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IEEE transactions on medical imaging, ISSN 1558-254X, 09/2011, Volume 30, Issue 9, pp. 1649 - 1660
In this work, we exploit the fact that wavelets can represent magnetic resonance images well, with relatively few coefficients. We use this property to improve... 
Algorithm design and analysis | iterative shrinkage/thresholding algorithm (ISTA) | Minimization | sparsity | Discrete wavelet transforms | Image reconstruction | fast weighted iterative shrinkage/thresholding algorithm (FWISTA) | Convergence | magnetic resonance imaging (MRI) | non-Cartesian | Magnetic resonance imaging | wavelets | fast iterative shrinkage/thresholding algorithm (FISTA) | thresholded Landweber | total variation | undersampled spiral | Compressed sensing | nonlinear reconstruction | Engineering | Computer Science, Interdisciplinary Applications | Life Sciences & Biomedicine | Technology | Engineering, Biomedical | Radiology, Nuclear Medicine & Medical Imaging | Computer Science | Engineering, Electrical & Electronic | Imaging Science & Photographic Technology | Science & Technology | Reproducibility of Results | Algorithms | Magnetic Resonance Spectroscopy - methods | Brain - anatomy & histology | Humans | Image Interpretation, Computer-Assisted - methods | Sensitivity and Specificity | Magnetic Resonance Imaging - methods | Image Enhancement - methods | Image Processing, Computer-Assisted - methods | Nonlinear Dynamics | Phantoms, Imaging | Wavelet transforms | Usage | Innovations | Fourier transformations | Mathematical optimization | Methods | Studies | Reconstruction | Mathematical analysis | Magnetic resonance | Images | Trajectories | Optimization | Index Medicus | Medical Imaging | Engineering Sciences | Signal and Image processing
Journal Article
IEEE transaction on neural networks and learning systems, ISSN 2162-237X, 2012, Volume 23, Issue 7, pp. 1013 - 1027
The special importance of L1/2 regularization has been recognized in recent studies on sparse modeling (particularly on compressed sensing). The L1/2... 
Compressive sensing | half | regularization | sparsity | hard | thresholding representation theory | soft | thresholding algorithms
Journal Article
Proceedings of SPIE - The International Society for Optical Engineering, ISSN 0277-786X, 2008, Volume 6815
Conference Proceeding
Journal of econometrics, ISSN 0304-4076, 10/2008, Volume 146, Issue 2, pp. 304 - 317
This paper studies two refinements to the method of factor forecasting. First, we consider the method of quadratic principal components that allows the link... 
Diffusion index | Factor models | LARS | Hard thresholding | LASSO | Diffusion index Factor models LASSO LARS Hard thresholding | Studies | Inflation | Housing starts | Time series | Economic forecasting | Estimating techniques
Journal Article
SIAM journal on optimization, ISSN 1095-7189, 01/2010, Volume 20, Issue 4, pp. 1956 - 1982
Journal Article
Pattern recognition letters, ISSN 0167-8655, 10/2006, Volume 27, Issue 14, pp. 1644 - 1649
Automatic thresholding has been widely used in the machine vision industry for automated visual inspection of defects. A commonly used thresholding technique,... 
Automatic thresholding | Defect detection | Computer Science, Artificial Intelligence | Technology | Computer Science | Science & Technology | Machine vision
Journal Article
Signal processing, ISSN 0165-1684, 03/2015, Volume 108, pp. 459 - 475
Compressed sensing using ℓ1 minimization has been widely and successfully applied. To further enhance the sparsity, a non-convex and piecewise linear penalty... 
ℓ1 minimization | Thresholding algorithm | Compressed sensing | Non-convex penalty | minimization
Journal Article
IEEE transaction on neural networks and learning systems, ISSN 2162-2388, 2019, Volume 31, Issue 5, pp. 1 - 12
Journal Article
Linear algebra and its applications, ISSN 0024-3795, 01/2014, Volume 441, pp. 22 - 60
The cosparse analysis model has been introduced recently as an interesting alternative to the standard sparse synthesis approach. A prominent question brought... 
Iterative hard thresholding | Synthesis | CoSaMP | Analysis | Sparse representations | Hard thresholding pursuit | Subspace-pursuit | Compressed sensing | Physical Sciences | Mathematics | Mathematics, Applied | Science & Technology | Algorithms | Mathematics - Functional Analysis | Signal and Image Processing | Functional Analysis | Engineering Sciences | Computer Science
Journal Article
Optical Engineering, ISSN 0091-3286, 03/2004, Volume 43, Issue 2, pp. 282 - 289
Thresholding of video images is a great challenge because of their low spatial resolution and complex background. We investigate the issue of thresholding... 
entropy thresholding | relative entropy thresholding | Otsu's method | color thresholding | RGB color thresholding | Color thresholding | Entropy thresholding | Relative entropy thresholding | Optics | Physical Sciences | Science & Technology
Journal Article
Journal of mathematical analysis and applications, ISSN 0022-247X, 10/2019, Volume 478, Issue 2, pp. 466 - 475
We investigate properties of the m-th error of approximation by polynomials with constant coefficients Dm(x) and with modulus-constant coefficients Dm⁎(x)... 
Almost greedy bases | Greedy bases | Thresholding greedy algorithm | Physical Sciences | Mathematics | Mathematics, Applied | Science & Technology
Journal Article