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NA
2007
105views more  NA 2007»
13 years 7 months ago
Orthogonal projection regularization operators
Abstract. Tikhonov regularization often is applied with a finite difference regularization operator that approximates a low-order derivative. This paper proposes the use of ortho...
Serena Morigi, Lothar Reichel, Fiorella Sgallari
JCAM
2010
94views more  JCAM 2010»
13 years 2 months ago
Cascadic multilevel methods for ill-posed problems
Multilevel methods are popular for the solution of well-posed problems, such as certain boundary value problems for partial differential equations and Fredholm integral equations ...
Lothar Reichel, Andriy Shyshkov
SIAMMAX
2010
156views more  SIAMMAX 2010»
13 years 2 months ago
Preconditioned Conjugate Gradient Method for Optimal Control Problems with Control and State Constraints
Optimality systems and their linearizations arising in optimal control of partial differential equations with pointwise control and (regularized) state constraints are considered. ...
Roland Herzog, Ekkehard W. Sachs
TIP
2010
89views more  TIP 2010»
13 years 2 months ago
Fast Nonconvex Nonsmooth Minimization Methods for Image Restoration and Reconstruction
Nonconvex nonsmooth regularization has advantages over convex regularization for restoring images with neat edges. However, its practical interest used to be limited by the difficu...
Mila Nikolova, Michael K. Ng, Chi-Pan Tam
ECCV
2010
Springer
13 years 11 months ago
The Semi-Explicit Shape Model for Multi-object Detection and Classification
We propose a model for classification and detection of object classes where the number of classes may be large and where multiple instances of object classes may be present in an i...