Browsing by Author "Steidl, Gabriele"
Now showing 1 - 2 of 2
Results Per Page
Sort Options
- ItemMini-Workshop: Computational Optimization on Manifolds (online meeting)(Zürich : EMS Publ. House, 2020) Herzog, Roland; Steidl, GabrieleThe goal of the mini-workshop was to study the geometry, algorithms and applications of unconstrained and constrained optimization problems posed on Riemannian manifolds. Focus topics included the geometry of particular manifolds, the formulation and analysis of a number of application problems, as well as novel algorithms and their implementation.
- ItemSpectral imaging based on 2D diffraction patterns and a regularization model(Washington D.C. : Optical Society of America, 2018) Nimmer, Max; Steidl, Gabriele; Riesenberg, Rainer; Wuttig, AndreasWe present a variational approach to reconstruct a multispectral image from an array of diffraction patterns captured in one monochromatic image. The mathematical model relies on the superposition of wavelength dependent calibration diffraction patterns and a spectral regularization with second order differences. The necessary preprocessing steps which influence the mathematical setting are discussed in detail. For computing a minimizer of our model we propose an active set method with model specific modifications. We validate our approach by experimental results for spectra within the range of 400 nm to 700 nm.