序贯蒙特卡罗方法的红外目标提取算法。在序贯蒙特卡罗方法框架下,建立关于灰度—方差加权信息熵和像素点灰度值的阈值状态空间;建立随机漂移状态转移模型;综合了红外图像中灰度、信息熵、梯度、像素点的空间位置等信息,提出了定量描述红外目标分割效果的评价函数,并以此作为系统的观测模型;最后,将粒子的加权平均做为分割阈值的估计值。实验结果表明,该方法是有效且稳健的。     

基于灰度积分投影的人眼定位

该文提出了一种基于最大类间方差阈值分割和灰度积分投影技术的眼睛定位方法。首先通过图像预处理技术中的中值滤波方法去除图像噪声,并通过非线性变换消除人脸图像因为曝光条件不同而造成的模糊,得到灰度分配较为均匀的图像,然后利用最大类间方差阈值法对图像进行二值化处理,将特征点从人脸图像分割出来,并分别利用水平和垂直灰度积分投影曲线结合人脸的结构特征找到眼睛的位置坐标,实现了准确的眼睛定位,从而为进一步提取其它特征点打好了基础。     

基于眨眼持续时间的司机疲劳检测方法

利用红外敏感的摄像机获得司机脸部图像,通过可变性模板匹配的方法对眼睛进行定位,然后利用卡尔曼滤波的方法跟踪眼睛,得到司机的眨眼持续时间参数,以此为依据判断司机是否疲劳.主要研究了其中的图像处理方法--特征提取算法和眼睛定位、跟踪算法.实验结果证明,眨眼持续时间判断是否疲劳的有效指标.     

一种人眼状态实时检测算法的研究

通过人眼图像来检测驾驶员疲劳状态是目前的主流方向,面部及眼睛定位、眼睛状态判别是其中关键环节。文中对一种基于人脸面部特征的人眼粗定位方法进行了研究。在此基础上提出一种灰度映射的方法判别人眼状态。经实验验证:该方法实时性好,对320x240的彩色图像,平均处理速度为每帧30ms。该系统对一定旋转和偏转角度,以及睁闭眼、戴眼镜等条件有很强的鲁棒性。     

一种人眼状态实时检测算法的研究

通过人眼图像来检测驾驶员疲劳状态是目前的主流方向,面部及眼睛定位、眼睛状态判别是其中关键环节。文中对一种基于人脸面部特征的人眼粗定位方法进行了研究一在此基础上提出一种灰度映射的方法判别人眼状态。经实验验证：该方法实时性好．对320×240的彩色图像,平均处理速度为每帧30ms。该系统对一定旋转和偏转角度,以及睁闭眼、戴眼镜等条件有很强的鲁棒性。     

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.     

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.     

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.     

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.     

The Distributed Time-Triggered Simulation Scheme: Core Principles and Supporting Execution Engine

Distributed real-time simulation is a young technology field but its practice is under increasing demands. In recent years the author and his collaborators have been establishing a new approach called the distributed time-triggered simulation (DTS) scheme which is conceptually simple and easy to use but widely applicable. The concept was initiated in the course of developing a new-generation object-oriented real-time programming scheme called the time-triggered message-triggered object (TMO) programming scheme. Some fundamental issues inherent in distributed real-time simulation that were learned during recent experimental studies are discussed along with some approaches for resolving the issues. An execution engine developed to support both the TMOs engaged in control computation and the TMOs engaged in DTS is also discussed along with its possible extensions that will enable significantly larger-scale DTSs.     

Software-Konfigurationsmanagement in großen Softwareprojekten

Zusammenfassung Mit zunehmender Größe der Softwaresysteme verschärfen sich die für die Software-Herstellung typischen Probleme: Beherrschen großer Objektmengen, Erhalten der Systemkonsistenz, Kontrolle der ständigen Änderungseinflüsse und Gewährleisten einer langen Lebensdauer. Die Disziplin Konfigurationsmanagement bildet den methodischen Ansatz, diese Probleme besser zu beherrschen. Software-Konfigurationsmanagement faßt die Herstellung von Softwaresystemen als eine Abfolge von kontrollierten Änderungen an gesicherten Zwischen- und Endergebnissen auf. Dargestellt werden die Objekte und Funktionen des Software-Konfigurationsmanagements sowie die hierfür in großen Software-Projekten benötigten Methoden, Instanzen und Hilfsmittel.     

Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and     

Editorial:Brain-machine interface(BMI) and cyborg intelligence

正Brain-machine interfaces(BMIs)aim at building a direct communication pathway between the brain and an external device,and represent an area of research where significant progress has been made during the past decade.Based on BMIs,mind information can be read out by neural signals to control     

Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and overseas to the world’s scientific circles,especially to stimulate     

SCIENCE CHINA Information Sciences SUBJECT INDEX TO VOLUME 57(2014)

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