首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 78 毫秒
1.
提出了一种新的基于小波变换的拉普拉斯图像边缘检测方法:采用二次采样小波变换方法生成图像的梯度图像,然后采用普通拉普拉斯算子提取出图像的边缘.实验结果表明该方法既能够有效地抑制噪声,又能够清晰地提取到图像的真实边缘.有利于完善拉普拉斯边缘检测算子.  相似文献   

2.
图像边缘检测技术是图像分割、目标识别、区域形状提取等图像分析领域中十分重要的基础。对具有代表性的图像边缘检测算子进行了讨论,还结合小波变换方法和数学形态学方法分析了在边缘检测中的应用,并给出了这些算法的仿真实验效果,最后对实验结果进行了分析。这有助于学习和寻找更好的边缘检测方法。  相似文献   

3.
田苗苗 《邢台学院学报》2009,24(4):108-108,111
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.  相似文献   

4.
针对水泥路面裂缝识别的干扰和噪声问题,提出一种基于图像增强的裂缝检测方法。首先利用小波变换增强裂缝对比度;再采用空域滤波和基于傅里叶变换(FFT)的频域滤波相结合的方法滤除图像中的噪声和干扰;在此基础上,使用边缘检测方法实现裂缝提取。实验结果表明,该方法可有效去除图像中的干扰和噪声,较好地识别水泥路面的裂缝。  相似文献   

5.
利用CCD传感器成像系统摄取零件配合间隙图片,通过图像转换、直方图均衡化、winner滤波去噪、边缘提取等图像处理方法清晰的提取出配合间隙的边缘图像,利用hough变换检测直线,即可根据检测零件的参数要求算出间隙尺寸.  相似文献   

6.
利尿剂的循环伏安法检测   总被引:1,自引:0,他引:1  
用电化学分析系统对两种利尿剂进行同时检测后,初步发现循环伏安法对兴奋剂检测的可行性.其中双克的线性范围为1 51×10-5~1 52×10-4mol·dm-3,检测限为1 76×10-6mol·dm-3;速尿的线性范围为1 31×10-4~1 08×10-3mol·dm-3,检测限为1 80×10-6mol·dm-3,同时对循环伏安法分析条件和电化学反应机理进行了初步探讨.  相似文献   

7.
基于小波变换和微分算子的图像边缘检测   总被引:1,自引:0,他引:1  
本文提出了一种检测彩色图像边缘的新方法,该方法先把彩色图像分解为红、绿、蓝三基色图像,然后利用小波变换对三基色图像分别进行多尺度的分解,提取其低频系数,用微分算子检测其图像边缘,最后利用多通道信息融合的办法将三基色的图像边缘融合在一起。通过一个实验说明了该方法的有效性。  相似文献   

8.
提出了一种新的图像边缘检测算法,该算法融合了非下采样轮廓波变换与数学形态学方法来实现图像的边缘检测.首先,源图像被非下采样轮廓波变换分解成多尺度、多方向子带;然后,分别采用双阈值模极大值算法和数学形态学方法提取高频与低频子带的边缘信息;最后,综合高频、低频子带边缘信息,得到源图像全部的边缘信息,并进行细化,剔除孤立点,获得源图像的边缘.仿真实验结果表明:新算法能够有效抑制噪声,去除伪边缘,一定程度上克服了光照不均引起的不良影响;与传统经典算法LoG,Sobel和Canny及模极大值方法相比,该算法能保持足够的定位精度和边缘细节,且边缘轮廓的完整性、光滑度、清晰度等得到明显提升.  相似文献   

9.
夏丽 《时代教育》2012,(21):29+39+4
为了解决传统的人工定义阈值和检测算子在边缘检测方面的不足,提出了基于迭代最佳阈值分割的边缘检测,并据此进行图像的边缘提取。这种方法不仅大大降低了算法的复杂度,提供最佳阈值,同时也能保证边缘提取的精确度,消除图像噪声对边缘提取的影响。通过对迭代阈值的应用,利用边缘检测算子对图像进行边缘检测,并和现有的方法进行对比。实验结果表明,和现有的检测方法比较,该方法在检测效率和准确度上表现比较优秀。  相似文献   

10.
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。  相似文献   

11.
汉字倒说     
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。  相似文献   

12.
钱生钱!     
我们绝大部分人都同意一件事情——我们喜欢金钱。但是你对金钱的喜欢之情足够到让你创立一份事业么?.财富通常被人忽视,主要在于人们不能真正了  相似文献   

13.
The problem on the geometrc inequalities involving an n-dimensional simplex and its inscribed simplex is studied. Aninequality is established, which reveals that the difference between the squared circumradius of the n-dimensional simplex andthe squared distance between its circumcenter and barycenter times the squared circumradius of its inscribed simplex is not lessthan the 2(n-1)th power of n times its squared inradius, and is equal to when the simplex is regular and its inscribed siplex is atangent point one. Deduction from this inequality reaches a generalization of n-dimensional Euler inequality indicating that thecircumradius of the simplex is not less than the n-fold inradius. Another inequality is derived to present the relationship betweenthe circumradius of the n-dimensional simplex and the circumradius and inradius of its pedal simplex.  相似文献   

14.
现在,我们可以没有面包,没有钱,没有房子,没有车子……但我们唯独不能丢失的是高尚的情操,笃定的信念,还有,满满的希望!  相似文献   

15.
Using virtual reality for interactive design gives a designer an intuitive vision of a design and allows the designer to achieve a viable, optimal solution in a timely manner. The article discusses the process of making the Virtual Reality System of the Humble Administrator's Garden. Translating building data to the Virtual Reality Modeling Language (VRML) is by far unsatisfactory. This creates a challenge for computer designers to do optimization to meet requirements. Five different approaches to optimize models have been presented in this paper. The other methods are to optimize VRML and to reduce the file size. This is done by keeping polygon counts to a minimum and by applying such techniques as object culling and level-ofdetail switching.  相似文献   

16.
钱微 《华章》2007,(3):124-124
The awareness of individualism can be traced back to the period of American Revolution when the Declaration of Independence was produced.It expressed basic beliefs concerning freedom,equality,democracy,privacy and the relationship between people and government,which were exactly what the philosophy of individualism mostly dealt with at that time.This paper is to exploit the essence of individualism by analyzing the Declaration .The analysis enables us to reconsider its significance to the issue of America human rights and foreign policies.  相似文献   

17.
Public speaking, as one kind of speech act, the speaker uses some pragmatic strategies, for example,the use of personal pronoun, in order to achieve effective communication. Speakers use the first personal pro-noun we and the second personal pronoun you conventionally, also there are some deviations in the use of person-al pronouns. However, theses kinds of uses have to be explained and understood in such a specific context.  相似文献   

18.
This essay mainly studies the linguistic features of News English on stylistics.The study is made mainly on three aspects of News English.They are lexical features.sentence features and grammar features of News English.Through the study we find that News English,as a distinctive and new language.has its own lin-guistic features in words, sentences and grammar.  相似文献   

19.
《东南大学学报》2014,(3):F0003-F0003
正Journal of Southeast University(English Edition)[JSEU(EE)],a comprehensive academic journal sponsored by Southeast University,was established in1984 and is published quarterly.It is included in Ei Compendex,CA.CSA and MR in America.Scopus in  相似文献   

20.
《东南大学学报》2014,(2):F0003-F0003
正Journal of Southeast University(English Edition)[JSEU(EE)],a comprehensive academic journal sponsored by Southeast University,was established in1984 and is published quarterly.It is included in Ei Compendex,CA,CSA and MR in America,Scopus in the Netherlands,INSPEC in UK?ZB1 MATH in Germany?AJ in Russia,and other databases.This journal publishes up-to-date theoretical and experimental papers of high creativity and great  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号