基于改进Hough与图像比对法的窨井盖疑似破裂检测（英文）

由于不能及时发现城市道路窨井盖的破损和缺失,对市民的生命与财产安全造成极大的伤害,且目前已见报道的诸多研究成果均存在实施难度的问题,基于城市道路现有的道路视频图像,提出了针对复杂路面情况下识别窨井盖破损和缺失的改进Hough变换与图像比对综合算法.在经过预处理的图像上,利用边缘跟踪算法找到所有的边缘轮廓后,利用改进的Hough变换、色彩识别与图像比对算法找到窨井盖区域,同时计算出窨井盖区域变化率,根据变化率是否达到阈值来判别窨井盖是否有疑似破损与缺失情况.该方案有效地提高了传统Hough变换的处理速度,减少了无效采样、累积.实验结果表明,该算法在多种复杂背景、不同视角、不同拍摄时间和条件、目标被部分遮挡等情况下都有很好的定位与缺失预警效果.     

基于改进Hough变换的不规则纸病的检测方法

在常规纸病检测中,Hough变换常用来检测褶子纸病,但经常会忽略图像中细小的曲线或者将其近似为直线。本文运用改进的Hough变换和数学形态学算子结合的分析方法,可以准确地实现图像中曲线或者虚线的纸病检测。应用结果表明,此方法识别率高,计算速度快,效果良好。     

随机Hough变换在高压输电线检测中的应用

将改进的随机Hough变换(RHT)应用于高压输电线图像中的电线检测。对采集到的图片进行图像增强、去噪、边缘检测等预处理操作,根据高压输电线的直线特征和角度特征,采用结合角度判定改进的RHT完成输电线路的检测。实验表明,该算法能有效检测出高压输电线,与传统的Hough变换检测直线相比,该算法能够节约检测时间,提高检测精度,为实时性检测打下了良好基础。     

基于机器视觉的轨道异物侵限检测方法研究

提出了一种快速的轨道异物检测及分割方法.首先是在图像中应用快速、准确的Hough变换检测出铁轨,再以铁轨图像参数确定工作窗口以检测并分割出异物.避免了对整幅图像内不必要的物体进行检测,有效提高了检测速度.通过实验证明该方法的实时性与有效性.     

边缘缺失的畸变图像校正算法研究

目前,尚未有对边缘缺失畸变图像进行校正的有效方法。四边缘确定的畸变图像通过透视变换矫正,先确定边缘缺失图像的 4 个顶点,再通过透视变换实施校正。对边缘缺失的多边缘线图像,使用 Hough 变换的边缘检测及桥接膨胀,使主要边缘线延伸相交成 4 个点的封闭图形以确定四顶点。此外,拍摄图片有时背景复杂,对有效信息所在的四边形区域辨认带来一定困难。因此,在整幅图像中先获取所有连通区域,建立所有连通区域最小外接矩形,计算各外接矩形整幅占比,模糊比较后确定图像所在目标区域。在得出目标区域 4 个顶点后,采用透视变换进行畸变校正,再进行有效信息提取识别。在 Matlab 实验中,识别矫正成功率达 93%,说明该方法准确率较高,适用于多边缘缺失图像矫正。     

基于GPU的图像增强实验设计与实现

图像增强旨在改善和提高图像的显示质量,通过梯度进行增强是一种十分有效的方法。图形计算单元(GPU)因为其较高并行性和其特殊的结构特性,正被广泛地应用在算法加速和科学计算领域。为了提高学生对图像增强原理的理解,以及使学生掌握利用GPU进行算法实现的原理与过程,设计了基于GPU的图像增强实验。     

结合k-means聚类和Hough变换的原木根数统计方法

为了准确识别原木端面区域,在RGB颜色空间和Lab颜色空间对装载原木车辆的图片进行k-means算法以实现原木端面区域与背景的分离,实验证明:基于Lab颜色空间中a(红/绿)、b(黄/蓝)层信息进行k-means聚类分割,能够正确识别原木端面区域的阴影部分.在原木根数的统计中,Hough变换圆检测方法能够较好地解决原木轮廓偏离圆形及边缘相交的问题.K-means聚类结合Hough变换可实现原木根数的统计,能提高人工统计根数的效率.     

畸变图像的目标区域自动提取及校正算法研究

研究畸变图像处理的方法较多,这些方法提高了算法可靠性、完善了算法可行性,但如何提取畸变图像的有用信息进行再校正的理论和方法却不多。为此提出一个新的算法,结合Hough变换和透视变换,在畸变图像中自动选取有用的目标图像区域并提取出来,最后通过透视变换将其进行图像校正与还原。MATLAB仿真实验结果表明,该方法精度高、容错性高、稳定性好,可广泛应用到模式识别等领域。     

量子力学中的傅利叶变换解析

量子力学作为现阶段物理研究的基础学科,其重要性不言而喻.但国内很多教材对傅利叶变换的本质及其具体的物理图像总是三言两语一笔带过,这种情况使得初学者对傅利叶变换的理解只存在于表面,而对其本质的含义似是而非,从而增加了在量子力学以后内容学习的难度,因此,对傅利叶变换的本质讨论和物理图像的分析成为了必需.针对这种情况,本文对傅利叶变换本质含义和物理图像进行了详细的讨论,并以经典的例子为例进行实际论证,总结出了完整易懂的傅利叶变换物理图像.     

基于DCT变换的彩色图像数字水印嵌入算法研究

提出了DCT变换的彩色图像水印技术。在嵌入水印过程中,首先将彩色图像映射为一幅灰度图像,然后通过对灰度图像进行分块的DCT变换并计算各块的方差和均值,同时结合人类视觉系统(HVS)对图像进行分类,最后将水印信息嵌入到图像中。此算法可用于彩色图像的版权保护。     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

Western and Eastern culture differences in commercial field

The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity.     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

风的曲线

Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…