基于符号特征的QR码识别算法

在传统QR码识别算法基础上,提出一种利用QR码自身的符号特征进行识别定位的改进算法。对采集到的图像进行二值化处理,由符号特征定位QR码在采集图像中的位置,通过改进的双线性变换校正在采集过程中引起的图像几何形变,并通过逐模块垂直投影提取条码信息。实验结果表明,该算法具有识别时间短、识别率高等特点。     

基于DM642的手机QR码检测与识别

基于市场上二维条码设备的广泛需求,研究了基于DM642的QR码的检测与识别技术.本文针对嵌入式智能设备获取的QR码（Quick Response Code,QR）图像严重倾斜与高度畸变问题,提出了基于位置探测图形的轮廓嵌套特性与轮廓之间面积比例关系来实现QR码定位的算法,接着以直线逼近的方法精确定位QR码的4个角点,然后运用逆透视变换与旋转校正的原理实现QR码的复原操作,最后基于复原后的图像通过网格采样来获取整个二维码的“01”矩阵,以便于后面的QR码解码.最终将算法移植到DM642上运行,能有效解决图像倾斜与畸变问题且解码效果良好.     

QR码纠错码原理及实现

二维条码长期暴露于印刷品表面,很容易受到污损破坏,为了达到预期的识别效果,除了要设计合理条码结构外,还需要采用一种纠错能力强的纠错算法。为此,分析了QR码的结构组成以及RS纠错码的编译算法及原理;并通过实例对RS码在QR码中的编译码算法及过程进行了研究,研究结果表明RS码在QR码的编译过程中能够达到快速、准确的识别效果。     

WINCE平台上S3C6410的QR码识别系统设计

为了推广二维条码在嵌入式系统的应用,本文设计并实现在S3C6410开发板上基于WINCE平台的QR码识别系统。简单介绍QR码的基本结构,分析研究QR码图像的灰度化、中值滤波、二值化等预处理,以及QR码的定位及矫正。重点讨论实时图像采集问题。系统经使用具有很好的稳定性及较高的条码识别率。     

基于离散小波变换的QR二维条码防伪技术

基于数字水印的快速响应矩阵（QR）二维条码防伪技术的水印容量低、防伪效果差。为解决该问题,提出QR码二值图像Rand灰度化和背景图灰度化方法,以提高防伪水印容量。QR码二值图像灰度化的程度由灰度化阈值决定,并且可以根据实际应用需要灵活确定。在此基础上,设计基于离散小波变换的QR二维条码防伪水印方案,通过量化函数实现水印的嵌入和检测,利用混沌密钥生成的二维混沌序列控制水印嵌入和检测的位置。实验结果表明,该方案在确保条码信息可识别的条件下,提高了QR码防伪水印的性能。     

QR码图像的矫正与定位方法研究

QR二维条码作为一种可高速、全方位识别的二维条码，已经在各行各业中得到了广泛的应用。本文针对QR条码图像的识别过程中可能遇到的图像倾斜、几何失真等问题进行了研究，提出了通过双线性变换矫正变形的条码图像，然后使用QR条码符号特性对图像进行旋转并定向。实验证明，本文的方法简单有效，可以用于提高QR条码的正确识别率。     

基于最大似然法的超分辨率合成的 QR 条码识别方法

QR 条码具有小存储空间、大容量、容错能力强和译码可靠性高等优点,在流通和物流等领域被广泛应用。但是在实际识别时,由于受拍摄条码分辨率低等因素制约,存在识别困难的问题。论文提出一种基于超分辨率图像处理技术的低分辨率 QR 码识别方法,对手机等简易设备拍摄的低分辨率条码视频,采用最大似然算法对各帧图像进行非线性拟合,然后通过 QR 码的二值特性合成超分辨率条码图像,可以提高低分辨率条码视频的识别准确率。实验证明,该方法能解决传统方法不能识别的 QR 条码,使像素为55×55的低分辨率条码识别成功率达到85％以上,平均识别准确率提高10％。     

二维条码的识别方法

以QR矩阵码为例,介绍一种实用的二维条码识别算法。首先探讨了二维条码的定位与分割算法,利用Hough变换与Sobel边缘检测把条码图像从原始采集的图像中有效地分割出来;然后分析了条码图像经过光学系统的噪声模型,提出了一种计算点扩展函数标准方差的算法;采用Flourier变换自适应地选取阈值去除噪声导致的无效边界,从而得到条码的基本模块。实验结果表明,该算法具有很好的抗噪性,提高了二维条码的识别率。     

一种快速的QR码图像去模糊方法

具有摄像功能的手机已经成为一种便捷的二维条码阅读器,但手机因为本身的限制造成拍摄图像模糊,影响了后续的条码识别。本文提出了一种适合在手机平台上的图像盲恢复方法,以QR码识别为应用目的,利用QR码图像的灰度分布特点,通过模糊图像的边缘响应计算得到PSF函数,再进行图像恢复。实验证明,本文提出的方法具有去模糊效果好、计算简单的特点,适合手机等嵌入式平台的实时应用。     

DataMatrix条码的畸变校正

条码在使用过程中出现的污染、缺损、仿射变换和边缘模糊等畸变给条码识别带来困难。为提高条码码字的切割和识别的准确度,本文提出了一种矩阵式二维条码的畸变校正算法,采用凸包运算精确定位奈码图像的边界和四个顶点,并采用控制点法校正条码图像。实验表明,该方法简单、易于实现并且效果好。     

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     

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.     

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。