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Description: Stockwell 的S 变换C代码,特性优于FFT和小波变换-Stockwell S-transform C code, characteristics superior to FFT and Wavelet Transform
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Size: 2048 |
Author: geotiger |
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Description: book for HHT
Hilbert—Huang Transform
and Its Applications
Editors
Norden E Huang
NASA Goddard Space Flight Center, USA
Samuel S P Shen
University of Alberta, Canada
\[p World Scientific
Published by
World Scientific Publishing Co. Pte. Ltd.
5 Toh Tuck Link, Singapore 596224
USA office: 27 Warren Street, Suite 401-402, Hackensack, NJ 07601
UK office: 57 Shelton Street, Covent Garden, London WC2H 9HE
Library of Congress Cataloging-in-Publication Data
The Hilbert-Huang transform and its applications / editors, Norden E. Huang, Samuel S.P. Shen.
p. cm. — (Interdisciplinary mathematical sciences v. 5)
Includes bibliographical references and index.
ISBN 981-256-376-8 (alk. paper)
-book for HHT
Hilbert—Huang Transform
and Its Applications
Editors
Norden E Huang
NASA Goddard Space Flight Center, USA
Samuel S P Shen
University of Alberta, Canada
\[p World Scientific
Published by
World Scientific Publishing Co. Pte. Ltd.
5 Toh Tuck Link, Singapore 596224
USA office: 27 Warren Street, Suite 401-402, Hackensack, NJ 07601
UK office: 57 Shelton Street, Covent Garden, London WC2H 9HE
Library of Congress Cataloging-in-Publication Data
The Hilbert-Huang transform and its applications/editors, Norden E. Huang, Samuel S.P. Shen.
p. cm. — (Interdisciplinary mathematical sciences v. 5)
Includes bibliographical references and index.
ISBN 981-256-376-8 (alk. paper)
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Size: 6172672 |
Author: motway |
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Description: 为提高基于内容的图像检索系统中纹理特征提取的有效性,提出了又一种纹理图像检索方法。该方法
利用非下采样 Contourlet变换对图像进行分解, 提取不同子带和不同方向变换系数矩阵的均值和方差为特征向量, 作
为数据库中纹理图像的索引,并利用两种不同的相似度函数计算图像之间的相似度,建立了一套基于示例查询图像
的纹理图像检索系统。实验结果表明,与小波包等特征提取方法相比, 该方法不仅能降低特征向量维数,而且能取得
更高的检索准确率和检索速度。-To i ncrease t he vali d ity o f tex t ure feature ex tracti on in conten t-based i mage retrieva l syste m, a nove l approach
for tex ture i m age retr ieva lw as proposed . Th i s approach w as based on theNonSubsamp l ed Con t our l et T ransform ( NSCT). The
m eans and variab l es of NSCT co efficien tsm a trix i n d ifferen t s ubbands and var i ous directi ons were ex tracted to for m the feature
vectors wh ich we re reg arded as i ndexes of tex t ure i mages i n i m age da tabase . Two s i m il ar ity functi ons were used to compute the
si m ilar i ty bet w een i m ages . A tex ture re trieval sy stem based on query i m age w as deve l oped . Co m pared to the w ave let packag e
transform, th i s approach can no t on l y reduce the di m ension o f feature vectors , but a l so get higher accu racy and speed of
retr i eva. l
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Size: 346112 |
Author: jjdjjf |
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Description: 小波变换在数字图像处理中的应用是小波变换典型的应用之一。由信号分析中傅里叶变换的不足引出小波变换, 然后简单介绍了小波变换的定义和种类, 分析了小波变换的性质和Mallat 算法, 总结了小波变换在数字图像处理中的四种应用:基于小波变换的图像压缩、图像去噪、图像增强和图像融合, 分析了四种应用的过程及特点, 同时进行了相应的Matlab试验与仿真。试验结果表明, 小波变换在数字图像处理中的应用切实可行、简单方便、效果好、有很强的实用价值, 有较好的应用前景。-The applicatio n of wave let transform in digital imag e processing is one o f the ty pical applications of wavelet transform .The w avelet transform is introduced fo r the lack o f Fourier tr ansfo rm in the sig nal analysis , the definitio n and types of the wavelet transform ar e pro po sed briefly , and its proper ties and Mallat alg orithm a re analy zed .Fo ur kinds o f applicationsof wavelet transfo rm in dig ita l image pro ce ssing ar e summarized(imag e compr essio n, image denoising , image enhancement and image fusion based o n w avele t tr ansfo rm), the processe s and char acte ristics of this fo ur kinds of applicatio ns are analyzed,meanw hile the co r respo nding Ma tlab ex pe riment and simulatio n ar e made .Ex perimental results show that it is practical, simple , convenient a nd effective , and has a stro ng practical value and a g oo d applicatio n pro spects for the wavele t transform in digital image pro cessing .
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Size: 506880 |
Author: kiel |
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