James G. Nagy

List of publications and technical reports.

I apologize -- I have not been updating this for a few years. Maybe I'll get back to it some day, but if you're interested in my research activity, see my summary CV. You can also view my Google Scholar page.

An Efficient Computational Approach for Multiframe Blind Deconvolution
submitted to J. Comput. Appl. Math., 2011
Y.-W. Fan and J. Nagy,

Large-Scale Inverse Problems in Imaging
Chapter 2 in Otmar Scherzer (ed.) Handbook of Mathematical Methods in Imaging, Springer (2011), pp. 43-86.
J. Chung, S. Knepper, and J. Nagy,

Structured Linear Algebra Problems in Adaptive Optics Imaging
to appear in Advances in Comp. Math, 2011
J. Bardsley, S. Knepper, and J. Nagy,

Fast PSF reconstruction using the frozen flow hypothesis
Proceedings of the Advanced Maui Optical and Space Surveillance Technologies (AMOS) Conference, September 13-16, 2010.
J. Nagy, S. Jefferies and Q. Chu

Parallel Colt: A High Performance Java Library for Scientific Computing and Image Processing
ACM Transactions on Mathematical Software, 37 (2010), pp.31:1--31:22
P. Wendykier and J. Nagy,

An Efficient Iterative Approach for Large-Scale Separable Nonlinear Inverse Problems
SIAM J. Sci. Comput., 31 (2010), pp. 4654-4674.
J. Chung and J. Nagy,

Synthetic Boundary Conditions for Image Deblurring
Linear Alg. Applic., in press, available online 25 January 2010.
Y. Fan and J. Nagy,

Numerical Algorithms for Polyenergetic Digital Breast Tomosynthesis Reconstruction
SIAM J. Imaging Sci., 3 (2010), pp. 133-152.
J. Chung, J. Nagy, and I. Sechopoulos

Numerical Linear Algebra for Nonlinear Microwave Imaging
Math/CS Technical Report TR-2008-020
Elect. Trans Numer. Anal., 33 (2009), pp. 105-125.
F. Di Benedetto, C. Estatico, J. Nagy, and M. Pastorino

Large-Scale Image Deblurring in Java
Math/CS Technical Report TR-2008-002
Lecture Notes in Compuer Science, Computational Science -- ICCS 2008, volume 5101 (2008), pp. 721--730.
P. Wendykier and J. Nagy

Nonlinear Least Squares and Super Resolution
Math/CS Technical Report TR-2007-023
The Journal of Physics Conference Series, volume 124, P-012019, 2008.
J. Chung and J. Nagy

Accelerating Convergence of Iterative Image Restoration Algorithms
Math/CS Technical Report TR-2007-020
Proceedings of the Advanced Maui Optical and Space Surveillance Technologies (AMOS) Conference, September 12-15, 2007.
J. Nagy

Inpainting Through Fractal Image Encoding
Math/CS Technical Report TR-2007-010-A
Y. Fan and J. Nagy

Variational Deconvolution of Multi-Channel Images with Inequality Constraints
Math/CS Technical Report TR-2007-007-A
Proceedings of the 3rd Iberian Conference on Pattern Recognition and Image Analysis, IbPRIA, June 6-8, 2007, Girona, Spain, Lecture Notes in Computer Science, Springer, Berlin, 2007.
M. Welk and J. Nagy

The Anti-Reflective Transform and Regularization by Filtering
Math/CS Technical Report TR-2007-006-A
submitted for publication, 2007
A. Arico, M. Donatelli, J. Nagy and S. Serra-Capizzano

A Weighted GCV Method for Lanczos Hybrid Regularization
Math/CS Technical Report TR-2007-004-A
Elec. Trans. Numer. Anal., 28 (2008), pp. 149--167.
J. Chung, J. Nagy and D. P'Leary

Kronecker Product Approximation for Dense Block Toeplitz-plus-Hankel Matrices
Math/CS Technical Report TR-2006-013-A
Num. Lin. Alg. Applic., 14 (2007), pp. 581--602.
M. Kilmer and J. Nagy

High-Resolution Iris Image Reconstruction from Low-Resolution Imagery
Math/CS Technical Report TR-2006-14-A
Advanced Signal Processing Algorithms, Architectures, and Implementations IV, F. T. Luk, Editor, SPIE Proceedings Series, volume 6313 (2006).
R. Barnard, V. Pauca, T. Torgersen, R. Plem- mons, S. Prasad, J. van der Gracht, J. Nagy, J. Chung, G. Behrmann, S. Mathews, and M. Mirotznik

Numerical Methods for Coupled Super-Resolution
Math/CS Technical Report TR-2005-018-A
Inverse Problems, 22 (2006), pp. 1261-1272.
J. Chung, E. Haber and J. Nagy

Kronecker Product Approximation for Three-Dimensional Imaging Applications
IEEE Trans. Image Proc., 15 (2006), pp. 604-613
J. Nagy and M. Kilmer
(abstract) (paper)

Covariance Preconditioned Iterative Methods for Nonnegatively Constrained Astronomical Imaging
SIAM J. Matrix Anal. and Appl., 27 (2006), pp. 1184--1197.
J. Bardsley and J. Nagy
(abstract) (paper)

Blind Iterative Restoration of Images with Spatially-Varying Blur
Optics Express, 14 (2006), pp. 1767--1782.
J. Bardsley, S. Jefferies, J. Nagy, and R. Plemmons
(abstract) (paper)

Multiple Image Deblurring with Spatially Variant PSFs
Astron. Astrophys., 434 (2005), pp. 795-800.
R. Vio, J. Nagy, L. Tenorio and W. Wamsteker
(abstract) (paper)

Quasi-Newton Methods for Image Restoration
in Advanced Signal Processing Algorithms, Architectures, and Implementations IX, F. T. Luk, Editor, SPIE Proceedings, volume 5559 (2004), pp. 412--422.
J. Nagy and K. Palmer
(abstract) (paper)

Kronecker Products in Image Restoration
Advanced Signal Processing Algorithms, Architectures, and Implementations VIII, Franklin T. Luk, Editor, 5205, (2004), pp. 369--379.
J. Nagy and L. Perrone
(abstract) (paper)

Anti-reflective Boundary Conditions and Fast 2D Deblurring Models
Advanced Signal Processing Algorithms, Architectures, and Implementations VIII, Franklin T. Luk, Editor, 5205, (2004), pp. 380--389.
M. Donatelli, C. Estatico, J. Nagy, L. Perrone and S. Serra-Capizzano
(abstract) (paper)

Estimation of Regularization Parameters in Multiple-Image Deblurring
Astron. Astrophys., 423 (2004), 1179--1186.
R. Vio, P. Ma, W. Zhong, J. Nagy, L. Tenorio and W. Wamsteker
(abstract) (paper)

A Simple by Efficient Algorithm for Multiple-Image Deblurring
Astron. Astrophys., 416 (2004), 403--410.
R. Vio, J. Nagy, L. Tenorio and W. Wamsteker
(abstract) (paper)

Kronecker Product Approximations for Image Restoration with Reflexive Boundary Conditions
SIAM J. Matrix Anal. and Appl., 25 (2004), 829--841.
J. Nagy, M. Ng and L. Perrone
(abstract) (paper)

Iterative Methods for Image Deblurring: A Matlab Object Oriented Approach
Numerical Algorithms, 36 (2004), 73--93.
James G. Nagy, K. Palmer and L. Perrone
(abstract) (paper) (Matlab software)

Steepst Descent, CG and Iterative Regularization of Ill-Posed Problems
BIT, 43 (2003), 1003--1017.
J. Nagy, and K. Palmer
(abstract) (paper)

Digital Deblurring of CMB Maps II: Asymmetric Point Spread Function
Astron. Astrophys., 408 (2003), pp. 835--843.
R. Vio, J. Nagy, L. Tenorio, P. Andreani, C. Baccigalupi, and W. Wamsteker
(abstract) (paper)

Digital Deblurring of CMB Maps: Performance and Efficient Implementation
Astron. Astrophys., 401 (2003), pp. 389--404.
R. Vio, J. Nagy, L. Tenorio, P. Andreani, C. Baccigalupi, and W. Wamsteker
(abstract) (paper)

Bound Constrained Regularization for Ill-Posed Problems
Unpublished report, 2002.
Daniel Dementiev and James G. Nagy
(abstract) (paper)

Image Restoration through Subimages and Confidence Images
Elec. Trans. Num. Anal., 13 (2002), pp. 22--37.
Dianne P. O'Leary and James G. Nagy
(abstract and paper)

Iterative Restoration of Wavefront Coded Imagery for Focus Invariance
OSA Trends in Optics and Photonics (TOPS), Integrated Computational Imaging Systems, OSA Technical Digest, Washington, D.C., 2001.
Joseph van der Gracht, James G. Nagy, Victor P. Pauca and Robert J. Plemmons
(abstract) (paper)

Displaying confidence images ( Please see our html version of this article! )
Technical Report CS-TR-4161, Department of Computer Science, University of Maryland, College Park, MD, 2000.
Dianne P. O'Leary and James G. Nagy
(view abstract) (get compressed ps file)

Enforcing nonnegativity in image reconstruction algorithms
in Mathematical Modeling, Estimation, and Imaging, David C. Wilson, et.al., Eds., 4121 (2000), pg. 182--190.
James G. Nagy and Zdenek Strakos
(view abstract) (get compressed ps file)

Optimal Kronecker Product Approximation of Block Toeplitz Matrices
SIAM J. Matrix Anal. and Appl., 22 (2000), pp. 155--172.
Julie Kamm and James G. Nagy
(view abstract) (get compressed ps file)

Quasi-Newton Approach to Nonnegative Image Restorations
Linear Alg. and Appl., 316 (2000), pp. 223--236.
Martin Hanke, James G. Nagy and Curt Vogel
(view abstract) (get compressed ps file)

Kronecker Product and SVD Approximations for Separable Spatially Variant Blurs
Advanced Signal Processing Algorithms, Architectures, and Implementations VIII, Franklin T. Luk, Editor, 3461 (1998), pp.~358--369.
Julie Kamm and James G. Nagy
(view abstract) (get compressed ps file)

Kronecker Product and SVD Approximations in Image Restoration
Linear Algebra Appl., 284 (1998), pg. 177--192.
Julie Kamm and James G. Nagy
(view abstract) (get compressed ps file)

Inverse Toeplitz Preconditioners for Ill-Posed Problems
Linear Algebra Appl., 284 (1998), pg. 137--156.
Martin Hanke and James G. Nagy
(view abstract) (get compressed ps file)

A Total Least Squares Method for Toeplitz Systems of Equations,
BIT, 38 (1998), pp. 560--582.
Julie Kamm and James G. Nagy
(view abstract) (get compressed ps file)

Restoring Images Degraded by Spatially-Variant Blur,
SIAM J. Sci. Comput., 19 (1998), pp. 1063--1082.
James G. Nagy and Dianne P. O'Leary
(view abstract) (get compressed ps file)

Fast Iterative Image Restoration with a Space-Varying PSF
in Advanced Signal Processing Algorithms, Architectures, and Implementations IV, Franklin T. Luk, Editor, 3162 (1997), pp.~388--399.
James G. Nagy and Dianne P. O'Leary
(view abstract) (get compressed ps file)

Space-Varying Restoration of Optical Images,
to appear in J. Optic. Soc. Amer. A, 1997.
James G. Nagy , Pau'l Pauca, Robert J. Plemmons and Todd C. Torgersen
(view abstract) (get compressed ps file)

Decomposition of Block Toeplitz Matrices into a Sum of Kronecker Products with Applications in Image Restoration,
SMU Department of Mathematics Technical Report 96-1
James G. Nagy
(view abstract) (get compressed ps file)

Iterative Image Restoration Using Approximate Inverse Preconditioning,
IEEE Trans. Image Processing, 5 (1996), pp.~1151--1162.
James G. Nagy , Robert J. Plemmons and Todd C. Torgersen

Restoration of Atmospherically Blurred Images by Symmetric Indefinite Conjugate Gradient Techniques,
Inverse Problems, 12 (1996), pp.~157--173.
Martin Hanke and James G. Nagy and Martin Hanke
(view abstract) (get compressed ps file)

Iterative Techniques for the Solution of Toeplitz Systems,
SIAM News, Volume 28, Number 7, August/September, 1995.
James G. Nagy

Applications of Toeplitz Systems,
SIAM News, Volume 28, Number 8, October, 1995.
James G. Nagy

Displacement Preconditioners for Toeplitz Least Squares Iterations,
Electron. Trans. Numer. Anal. 2 (1994), pp.~1--13.
Raymond H. Chan James G. Nagy and Robert J. Plemmons

Toeplitz Approximate Inverse Preconditioner for Banded Toeplitz Matrices,
Numer. Algor. 7 (1994), pp.~183--199.
Martin Hanke and James G. Nagy

Circulant Preconditioned Toeplitz Least Squares Iterations,
SIAM J. Matrix Anal. Appl. 15 (1994), pp.~80--97.
Raymond H. Chan James G. Nagy and Robert J. Plemmons

Fast Algorithms for the Regularization of Banded Toeplitz Least Squares Problems,
in Advanced Signal Processing Algorithms, Architectures, and Implementations IV, Franklin T. Luk, Editor, 2295 (1994), pp.~566--575.
James G. Nagy

Fast restoration of atmospherically blurred images
in Advanced Signal Processing Algorithms, Architectures, and Implementations IV, Franklin T. Luk, Editor, 2295 (1994), pp.~542--553.
James G. Nagy , Robert J. Plemmons and Todd C. Torgersen

Preconditioned Iterative Regularization for Ill-Posed Problems
in Numerical Linear Algebra and Scientific Computing, eds. L. Reichel, A. Ruttan and R. S. Varga, de Gruyter, Berlin, 1993, pp.~141--163.
Martin Hanke, James G. Nagy and Robert J. Plemmons

FFT-Based Preconditioners for Toeplitz-Block Least Squares Problems,
SIAM J. Numer. Anal. 30 (1993), pp.~1740--1768.
Raymond H. Chan James G. Nagy and Robert J. Plemmons

Block RLS using Row Householder Reflections
Lin. Alg. and Applic. 188 (1993), pp.~31--62.
Adam W. Bojanczyk, James G. Nagy and Robert J. Plemmons

Fast Inverse $QR$ Factorization for Toeplitz Matrices,
SIAM J. Sci. Stat. Comput. 14 (1993), pp. 1174--1193.
James G. Nagy

Image Restoration using FFT-Based Preconditioners
Proceedings to the Cornelius Lanczos International Centenary Conference, December, 1993.
James G. Nagy

Image Restoration using Fast Fourier and Wavelet Transforms
Substance Identification Analytics proceedings, Innsbruck, Austria, October, 1993, pp. 369--380.
William J. Harrod, James G. Nagy and Robert J. Plemmons

An Inverse Factorization Algorithm for Linear Prediction,
Lin. Alg. and Applic. V172 (1992), pp. 169--195.
James G. Nagy and Robert J. Plemmons

Iterative Image Restoration using FFT-Based Preconditioners,
Proceedings to the $30^{th}$ Annual Allerton Conference on Communication, Control and Computing, University of Illinois at Urbana-Champaign, October 1992, pp. 257--266.
James G. Nagy and Robert J. Plemmons

Block Circulant Preconditioners for 2-dimensional Deconvolution Problems,
Proceedings to the Conference on Advanced Signal Processing Algorithms, Architectures and Implementations III, vol. 1770, San Diego, CA, July 1992, pp. 60--71.
Raymond H. Chan James G. Nagy and Robert J. Plemmons

Some Fast Toeplitz Least Squares Algorithms
Conference on Advanced Signal Processing Algorithms, Architectures and Implementation II, vol.\ 1566, San Diego, CA, July 1991.
James G. Nagy and Robert J. Plemmons