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Dissertations / Theses on the topic 'MULTIWAVELET'

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1

Koch, Karsten. "Interpolating scaling vectors and multiwavelets in Rd : a multiwavelet cookery book /." Berlin : Logos-Verl, 2007. http://deposit.d-nb.de/cgi-bin/dokserv?id=2917176&prov=M&dok_var=1&dok_ext=htm.

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2

Koch, Karsten. "Interpolating scaling vectors and multiwavelets in Rd a multiwavelet cookery book." Berlin Logos-Verl, 2006. http://deposit.d-nb.de/cgi-bin/dokserv?id=2917176&prov=M&dok_var=1&dok_ext=htm.

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3

Brodin, Andreas. "Multiwavelet analysis on fractals." Doctoral thesis, Umeå : Dept. of Mathematics and Mathematical Statistics, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-1131.

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4

Martin, Michael B. "Applications of Multiwavelets to Image Compression." Thesis, Virginia Tech, 1999. http://hdl.handle.net/10919/33601.

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Methods for digital image compression have been the subject of much study over the past decade. Advances in wavelet transforms and quantization methods have produced algorithms capable of surpassing the existing image compression standards like the Joint Photographic Experts Group (JPEG) algorithm. For best performance in image compression, wavelet transforms require filters that combine a number of desirable properties, such as orthogonality and symmetry. However, the design possibilities for wavelets are limited because they cannot simultaneously possess all of these desirable propertie
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5

Garcia, Bautista Javier. "Multiwavelet-based hp-adaptation for discontinuous Galerkin methods." Thesis, Ecole centrale de Nantes, 2022. http://www.theses.fr/2022ECDN0046.

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L’objectif principal de cette thèse est de développer une méthode hp-adaptative efficace en termes de coût et précision pour les schémas Galerkin discontinus appliqués aux équations de Navier-Stokes, en combinant flexibilité de l’adaptation a posteriori et précision de l’adaptation multi-résolution. Les performances de l’algorithme d’adaptation hp sont illustrées sur plusieurs cas d’écoulements stationnaires en une et deux dimensions. La première direction de recherche emploie une nouvelle méthodologie basée sur les multiondelettes pour estimer l’erreur de discrétisation de la solution numériq
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Fann, George I.-Pan. "Efficient multiwavelet representation of the projector on divergence-free functions." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/9176.

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7

Castrillón, Candás Julio E. (Julio Enrique). "Spatially adaptive multiwavelet representations on unstructured grids with applications to multidimensional computational modeling." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/8923.

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Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2001.<br>Includes bibliographical references (p. 130-134).<br>In this thesis, we develop wavelet surface wavelet representations for complex surfaces, with the goal of demonstrating their potential for 3D scientific and engineering computing applications. Surface wavelets were originally developed for representing geometric objects in a multiresolution format in computer graphics. However, we further extend the construction of surface wavelets and prove the existence of a large class of
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8

Jacobs, Denise Anne. "Multiwavelets in higher dimensions." Diss., Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/28780.

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9

Strela, Vasily. "Multiwavelets--theory and applications." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/10631.

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10

Iyer, Lakshmi Ramachandran. "Image Compression Using Balanced Multiwavelets." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/33748.

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The success of any transform coding technique depends on how well the basis functions represent the signal features. The discrete wavelet transform (DWT) performs a multiresolution analysis of a signal; this enables an efficient representation of smooth and detailed signal regions. Furthermore, computationally efficient algorithms exist for computing the DWT. For these reasons, recent image compression standards such as JPEG2000 use the wavelet transform. It is well known that orthogonality and symmetry are desirable transform properties in image compression applications. It is also known tha
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11

Zheng, Ellen Yanqing. "A comparative study of wavelets and multiwavelets." Thesis, University of Ottawa (Canada), 1996. http://hdl.handle.net/10393/9651.

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In this thesis, some basic concepts and theorems are studied, leading to the cascade algorithm which is the most usual approximating method used in the construction of wavelets. By considering the symmetry property of scalar wavelets, Lawton's complex-valued scalar wavelets are studied and some recent results are implemented in the theory of complex-valued scalar wavelets. Another important part of this thesis is the study of multiwavelets. Some comparisons are made among real-valued scalar wavelets, complex-valued scalar wavelets and real-valued multiwavelets. A special contribution is the fi
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12

Downie, Timothy Ross. "Wavlet methods in statistics." Thesis, University of Bristol, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389339.

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13

Nixon, Steven Paul. "Theory and applications of the multiwavelets for compression of boundary integral operators." Thesis, University of Salford, 2004. http://usir.salford.ac.uk/2035/.

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In general the numerical solution of boundary integral equations leads to full coefficient matrices. The discrete system can be solved in O(N2) operations by iterative solvers of the Conjugate Gradient type. Therefore, we are interested in fast methods such as fast multipole and wavelets, that reduce the computational cost to O(N lnp N). In this thesis we are concerned with wavelet methods. They have proved to be very efficient and effective basis functions due to the fact that the coefficients of a wavelet expansion decay rapidly for a large class of functions. Due to the multiresolution prop
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14

Beegan, Andrew Peter. "Wavelet-based Image Compression Using Human Visual System Models." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/32939.

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Recent research in transform-based image compression has focused on the wavelet transform due to its superior performance over other transforms. Performance is often measured solely in terms of peak signal-to-noise ratio (PSNR) and compression algorithms are optimized for this quantitative metric. The performance in terms of subjective quality is typically not evaluated. Moreover, the sensitivities of the human visual system (HVS) are often not incorporated into compression schemes. This paper develops new wavelet models of the HVS and illustrates their performance for various scalar wav
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15

Schiavazzi, Daniele. "Redundant Multiresolution Uncertainty Propagation." Doctoral thesis, Università degli studi di Padova, 2013. http://hdl.handle.net/11577/3422585.

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Stochastic partial differential equations can be efficiently solved using collocation approaches combined with polynomial expansion in parameter space. Estimators based on these concepts show smaller variance than traditional or stratified Monte Carlo approaches under mild dimensionality. Research efforts in this context are focused on improving the efficiency of these methodologies for high dimensional problems (increasing number of input random variables) or for problems with discontinuous response in parameter space. In the present work, we use Compressive Sampling in order to minimize the
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16

Koch, Karsten [Verfasser]. "Interpolating scaling vectors and multiwavelets in Rd : a multiwavelet cookery book / Karsten Koch." 2007. http://d-nb.info/999923781/34.

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17

Chen, Chien-Liang, and 陳建良. "Acoustic Echo Cancellation Using Multiwavelet Transform." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/98473635267269342751.

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碩士<br>國立交通大學<br>電機與控制工程學系<br>86<br>This paper investigates a new technique using discrete multiwavelet transformsin acoustic echo cancellation. Recently, Geronimo, Hardin, and Massopust constructed two symmetric scaling functions, two associated wavelets and corresponding coefficient matricesfrom the theories of fractal interpolation functions and the notion of multiresolution analysis. In this paper, we introduce a binary tree-structured multiwavelet packetcoupled with adaptive filtering
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18

Yao, Kun-Hong, and 姚坤宏. "Multiwavelet-based Image Watermarking Using Coding Scheme." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/29439290793891792815.

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碩士<br>清雲科技大學<br>電機工程所<br>99<br>A wavelet-based watermarking process utilizing improved channel coding techniques is proposed. The image is decomposed by discrete wavelet transform (DWT) and the watermarks are embedded in sub-blocks of the third level by adjusting the coefficients. After data permutation, the watermark tenacity is enhanced by the fault tolerance ability of the convolutional coding schemes. An improved coding structure is presented to obtain double watermark information without increasing the embedded data. Robustness of the watermark can then be increased. The normalized corre
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19

SINDHU, PRINCY. "MRI/PET IMAGE FUSION USING MULTIWAVELET TRANSFORM." Thesis, 2016. http://dspace.dtu.ac.in:8080/jspui/handle/repository/14790.

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Image fusion is the technique of blending multiple images to obtain a fused image with more descriptive and reliable information. The keen motivation behind image fusion is to compound the complementary as well as relevant information of several images captured from a common scene, to generate an image comprising the superior features of source images. With the availability of modern instrumentation (medical imaging tools) and developed technologies, medical image fusion has become a vital tool in medical applications. Medical image fusion is a concept dealing with the idea of improving the im
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20

Chang, Yu-Ping, and 張郁屏. "Learning-based Finger-Vein Verification with Multiwavelet Technologies." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/fxkz8n.

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碩士<br>國立清華大學<br>通訊工程研究所<br>106<br>In recent years, the issue of biometrics has attracted attention. Different biometrics have different applications in life. Because finger vein recognition is non-contact in vivo recognition, the possibility of counterfeiting is low, and it is very convenient to use and has high stability. More and more people are interested in finger vein identification, and there are more and more topics related to vein identification. At present, many banks continue to propose vein identification on a continuous basis, which makes deposits and withdrawals more convenient an
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21

Cho, Okkyung. "Construction of compactly supported multiwavelets." 2006. http://purl.galileo.usg.edu/uga%5Fetd/cho%5Fokkyung%5F200608%5Fphd.

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22

Chen, Yueting. "Handwritten numeral recognition using multiwavelets." Thesis, 2002. http://spectrum.library.concordia.ca/1812/1/MQ72929.pdf.

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In this report, we review different techniques for handwritten numeral recognition. More importantly we develop and test a hand-written numeral recognition system using multiwavelets. Given a black-and-white numeral, we first trace the contour of the numeral. Secondly we normalize and resample the contour points. Thirdly we perform multiwavelet orthonormal shell expansion on the contour points and we get several resolution levels and the average. We use the multiwavelet coefficients as the features to recognize the hand-written numerals. We use the L1 distance as a measure and the nearest neig
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23

Zhuang, Xiaosheng. "Interpolating refinable function vectors and matrix extension with symmetry." Phd thesis, 2010. http://hdl.handle.net/10048/1224.

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Thesis (Ph. D.)--University of Alberta, 2010.<br>Title from pdf file main screen (viewed on July 30, 2010). A thesis submitted to the Faculty of Graduate Studies and Research in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Applied Mathematics, Department of Mathematical and Statistical Sciences, University of Alberta. Includes bibliographical references.
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