三维激光扫描系统中的图像轮廓提取

图像边缘是图像基本特征之一。图像边缘检测在实际中有很多重要的应用。传统的图像边缘检测算子有Roberts、Sobel、Prewitt、Krisch、Laplace算子等,但以上算子在边缘检测时的效果不够清晰,边缘定位不准确。在此基础上重点改进原有的Laplace算子,采用7×7模板,进一步提高图像轮廓的精度和准确度。     

基于灰色系统理论的绝对关联度图像边缘检测方法研究

边缘检测主要是对图像的灰度变化进行度量、检测.解决图像边缘的有无、真假、定向和定位.基于边缘检测的灰色系统理论中的绝对关联度方法对处理非典型规律的图像数据与其它一些方法相比,具有明显的优势.根据绝对关联度分析方法,将仿射变换和最小二乘法原理与绝对关联度模型相结合的边缘检测方法在克服绝对关联度分析方法的规范性和序数效应问题上有一定效果.     

基于TMS320DM642的活动图像边缘检测实现

基于TMS320DM642,采用Sobel边缘检测算法,对活动图像内的物体边缘加以检测.结果表明,该方法可快速、准确地对活动图像中任意一帧内物体的边缘进行检测.     

基于多尺度数学形态学梯度的图像检测

传统边缘检测算子如Canny、Sobel等是通过计算图像中局部小区域的差分来工作的,对噪声比较敏感,在检测边缘的同时常会加强噪声,形态边缘检测器在检测边缘的时候不会加强或放大噪声,单尺度形态学梯度算子结构元素过大或过小都不能检测到满意的结果.将多尺度形态学边缘检测和形态学滤波结合起来,提出一种边缘检测方法.首先利用形态学对多尺度的形态学梯度算子进行边缘检测,再进行填充内部缝隙,接着进行形态学边界平滑,最后通过分割掩模到原图像的结果.仿真结果表明,所提算法能够非常清晰地检测到目标图像的边缘,提取的图像边缘定位准确且平滑,同时具有较强的抗噪能力.     

自适应Canny算法在钢板缺陷边缘检测中的应用

为了更为准确地提取钢板表面缺陷,针对传统 Canny 算法的不足,提出一种改进型Canny边缘检测算法。该算法在平滑滤波部分采用自适应高斯滤波器,在滤除图像噪声的同时,可以保留更多图像边缘信息;采用8×8邻域代替Canny算法中2×2邻域计算梯度幅值;高低阈值的确定是根据图像的灰度均值和方差均值自动计算的。仿真结果表明,改进算法在钢板缺陷的边缘检测中可以准确地得到更多边缘细节,同时也能很好地抑制假边缘,且具有较强的自适应能力。     

基于改进的数学形态学边缘检测算法研究

研究了彩色图像边缘检测问题。针对传统边缘检测算法存在的边缘分辨率较低、低强度边缘保护能力较差等情况,提出了基于数学形态学彩色图像边缘检测改进算法。该方法将利用数学形态四运算,即膨胀、腐蚀、开、闭等变换以及它们的组合,并根据不同的结构元素的尺度大小和结构元类型,给出了一种改进的形态学抗噪型边缘检测算子,有效地检测出完整的图像边缘信息,并保持图像边缘的平滑性。实验结果证明了,与传统的边缘检测算法相比,本文提出的算法能有效提取准确的边缘信息,而且又具有很强的抗噪性,是一种有效的边缘检测方法。     

图像分割算法在零件图像测量中的应用研究

通过分析图像测量系统的组成,说明了图像分割算法在零件图像测量中的重要地位,综合阐述了目前常用的图像分割算法的特点。针对零件图像测量的实际应用情况,提出了一种新的图像分割算法,实现了对目标边缘的准确检测。在此基础上设计了边缘检测的亚像素细分算法,对目标边缘进行亚像素精确定位,并用实例说明了本算法的可行性。     

家具图像中边缘检测算子应用及比较

边缘检测是图像处理中的一项关键技术。由于家具图像的复杂性及现有边缘检测算子的局限性,使得单一的边缘检测器不能检测出家具图像的所有边缘。为了寻找适合家具图像的边缘检测算子,将几种不同的边缘检测算子应用到家具图像中,按照各种测量指标对不同边缘检测算子的检测效果进行了评价。     

小波包变换在图像边缘检测中的应用

简要介绍小波包变换的基本原理,给出基于小波包变换的图像边缘检测方法.用MATLAB仿真实验结果表明该算法对图像噪声干扰有较强的抑制能力,提取的边缘定位准确.     

基于自动位置补偿的缺陷检测图像处理技术

提出一种具有自动位置补偿功能的缺陷检测技术,有效地提取图像的缺陷信息.通过CCD实时准确地采集图像,利用特征提取与边缘检测对图像进行操作,运用多种图像处理技术,结合PLC自动控制,对缺陷信息进行自动检测,从而实现边缘检测与自动位置补偿的有机结合,在环形区域的缺陷检测上得到很好的应用.     

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?     

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.     

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…     

库克斯顿城堡

城堡, 是欧洲典型的建筑之一, 每个城堡都有一个美丽的传说或是一段历史。从本期开始, 我们将推出“城堡之旅”, 带各位读者去浏览、观赏欧洲各地的城堡, 开始一段文化与历史的旅途!     

The Reader Response Approach to Teaching of English Literature

During interview with English majors, it was found that a majority of students expressed disappointment with their experience of English literature classes. Students' dislike of learning English literature appears to be the major problem of teaching English literature in China. Reader response approach is a good way to solve this problem. In this paper, I explain the rationale behind the reader response approach, such as its origin, definition, features, assumptions, and strategies. Then I illustrate how reader response approach works as a teaching strategy by presenting several teaching models. At last I evaluate its usefuiness for teachers and present the advantages of reader response approach in Chinese context.