一种基于视觉特性和灰度补偿改进的LDR图像增强方法

针对传统空域增强算法的不足,LDR （layered difference representation）算法构造一种二维直方图,该直方图包含像素间上下文信息。基于此,提出一种基于LDR的改进算法。该算法将视觉特性引入直方图,构造二维视觉差异直方图,再利用该直方图和LDR进行初步增强。最后采用灰度补偿方法改善过增强现象。实验结果显示该算法可产生更好的视觉效果,并适当提高整体亮度和对比度,消除人工伪影,且无需调整参数,满足实时处理的要求。     

一种适用于动态背景下的改进Camshift算法

针对摄像机运动下的目标跟踪问题,提出了一种适用于动态背景下的改进的Camshift算法.该算法用基于背景运动参数估计的二次差分法进行目标提取,跟踪过程则融合精简的主色调直方图和对遮挡与背景目标颜色相近情况具有鲁棒性的边缘方向直方图作为目标特征,以所得质心为初始搜索点,进行目标模板和候选目标相似性检测,搜索最佳匹配点得到目标对象在当前帧的准确位置.在动态背景下,该算法显著地提高了跟踪的准确性和鲁棒性.     

二维Otsu的Z字折线阈值分割方法

针对二维直方图阈值分割算法存在的因误分类而导致的分割精度下降的问题,结合二维直方图的先验知识的阈值分割方法,提出了二维Otsu的Z字折线阈值分割方法。基于二维Otsu区域斜分法的基础上进行改进。我们结合二维直方图中的边界区域和噪声区域的信息,采用Z字折线阈值作为分割标准,纠正了普遍存在的错误分类,并利用小概率事件原则自适应确定折线方程,实现高精度图像分割的同时还有效提高了算法的适应性。实验结果表明,改进方法能够有效提高图像分割的精度,增强自适应性,与同类分割算法比较,性能有了明显提升。     

基于核密度相关度量的视频目标跟踪

传统的Mean shift 方法采用颜色直方图作为特征,以Bhattacharyya系数作为目标参考模板与当前帧中候选目标间的相似度量,通过迭代寻找距离函数的局部最小值,从而得到当前帧中的目标实际位置。由于颜色直方图仅仅描述了图像中目标的全局颜色分布而忽略了空间位置分布,使得当目标邻域中存在与目标相近似的颜色模式时,算法无法取得理想的跟踪效果。本文提出了基于核密度估计相关的距离度量,在描述参考目标和候选目标时,考虑到诸如颜色、梯度等目标像点的特征区间的同时,融入了目标像点的空间位置信息,使得跟踪算法更加稳健和精确,能够更好适应目标和背景变化复杂的应用场合。     

基于计算机视觉的船模位置跟踪

针对水池实验室中船模位置的跟踪问题,提出计算机视觉跟踪的方法.首先对视频图像进行逆透视投影矫正,然后利用CamShift算法实时跟踪船模在图像中的重心位置,最后将船模的图像坐标换算成实际空间坐标,实现船模位置的精确跟踪.该方法具有系统工作稳定性高,安装简单方便,跟踪精度高、效果较好等特点,同时还可利用跟踪得到的位置坐标,计算出船模的航速和航迹向,以实现这两个状态参数的跟踪,为实时跟踪船模等课题研究打下基础.     

基于强跟踪滤波器的多传感器非线性动态系统状态容错融合估计

将强跟踪滤波理论与多传感器数据融合估计方法相结合,提出基于强跟踪滤波器的多传感器数据融合估计新算法.对拥有相同采样率的分布式多传感器单模型非线性动态系统,应用强跟踪滤波器,得到目标状态基于全局信息融合估计结果,并利用计算机仿真结果对算法的有效性进行了验证.这些工作初步解决了Kalman滤波中由于模型的不确定性而造成估计误差值偏大情况下的状态融合估计问题,从而丰富和发展了多源信息融合理论.     

雾计算使能的移动机器人编队跟随研究与设计

多机器人系统中的跟随控制一直是研究热点,新兴的雾/边缘计算技术为机器人系统设计提供了新思路。本文提出无需全局定位信息的机器人编队控制方案,在系统实现上引入雾计算技术,卸载机器人计算任务。雾计算节点提供无线网络接入,运行跟随控制程序。跟随控制方案中,利用领航者航速信息计算期望跟随轨迹;通过视觉测量方法得到实时跟踪误差;采用航速重放和PD型迭代学习控制相结合的方法实现轨迹跟踪控制。原型实验表明,雾节点提供的网络可以满足实时控制需求,跟随控制程序的卸载降低了机器人本地算力要求,并节约了25%的计算能耗。3次场试中,编队平均跟踪误差在0.05 m以内,具有较好的精度。     

基于OpenGL搭建虚拟环境的关键技术研究

虚拟现实需要搭建出虚拟世界并允许计算机和用户实时交互。OpenGL开发包为实现三维绘制提供了高效率的函数库,利用OpenGL开发包可以高效率地搭建虚拟环境中的天空和地形。在绘制天空顶时,提出用三角形逼近半圆球天空顶来提升绘制效果。在地形绘制中选用实时优化自适应网格算法,该算法能根据粗糙度和视觉距离选择绘制细节,结合OpenGL开发包剔除背面的三角形面片和剔除投影区外的地形小块,进一步提升了实时优化自适应网格算法绘制地形的速度。     

多仿生机器鱼群体及单体控制体系结构的研究

多仿生机器鱼群体协作与控制的研究,是针对未来仿生机器鱼在水下作业、海洋考察、军事侦察等方面的实际应用而开展的相关理论和关键技术的研究.控制体系结构是其中很重要的一个研究内容,也是今后进一步开展研究工作的基础.考虑到机器鱼自主性和协作性的要求,本文给出了多仿生机器鱼群体和单体控制体系结构,并重点讨论了单体控制体系结构.该体系结构是混合分层的,具有较好的开放性,便于功能的扩展.     

Excel在统计整理中的应用——如何利用图表向导绘制直方图、折线图

统计图是表现统计资料的非常直观有效的手段,在EXCEL中可以利用"图表向导"和"直方图"数据分析工具绘制出来。     

基于SVM分类器的集装箱箱号识别法

为准确、高效地识别集装箱箱号,提出基于支持向量机(Support Vector Machine,SVM)分类器的集装箱箱号识别法.在对大量箱号图片进行实验并统计各种特征识别率的基础上,经过预处理、箱号定位、字符分割,得到36×22像素大小的二值化图像;提取箱号字符的边界和质心特征、改进的灰度直方图特征以及边缘方向直方图...     

基于直方图信息滤波的普通话测试系统评分机制算法

针对受受不同程度干扰噪声污染的功率值语音滤波问题,提出一种依据噪声污染情况自适应选取不同策略滤波的算法.该算法在滤波时无需设定参数,自适应能力强,在滤除噪声并保护语音细节方面比其他算法有较大提高,并且在严重噪声污染的情况下,其对语音的恢复也有较好效果.     

一种基于Radon变换的水平运动模糊图像复原方法

运动模糊图像复原是模糊图像复原领域中的重要课题,本文提出了一种基于Radon变换的水平运动模糊图像复原方法。首先通过对水平模糊图像的Radon变换频谱图进行投影变换而得到图像模糊的长度,从而获取PSF;然后利用维纳滤波与直方图均衡化相结合的方法对模糊图像进行复原。实验证明,此方法能够达到较好的复原效果,是可行和有效的。     

Hamlet and His Revenge

The article introduces Shakespeare's tragedy "Hamlet".Hamlet wants to revenge for his father.But when the opportunity is coming,he delays his revenge.The passage analyzes the causes of his delay from Hamlet's characters.     

Cross Culture Communication——in Our Daily Life

Since the late 1960s,culture has been considered tighter with communication.Culture IS based on the community of communication.Communication involves people and their environment.Thus culture is an important factor in communication.Today with modem economic and technological development,intercultural communication is mole important than ever before. When people from different cultural background communicate with each other,their social stereotype pattern of behavior, their habits of language and thought differ from one another,because these are the possible factors that affect intercultural communications.Culture norms also change,culture may be transferred as signs but we have to study and understand the above carefially.     

A New Woman Image--Analysis of Jane Eyre''''s Character

The thesis mainly discusses the character of the heroine in Charlotte Brontes famous novel "Jane Eyre". There are three major parts-introduction,analysis which is the main body of the thesis,and conclusion.Jane Eyre,the heroine,is a new woman image who requires independence equality and freedom.The thesis just analyzes Janes these rebellious characters through four peroods of her experiences.First,in her childhood,she has shown her rebellious spirit.As an orphan,Jane suffers a lot of misery.Not only her aunt treats her cruelly,her cousins despise her,but also do servants have a prejudice against her.In Janes immature heart, she is unwilling to bear ill treatment.She rebels them bravely.Second,when she studies at Lowood,her rebellious spirit is exposed furtherly.Her view doest stay in Mrs Reeds,instead turns to the whole society.She makes hypocrisy of so-called charity to be discovered completely.At the same time,she declares her independent,equal rebellious thought to her friend-Helldn who endures oppression willingly.Third,she,as a governess in Thornfield Hall falls in love with Rochester-her master.During this period,her thought grows into maturity.Thought she loves him passionately,she never loses her dignity and independence for him.When she knows his mad wife still lives,she makes up her mind to leave him.For she doesnt want to become his mistress.Fourth,her refusal of St Johns proposal of marriage depicts Janes character.She knows John does not love her at all and his purpose of marriage is only to perform his great task missionary.Jane does want to become a sacrifice.She breaks traditional morality,then she goes back to Rochester.     

Using Context Clue in Reading

The context of a word consists of the other words surrounding it and the situation in which it is used.When we come across a new word in our reading,instead of looking it up in a dictionary for its definition,we can guess its meaning from its context.     

Cultural Factors in Reading

Introduction Whatisculture?Toputitsimply,culturemeansthe totalwayoflifeofaperson.Thissimpledefinitionimplies thatculturereferstothepattersofcustoms,traditions,socialhabits,values,beliefsandlanguageofasociety.As cultureissoinclusive,itincludesvirtuallyeverythingthat agroupofpeoplethink,say,doandmake.Followingthedefinitionofsociologists,theterm culturereferstothetotalpatternofbeliefs,customs,institutions,objects,andcharacterizesthelifeofhuman community.“Cultureconsistsofallthesharedproductsof …