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Now showing items 31-40 of 49
Long-Range Dependence: Now you see it now you don't!
(2002-11-20)
Over the last few years, the network community has started to rely heavily on the use of novel concepts such as self-similarity and Long-Range Dependence (LRD). Despite their wide use, there is still much confusion regarding ...
3D Geometry Coding using Mixture Models and the Estimation Quantization Algorithm
(2002-09-01)
3D surfaces are used in applications such as animations, 3D object modeling and visualization. The geometries of such surfaces are often approximated using polygonal meshes. This thesis aims to compress 3D geometry meshes ...
Platelets for Multiscale Analysis in Medical Imaging
(2002-04-20)
This paper describes the development and use of multiscale, platelet-based image reconstruction algorithms in medical imaging. Such algorithms are effective because platelets approximate images in certain (piecewise) ...
Edge Characteristics in Wavelet-Based Image Coding
(2001-04-20)
Accurate prediction of wavelet coefficients relies on an understanding of the phase effects of edge alignment. This research examines techniques for uncovering edge information based on the available coefficients. These ...
A Statistical Multiscale Framework for Poisson Inverse Problems
(2000-08-20)
This paper describes a statistical modeling and analysis method for linear inverse problems involving Poisson data based on a novel multiscale framework. The framework itself is founded upon a multiscale analysis associated ...
Image Restoration Using the EM Algorithm and Wavelet-Based Complexity Regularization
(2002-05-20)
This paper introduces an <i>expectation-maximization</i> (EM) algorithm for image restoration (deconvolution) based on a penalized likelihood formulated in the wavelet domain. Regularization is achieved by promoting a ...
Multiscale Edge Grammars for Complex Wavelet Transforms
(2001-10-01)
Wavelet domain algorithms have risen to the forefront of image processing. The power of these algorithms is derived from the fact that the wavelet transform restructures the image in a way that makes statistical modeling ...
Model-based Inverse Halftoning with Wavelet-Vaguelette Deconvolution
(2000-09-01)
In this paper, we demonstrate based on the linear model of Kite that inverse halftoning is equivalent to the well-studied problem of deconvolution in the presence of colored noise. We propose the use of the simple and ...
Image Compression using an Efficient Edge Cartoon + Texture Model
(IEEE Computer Society, 2002-04-01)
Wavelet-based image coders optimally represent smooth regions and isolated point singularities. However, wavelet coders are less adept at representing perceptually important edge singularities, and coding performance ...
ForWaRD: Fourier-Wavelet Regularized Deconvolution for Ill-Conditioned Systems
(2004-02-01)
We propose an efficient, hybrid <i>Fourier-Wavelet Regularized Deconvolution</i> (ForWaRD) algorithm that performs noise regularization via scalar shrinkage in both the Fourier and wavelet domains. The Fourier shrinkage ...