基于边界的车道标识线识别和跟踪方法研究

在道路图像中，为了得到较理想的车道的标识边缘，该文采用基于LOG算子边缘增强的方法得到梯度图像，利用SUSAN算子对该梯度图像进行分割，实现了车道标识线边界的提取。在分割后的梯度图像中，利用Hough变换提取出车道标识线参数，完成了对道路图像中的车道标识线的识别，采用建立梯形的感兴趣区域的办法，实现了对车道标识线的实时跟踪。试验结果表明该方法具有较强的鲁棒性和较好的实时性。     

缩微交通环境下的车道标识线检测

为了解决缩微交通环境下的车道标识线检测问题,提出了一种数学形态学与概率霍夫变换相结合的车道标识线检测方法。首先运用灰值腐蚀膨胀对道路图像进行滤光处理,去除光照影响,然后利用自适应阈值二值化图像,最后利用概率霍夫变换寻找车道标识线。实验结果表明,在缩微交通环境下该方法能够准确地检测出车道标识线,具有很强的鲁棒性。     

车道标识线识别和跟踪方法研究

为了得到比较理想的道路图像中车道标识的边缘,文中采用了基于二维直方图熵最大化的车道标识边缘提取方法。对此边缘图像采用定向边界跟踪方法提取出车道标识特征点,对这些特征点采用线性回归技术就可以得到车道标识线参数,从而完成对道路图像中的车道标识线的识别,并且文中还采用了建立梯形的感兴趣区域的办法实现了对车道标识线的实时跟踪。     

复杂工况下视觉AGV导航标识带中心线的提取研究

针对光照不均匀、导航标识带破损、少量杂物干扰的复杂工况条件下,对视觉AGV采集到的路面导航标识带图片进行特征提取,采用灰度化、中值滤波进行了图像预处理,研究了Otsu法和迭代法等动态阈值分割算法以及形态学在图像分割中的应用,并对预处理图像作了分割对比实验;然后对分割后的图像进行边缘提取,分析了基于最小二乘法和Hough变换算法的直线拟合原原理,提出了Hough算法下基于边缘线的中心线拟合算法,并作了直线拟合对比试验;实验表明,复杂工况下,采用基于形态学和Otsu算法相结合的方法对图像进行分割,得到的二值图像边界更完整,效果更好,基于Hough变换算法较最小二乘法能更精确有效地提取出导航标识带中心线及其方程。     

强光照条件下车道标识线识别与跟踪方法

为了实现强光照条件下车道标识线的准确识别和跟踪,采用基于直方图锥形拉伸算法对原始图像进行处理,以提高图像整体对比度,利用SUSAN算法提取出处理后图像中的边缘,对边缘图像利用定向边界跟踪算法进行滤波,利用Hough变换提取出车道标识线参数完成对道路图像中的车道标识线的识别,最后采用建立梯形感兴趣区域来实现对车道标识线的实时跟踪.试验结果表明该方法具有较强的鲁棒性和较好的实时性.     

一种阴影及破损车道线识别方法研究

为了满足车道线识别算法在车道线存在阴影遮挡、破损及污迹覆盖情况下的适应能力,提出了一种新的、有效的识别算法。将原始道路图像灰度化后,采用中值滤波去除图像采集过程中引入的噪声。利用对称局部阈值分割算法对去噪后车道线进行特征提取;并将提取结果与经典分割算法进行对比分析。基于提取出的车道线特征点的分布规律,提出应用改进的RANSAC算法进行车道线识别。分别对在普通公路和高速公路上所采集的视频图像进行实验测试,结果表明,当车道线严重破损、完全被阴影遮挡以及被大面积污迹覆盖的情况,识别算法都能准确地将其识别。     

一种照度自适应车道检测算法及多核平台实现

针对车道线检测,基于图像白平衡算法和灰度直方图,自适应地提取出感兴趣区域,并自适应确定Canny边缘检测算法的高低阈值.通过对概率霍夫变换得到的直线点集进行RANSAC拟合,满足了在不同光照条件下的自适应车道线检测,并基于英伟达Jetson TK1嵌入式开发板结合开源GUI库Qt,使用其Qt Quick开发出一套车道线检测系统.     

一种改进的自适应阈值前景提取方法*

为了尽可能完整地提取前景,针对视频处理中提取的前景区域出现断层导致单个目标出现分裂的问题,提出了一种改进的自适应阈值前景提取方法.该方法是在非模型法产生背景模型的基础上,通过背景差法获取差分图像,利用环境噪声的相对稳定性,建立一张环境噪声分布图,进而滤除差分图像中存在的环境噪点,自适应求取分割阈值,进行图像二值化处理获取前景区域.实验结果表明,该方法能明显改进前景提取效果,最大化提取目标的完整性.     

一种新的肤色相似度图自适应阈值选取方法

针对复杂背景图像,基于肤色相似度直方图最低波谷自适应阈值选取法分割提取肤色区域效果不理想,提出第一波谷自适应阈值选取法.实验结果表明,该方法对复杂背景图像的肤色区域分割提取效果较为理想.     

基于单目视觉的障碍物检测方法研究

为了解决车辆的碰撞问题,提出了一种基于单目视觉的车道标识线二维重建及障碍物检测与跟踪的方法.主要采用最大类间方差法对初始图像进行分割,给出一种新的车道标识线特征点搜索策略,用统计模型的方法获取车道线参数.利用障碍物(前方车辆)在道路中留下的阴影,检测车辆边缘并确认车辆存在,运用卡尔曼滤波方法跟踪车辆具体位置.所设计的方法能够准确地检测跟踪车道线及前方障碍物.实验结果表明:方法满足车辆安全行驶的前提需要,具有较高的准确性和实时性.     

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.