共查询到20条相似文献，搜索用时 46 毫秒
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为解决传统图像拼接检测算法对图像内容、光照变化等鲁棒性不强问题,提出一种基于多种纹理特征融合的图像拼接检测方法。对二维灰度图像执行非下采样轮廓波变换（NSCT）,以获得包含图像纹理特征的一系列子带图像。对在水平和垂直方向进行差分处理的低频子带图像以及4个高频图像,获取韦伯局部描述符（WLD）纹理和局部三值模式（LTP）纹理。将WLD纹理与灰度共生矩阵结合,得到像素点强度、梯度与灰度之间的关系;再将LTP纹理与灰度共生矩阵结合,得到无噪声和光照影响的像素点灰度间关系;最后分别提取WLD值共生矩阵和LTP值共生矩阵的对比度、相关性、相异度、熵、能量等5个特征,并融合成特征向量,使用RBF神经网络分类。该方法在哥伦比亚彩色图像库上检测准确率达到了95.7%。 相似文献
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针对传统多聚焦图像融合方法不能有效度量图像中聚焦区域的问题,提出一种基于高阶奇异值分解的图像融合新方法。高阶奇异值分解可以精确提取图像纹理特征,并对源图像进行分解。充分考虑像素间的区域相关性,提取分解系数的空间频率、平均梯度和区域能量等区域特征,并提出一种新颖的基于区域特征的多活动测度融合策略,该策略可有效度量图像中的聚焦区域。实验结果表明,该融合方法能够更好地保留图像的边缘细节信息。 相似文献
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提出一种基于Mean-shift的灰度图像分割算法.首先提取图像的灰度值、梯度、邻域特性作为Mean-shift的特征向量,然后用Mean-shift算法收敛于概率密度最大点的特点,找到图像的聚类中心,从而实现了分割图像,增加了梯度和邻域特性的Mean-shift算法分割图像更精确的效果. 相似文献
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纹理分析是肝脏B超图像识别的重要方法,本文利用多进制小波变换提取脂肪肝和正常肝脏的纹理特征,结合空域特性对B超肝脏图像进行分类,采用自适应浮动搜索算法进行特征筛选,经实验测试,取得了较好的效果。 相似文献
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传统的第三代相干体算法在遇到地层大倾角时效果较差,结构张量和方向场技术在数据的纹理方向判别上有着广泛应用。地震图像是一种特殊的纹理图像,针对三维地震数据和C3算法,提出基于梯度的结构张量的算法改进,利用局部窗口中各点的梯度值估计地层倾角,对数据进行调向后再进行相干计算。仿真和实际数据表明,该方法得到的相干图像分辨率更高,并能有效地消除地层倾角带来的干扰。 相似文献
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黄皖毅 《广东广播电视大学学报》2010,19(4):106-109
遥感技术为人们提供了大量的图像数据,如何从中提取所需信息,是遥感图像处理技术研究的热点。基于多尺度小波变换,可提取城市图像的纹理特征。根据城市影像中地物特征和小波技术的特点,确定合适的窗口大小,采用逐一滑动窗口的方法,对每一窗口提取相应的小波统计特征;应用小波变换的多尺度特性,在不同尺度上提取出子图像特征,构造出纹理特征矢量,为遥感图像的分类提供纹理特征。 相似文献
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赵秀芝 《浙江工贸职业技术学院学报》2014,(1):36-39
基于L0梯度泛函优化和变换域阈值法的图像去噪算法,首先利用L0梯度泛函的最优化算法把含有噪声的图像分解为显著边缘层和细节纹理细节层,然后对含有噪声的细节纹理层图像进行短时傅利叶转换,并在变换域中利用阈值法分离纹理细节层中的图像细节纹理和噪声,进而去除图像的噪声。实验结果表明图像去噪算法获得了显著的去噪效果。 相似文献
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邱崇丙 《唐山师范学院学报》2014,(1):21-23
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
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《海外英语》2007,(4):36
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. 相似文献
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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. 相似文献
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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. 相似文献
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RUZBEHANI Mohsen 《重庆大学学报(英文版)》2004,3(1):20-25
1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec… 相似文献
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Rachel Zupek 《海外英语》2007,(11):40-41
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
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YANGShiguo 《重庆大学学报(英文版)》2004,3(1):86-88
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
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Rajesh Kanoi 《海外英语》2007,(1):52
Today, Sunday morning, I sit thinking and typing at my computer. My thoughts are in my homeland, India and my body is in China. The body is here and mind there for a good reason. Mr. Hu is president and I am resident and both are in each other's countries (what a difference the absence of one small letter makes!). Mr. Hu will return in a few days and I will stay on longer. 相似文献