Per Christian Hansen

91 papers Misc 1Journal 77Unranked 13
YearRankTypeTitle / Venue / Authors
2026 J jnl
On spectral properties and fast initial convergence of the Kaczmarz method.
CoRR
Per Christian Hansen, Michiel E. Hochstenbach
2024 J jnl
Inferring Object Boundaries and Their Roughness with Uncertainty Quantification.
J. Math. Imaging Vis.
Babak Maboudi Afkham, Nicolai André Brogaard Riis, Yiqiu Dong, Per Christian Hansen
2023 J jnl
CUQIpy - Part I: computational uncertainty quantification for inverse problems in Python.
CoRR
Nicolai André Brogaard Riis, Amal Mohammed A. Alghamdi, Felipe Uribe, Silja L. Christensen, Babak Maboudi Afkham, Per Christian Hansen, Jakob Sauer Jørgensen
2023 J jnl
CUQIpy - Part II: computational uncertainty quantification for PDE-based inverse problems in Python.
CoRR
Amal Mohammed A. Alghamdi, Nicolai André Brogaard Riis, Babak Maboudi Afkham, Felipe Uribe, Silja L. Christensen, Per Christian Hansen, Jakob Sauer Jørgensen
2023 J jnl
Horseshoe Priors for Edge-Preserving Linear Bayesian Inversion.
SIAM J. Sci. Comput.
Felipe Uribe, Yiqiu Dong, Per Christian Hansen
2023 J jnl
Inferring Features with Uncertain Roughness.
CoRR
Babak Maboudi Afkham, Nicolai André Brogaard Riis, Yiqiu Dong, Per Christian Hansen
2023 J jnl
Uncertainty Quantification of Inclusion Boundaries in the Context of X-Ray Tomography.
SIAM/ASA J. Uncertain. Quantification
Babak Maboudi Afkham, Yiqiu Dong, Per Christian Hansen
2022 J jnl
A Hybrid Gibbs Sampler for Edge-Preserving Tomographic Reconstruction with Uncertain View Angles.
SIAM/ASA J. Uncertain. Quantification
Felipe Uribe, Johnathan M. Bardsley, Yiqiu Dong, Per Christian Hansen, Nicolai André Brogaard Riis
2022 J jnl
GMRES methods for tomographic reconstruction with an unmatched back projector.
J. Comput. Appl. Math.
Per Christian Hansen, Ken Hayami, Keiichi Morikuni
2021 J jnl
A Twin Error Gauge for Kaczmarz's Iterations.
SIAM J. Sci. Comput.
Bart S. van Lith, Per Christian Hansen, Michiel E. Hochstenbach
2021 J jnl
Computed Tomography Reconstruction with Uncertain View Angles by Iteratively Updated Model Discrepancy.
J. Math. Imaging Vis.
Nicolai André Brogaard Riis, Yiqiu Dong, Per Christian Hansen
2021 J jnl
GMRES Methods for Tomographic Reconstruction with an Unmatched Back Projector.
CoRR
Per Christian Hansen, Ken Hayami, Keiichi Morikuni
2021 — conf
Stopping Rules for Algebraic Iterative Reconstruction Methods in Computed Tomography.
ICCSA (Workshops)
Per Christian Hansen, Jakob Sauer Jørgensen, Peter Winkel Rasmussen
2021 J jnl
Stopping Rules for Algebraic Iterative Reconstruction Methods in Computed Tomography.
CoRR
Per Christian Hansen, Jakob Sauer Jørgensen, Peter Winkel Rasmussen
2021 J jnl
Uncertainty Quantification of Inclusion Boundaries in the Context of X-ray Tomography.
CoRR
Babak Maboudi Afkham, Yiqiu Dong, Per Christian Hansen
2020 J jnl
MCMC Algorithms for Computational UQ of Nonnegativity Constrained Linear Inverse Problems.
SIAM J. Sci. Comput.
Johnathan M. Bardsley, Per Christian Hansen
2019 J jnl
A twin error gauge for Kaczmarz's iterations.
CoRR
Bart S. van Lith, Per Christian Hansen, Michiel E. Hochstenbach
2019 J jnl
Fixing Nonconvergence of Algebraic Iterative Reconstruction with an Unmatched Backprojector.
SIAM J. Sci. Comput.
Yiqiu Dong, Per Christian Hansen, Michiel E. Hochstenbach, Nicolai André Brogaard Riis
2019 J jnl
Hybrid enriched bidiagonalization for discrete ill-posed problems.
Numer. Linear Algebra Appl.
Per Christian Hansen, Yiqiu Dong, Kuniyoshi Abe
2019 J jnl
IR Tools: a MATLAB package of iterative regularization methods and large-scale test problems.
Numer. Algorithms
Silvia Gazzola, Per Christian Hansen, James G. Nagy
2018 J jnl
AIR Tools II: algebraic iterative reconstruction methods, improved implementation.
Numer. Algorithms
Per Christian Hansen, Jakob Sauer Jørgensen
2018 J jnl
Joint CT Reconstruction and Segmentation With Discriminative Dictionary Learning.
IEEE Trans. Computational Imaging
Yiqiu Dong, Per Christian Hansen, Hans Martin Kjer
2018 J jnl
Unmatched Projector/Backprojector Pairs: Perturbation and Convergence Analysis.
SIAM J. Sci. Comput.
Tommy Elfving, Per Christian Hansen
2017 J jnl
Convergence analysis for column-action methods in image reconstruction.
Numer. Algorithms
Tommy Elfving, Per Christian Hansen, Touraj Nikazad
2017 J jnl
Erratum to: Convergence analysis for column-action methods in image reconstruction.
Numer. Algorithms
Tommy Elfving, Per Christian Hansen, Touraj Nikazad
2017 J jnl
Tomographic image reconstruction using training images.
J. Comput. Appl. Math.
Sara Soltani, Martin S. Andersen, Per Christian Hansen
2017 — conf
User-Friendly Simultaneous Tomographic Reconstruction and Segmentation with Class Priors.
SSVM
Hans Martin Kjer, Yiqiu Dong, Per Christian Hansen
2015 J jnl
A Tensor-Based Dictionary Learning Approach to Tomographic Image Reconstruction.
CoRR
Sara Soltani, Misha Elena Kilmer, Per Christian Hansen
2015 J jnl
Comparison of Reconstruction Methods for Free-Space Propagation Phase-Contrast Tomography.
CoRR
Rasmus Dalgas Rasmussen, Jakob Sauer Jørgensen, Henning Friis Poulsen, Per Christian Hansen
2015 J jnl
Tomographic Image Reconstruction using Dictionary Priors.
CoRR
Sara Soltani, Martin S. Andersen, Per Christian Hansen
2014 J jnl
Generalized row-action methods for tomographic imaging.
Numer. Algorithms
Martin S. Andersen, Per Christian Hansen
2014 J jnl
Multicore Performance of Block Algebraic Iterative Reconstruction Methods.
SIAM J. Sci. Comput.
Hans Henrik B. Sørensen, Per Christian Hansen
2013 J jnl
Oblique projections and standard-form transformations for discrete inverse problems.
Numer. Linear Algebra Appl.
Per Christian Hansen
2012 J jnl
AIR Tools - A MATLAB package of algebraic iterative reconstruction methods.
J. Comput. Appl. Math.
Per Christian Hansen, Maria Saxild-Hansen
2012 J jnl
Semiconvergence and Relaxation Parameters for Projected SIRT Algorithms.
SIAM J. Sci. Comput.
Tommy Elfving, Per Christian Hansen, Touraj Nikazad
2011 J jnl
Accelerated gradient methods for total-variation-based CT image reconstruction
CoRR
Jakob Heide Jørgensen, Tobias Lindstrøm Jensen, Per Christian Hansen, Søren Holdt Jensen, Emil Y. Sidky, Xiaochuan Pan
2011 J jnl
Implementation of an Optimal First-Order Method for Strongly Convex Total Variation Regularization
CoRR
Tobias Lindstrøm Jensen, Jakob Heide Jørgensen, Per Christian Hansen, Søren Holdt Jensen
2010 J jnl
Algorithms and software for total variation image reconstruction via first-order methods.
Numer. Algorithms
Joachim Dahl, Per Christian Hansen, Søren Holdt Jensen, Tobias Lindstrøm Jensen
2009 J jnl
A hybrid method for the parallel computation of Green's functions.
J. Comput. Phys.
Dan Erik Petersen, Song Li, Kurt Stokbro, Hans Henrik B. Sørensen, Per Christian Hansen, Stig Skelboe, Eric Darve
2009 J jnl
Reconstruction of Single-Grain Orientation Distribution Functions for Crystalline Materials.
SIAM J. Imaging Sci.
Per Christian Hansen, Henning Osholm Sørensen, Zsuzsanna Sükösd, Henning Friis Poulsen
2008 J jnl
Block tridiagonal matrix inversion and fast transmission calculations.
J. Comput. Phys.
Dan Erik Petersen, Hans Henrik B. Sørensen, Per Christian Hansen, Stig Skelboe, Kurt Stokbro
2007 — conf
A Convex Programming Approach to Anisotropic Smoothing.
ICIP (2)
Joachim Dahl, Søren Holdt Jensen, Per Christian Hansen
2007 J jnl
A Projection-Based Approach to General-Form Tikhonov Regularization.
SIAM J. Sci. Comput.
Misha Elena Kilmer, Per Christian Hansen, Malena I. Español
2007 J jnl
Regularization Tools version 4.0 for Matlab 7.3.
Numer. Algorithms
Per Christian Hansen
2007 J jnl
Subspace-Based Noise Reduction for Speech Signals via Diagonal and Triangular Matrix Decompositions: Survey and Analysis.
EURASIP J. Adv. Signal Process.
Per Christian Hansen, Søren Holdt Jensen
2006 — conf
Large-Scale Methods in Image Deblurring.
PARA
Per Christian Hansen, Toke Koldborg Jensen
2006 J jnl
Smoothing-Norm Preconditioning for Regularizing Minimum-Residual Methods.
SIAM J. Matrix Anal. Appl.
Per Christian Hansen, Toke Koldborg Jensen
2005 J jnl
Prewhitening for rank-deficient noise in subspace methods for noise reduction.
IEEE Trans. Signal Process.
Per Christian Hansen, Søren Holdt Jensen
2005 J jnl
UTV Expansion Pack: Special-purpose rank-revealing algorithms.
Numer. Algorithms
Ricardo D. Fierro, Per Christian Hansen
2002 J jnl
Deconvolution and Regularization with Toeplitz Matrices.
Numer. Algorithms
Per Christian Hansen
2001 J jnl
Computing Symmetric Rank-Revealing Decompositions via Triangular Factorization.
SIAM J. Matrix Anal. Appl.
Per Christian Hansen, Plamen Y. Yalamov
2000 J jnl
Stabilization by Perturbation of a 4
SIAM J. Matrix Anal. Appl.
Per Christian Hansen, Plamen Y. Yalamov
1999 Misc conf
Experimental comparison of signal subspace based noise reduction methods.
ICASSP
Peter Søren Kirk Hansen, Per Christian Hansen, Steffen Duus Hansen, John Aasted Sørensen
1999 J jnl
Regularization Tools Version 3.0 for Matlab 5.2.
Numer. Algorithms
Per Christian Hansen
1999 J jnl
Tikhonov Regularization and Total Least Squares.
SIAM J. Matrix Anal. Appl.
Gene H. Golub, Per Christian Hansen, Dianne P. O'Leary
1999 J jnl
UTV Tools: Matlab templates for rank-revealing UTV decompositions.
Numer. Algorithms
Ricardo D. Fierro, Per Christian Hansen, Peter Søren Kirk Hansen
1998 J jnl
A Coarse-Grained Parallel
Parallel Comput.
Tzvetan Ostromsky, Per Christian Hansen, Zahari Zlatev
1998 J jnl
FIR filter representations of reduced-rank noise reduction.
IEEE Trans. Signal Process.
Per Christian Hansen, Søren Holdt Jensen
1997 J jnl
Low-rank revealing UTV decompositions.
Numer. Algorithms
Ricardo D. Fierro, Per Christian Hansen
1997 J jnl
Regularization by Truncated Total Least Squares.
SIAM J. Sci. Comput.
Ricardo D. Fierro, Gene H. Golub, Per Christian Hansen, Dianne P. O'Leary
1996 — conf
Filter Model of Reduced-Rank Noise Reduction.
PARA
Per Christian Hansen, Søren Holdt Jensen
1996 — conf
Noise reduction of speech signals using the rank-revealing ULLV decomposition.
EUSIPCO
Peter Søren Kirk Hansen, Per Christian Hansen, Steffen Duus Hansen, John Aasted Sørensen
1996 J jnl
Piecewise Polynomial Solutions Without a priori Break Points.
Numer. Linear Algebra Appl.
Per Christian Hansen, Klaus Mosegaard
1996 — conf
Reduced-rank noise reduction: A filter-bank interpretation.
EUSIPCO
Søren Holdt Jensen, Per Christian Hansen
1995 — conf
A Parallel Sparse
PARA
Tzvetan Ostromsky, Per Christian Hansen, Zahari Zlatev
1995 — conf
Comparison of Parallel Computers Using Air Pollution Models.
PP
John Brown, Per Christian Hansen, P. Kaae, C. Keable, Wojciech Owczarz, Jerzy Wasniewski, Zahari Zlatev
1995 J jnl
Implementation of QR Up- and Downdating on a Massively Parallel Computer.
Parallel Comput.
Claus Bendtsen, Per Christian Hansen, Kaj Madsen, Hans Bruun Nielsen, Mustafa Ç. Pinar
1995 J jnl
Locally Optimized Reordering Algorithm and its Application to a Parallel Sparse Linear System Solver.
Computing
Kyle A. Gallivan, Per Christian Hansen, Tzvetan Ostromsky, Zahari Zlatev
1995 J jnl
Reduction of broad-band noise in speech by truncated QSVD.
IEEE Trans. Speech Audio Process.
Søren Holdt Jensen, Per Christian Hansen, Steffen Duus Hansen, John Aasted Sørensen
1995 J jnl
Test Matrices for Regularization Methods.
SIAM J. Sci. Comput.
Per Christian Hansen
1994 J jnl
A systolic implementation of the Chan/Foster RRQR algorithm.
IEEE Trans. Signal Process.
Flavio Lorenzelli, Per Christian Hansen, Tony F. Chan, Kung Yao
1994 — conf
Comparison of Massively Parallel SIMD Computers Using Air Pollution Models.
PARA
John Brown, Per Christian Hansen, Jerzy Wasniewski, Zahari Zlatev
1994 J jnl
Corrigendum: Algorithm 729; FORTRAN subroutines for general Toeplitz systems.
ACM Trans. Math. Softw.
Per Christian Hansen, Tony F. Chan
1994 J jnl
Low-rank revealing QR factorizations.
Numer. Linear Algebra Appl.
Tony F. Chan, Per Christian Hansen
1994 — conf
Parallel Issues of Regularization Problems.
PARA
Per Christian Hansen
1994 J jnl
Regularization Tools: A Matlab package for analysis and solution of discrete ill-posed problems.
Numer. Algorithms
Per Christian Hansen
1994 — conf
Two Enhancements in a Partitioned Sparse Code.
PARA
Per Christian Hansen, Tzvetan Ostromsky, Zahari Zlatev
1993 J jnl
Erratum: A Look-Ahead Levinson Algorithm for Indefinite Toeplitz Systems.
SIAM J. Matrix Anal. Appl.
Tony F. Chan, Per Christian Hansen
1993 J jnl
The Use of the L-Curve in the Regularization of Discrete Ill-Posed Problems.
SIAM J. Sci. Comput.
Per Christian Hansen, Dianne P. O'Leary
1992 J jnl
A Look-Ahead Levinson Algorithm for Indefinite Toeplitz Systems.
SIAM J. Matrix Anal. Appl.
Tony F. Chan, Per Christian Hansen
1992 J jnl
A block algorithm for computing rank-revealing QR factorizations.
Numer. Algorithms
Christian H. Bischof, Per Christian Hansen
1992 J jnl
A look-ahead Levinson algorithm for general Toeplitz systems.
IEEE Trans. Signal Process.
Tony F. Chan, Per Christian Hansen
1992 — conf
A systolic rank revealing QR algorithm.
ASAP
Flavio Lorenzelli, Kung Yao, Tony F. Chan, Per Christian Hansen
1992 J jnl
Analysis of Discrete Ill-Posed Problems by Means of the L-Curve.
SIAM Rev.
Per Christian Hansen
1992 J jnl
FORTRAN subroutines for general Toeplitz systems.
ACM Trans. Math. Softw.
Per Christian Hansen, Tony F. Chan
1992 J jnl
Some Applications of the Rank Revealing QR Factorization.
SIAM J. Sci. Comput.
Tony F. Chan, Per Christian Hansen
1992 J jnl
The Modified Truncated SVD Method for Regularization in General Form.
SIAM J. Sci. Comput.
Per Christian Hansen, Takashi Sekii, Hiromoto Shibahashi
1991 J jnl
Structure-Preserving and Rank-Revealing QR-Factorizations.
SIAM J. Sci. Comput.
Christian H. Bischof, Per Christian Hansen
1990 J jnl
Computing Truncated Singular Value Decomposition Least Squares Solutions by Rank Revealing QR-Factorizations.
SIAM J. Sci. Comput.
Tony F. Chan, Per Christian Hansen
1990 J jnl
Truncated Singular Value Decomposition Solutions to Discrete Ill-Posed Problems with Ill-Determined Numerical Rank.
SIAM J. Sci. Comput.
Per Christian Hansen
1988 J jnl
Computation of the singular value expansion.
Computing
Per Christian Hansen