基于改进颜色直方图和灰度共生矩阵的图像检索

针对传统颜色直方图提取的颜色特征维数高、传统灰度共生矩阵忽视纹理方向等问题,提出一种融合改进的颜色直方图和灰度共生矩阵算法的新图像检索算法。利用K-means聚类对检测图像进行颜色聚类以降低图像颜色数;在HSV空间进行矢量化编码,统计图像码字形成颜色直方图以提取颜色特征;利用灰度共生矩阵提取检测图像的4个特征值,利用方向测度引入权值因子,将其与4个特征值融合,对融合后的各分量进行高斯归一化后形成纹理特征向量;最后,采用加权平均融合颜色和纹理的特征距离。与其他两种算法相比,仿真实验表明本算法对一般图像和有纹理倾向的图像有较高的查全率和查准率。     

一种基于基元的彩色图像检索方法

结合基元与颜色特征,提出一种基于基元的彩色图像检索算法,该算法首先将彩色图像从RGB颜色空间转换到HSV空间上,并将图像量化为256种颜色,然后定义五种基元类型对图像进行基元分析得到基元图,利用颜色直方图描述基元图的颜色特征,利用改进的直方图相交算法进行相似度度量。实验结果表明：提出的算法能有效地去除背景颜色对图像目标的检索影响,而且较之用灰度边缘检测的边缘代替彩色图像边缘而进行的检索,能更好地反映彩色图像的纹理和边缘特征,具有较高的查准率和查全率。     

基于图像能量谱直方图的纹理检索算法RAH

本文提出的基于纹理的图像检索算法RAH是以图像的能量谱直方图为基础,包括以下两个方面：第一,计算图像能量谱的半径和角度直方图的方法以及基于图像能量直方图的频率去提取纹理特征的算法;第二,基于纹理特征的相似度检测方程。这个实验结果表明,RAH算法优于一般的灰度共生矩阵纹理检索算法,具有较好的检索效果,比较适用于基于内容的图像检索。     

一种基于多特征融合的彩色图像检索方法

提出了一种基于特征融合的图像检索方法。利用图像的HSV直方图特征建立图像颜色直方图,并采用直方图二次式距离公式取得图像相似性度量值;利用图像的纹理特征建立256维的LBP特征向量,并利用欧式距离取得相似性度量值;通过两特征融合的方法取得图像检索中关键图和检索图之间的相似度值,使得检索取得更好的效果。实验表明,在查准率和...     

基于复杂特征融合的改进mean shift目标跟踪

提出一种融合Gabor小波纹理特征与颜色特征的改进mean shift目标跟踪算法.首先,提取移动目标的颜色特征和纹理特征直方图;其次,基于mean shift算法定义融合相似度系数,对特征空间进行融合并得出目标中心位置;再次,通过定义特征自适应系数来融合基于颜色和纹理特征的目标位置;最后,对上述结果进行处理,得到目标最终位置.实验结果表明,该算法在跟踪目标存在变形、噪声、遮挡时能够得到比较理想的跟踪效果.     

基于融合特征的SURF配准算法

SURF算法是一种尺度不变、旋转不变且鲁棒性良好的配准算法,但其丢失了图像的颜色特征,因此对于彩色图像的配准效果不佳。为此,提出了一种基于融合特征的SURF配准算法。该算法首先利用彩色图像的颜色不变量和DLBP纹理特征构造融合特征灰度图,并提出了一种基于彩色图像颜色直方图的自适应方法来调节融合特征的权重;然后,利用SURF算法在融合特征灰度图上进行特征点的提取与匹配;最后,使用改进的RANSAC算法去除误匹配点。实验结果表明,对于彩色图像,此算法有效地增加了提取的特征点数,并加快了配准速率。     

基于SLIC融合纹理和直方图的图像显著性检测

针对基于颜色直方图的显著图无法突出边缘轮廓和纹理细节的问题,结合图像的颜色特征、空间位置特征、纹理特征以及直方图,提出了一种基于SLIC融合纹理和直方图的图像显著性检测方法。该方法首先通过SLIC算法对图像进行超像素分割,提取基于颜色和空间位置的显著图;然后分别提取基于颜色直方图的显著图和基于纹理特征的显著图;最后将前两个阶段得到的显著图进行融合得到最终的显著图。此外,通过简单的阈值分割方法得到图像中的显著性目标。实验结果表明,与经典显著性检测算法相比,提出的算法性能明显优于其他算法性能。     

融合颜色与纹理特征的粒子滤波目标跟踪

针对采用单一颜色特征的粒子滤波目标跟踪算法在背景相似、光照变化复杂的场景下会导致跟踪失败的问题,提出一种基于LBP纹理和颜色特征融合的粒子滤波跟踪目标算法。综合加权颜色直方图和LBP纹理直方图进行目标特征描述,建立目标观测模型;同时粒子滤波进行状态预测,利用Bhattacharyya系数进行相似度测量,作为目标区域参考模型更新准则,实现权值更新;最后对权值归一化处理,得到目标位置状态的最终估计。实验结果表明该算法不仅提高了跟踪方法的鲁棒性,而且在目标遮挡、光照变化等干扰下,具有较好的准确性。     

基于图像颜色纹理的均值漂移分割算法

针对传统均值漂移算法对图像纹理特征不敏感的不足,利用图像纹理特征的独特性,提出了一种基于颜色纹理的均值漂移分割算法.结合欧式距离和高斯函数计算当前像素点与其周围像素点的颜色相似度,再使用Gabor变换提取图像不同方向、尺度上的纹理特征,结合颜色的相似度,对该像素点均值漂移的过程加权.该算法充分考虑了图像纹理的周期性、尺度性以及图像颜色的关联性.实验结果表明,算法对色彩信息不明显的纹理图像有良好的分割效果,也会提高彩色图像分割结果的准确性.分割算法用于大型水上桥梁识别,能够提高桥梁识别率.     

一种海量图像下的高精度特征检索算法

传统图像关键特征二次检索算法无法计算图像纹理相似度,导致数据库中海量相似图像的检索精度偏低,查全率与查准率均不理想.为此,设计新的基于灰度直方图的图像关键特征二次检索算法.采用中值滤波将某像素点灰度值替换成相邻区域像素点灰度中值,去除图像背景及噪声干扰.建立归一化灰度共生矩阵,并向量化输入图像并计算其灰度特征矢量.利用...     

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     

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。     

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。