You need to be logged in to carry this out. If you don't have an account, feel free to create one. |
COOKIES: By using this website you agree that we can place Google Analytics Cookies on your device for performance monitoring. |
University of Cambridge > Talks.cam > Microsoft Research Machine Learning and Perception Seminars > Noise estimation by PDE-constrained optimisation
Noise estimation by PDE-constrained optimisationAdd to your list(s) Download to your calendar using vCal
If you have a question about this talk, please contact Microsoft Research Cambridge Talks Admins. This talk has been canceled/deleted A key issue in image denoising is an adequate choice of the correct noise model. In a variational approach this amounts to the choice of the data fidelity and its weighting. Depending on this choice, different results are obtained. In this talk I will discuss a PDE -constrained optimization approach for the determination of the noise distribution in total variation (TV) image denoising. An optimization problem for the determination of the weights correspondent to different types of noise distributions is stated and existence of an optimal solution is proved. A tailored regularization approach for the approximation of the optimal parameter values is proposed thereafter and its consistency studied. Additionally, the differentiability of the solution operator is proved and an optimality system characterizing the optimal solutions of each regularized problem is derived. The optimal parameter values are numerically computed by using a quasi-Newton method, together with semismooth Newton type algorithms for the solution of the TV-subproblems. The talk is furnished with numerical examples computed on simulated data. This is joint work with Juan Carlos De Los Reyes This talk is part of the Microsoft Research Machine Learning and Perception Seminars series. This talk is included in these lists:This talk is not included in any other list Note that ex-directory lists are not shown. |
Other listsquantitative history seminar Individual in the Labour Market Research Group Invitation Type the title of a new list here Type the title of a new list here Darwin Humanities and Social Sciences SeminarOther talksSingularities of Hermitian-Yang-Mills connections and the Harder-Narasimhan-Seshadri filtration A domain-decomposition-based model reduction method for convection-diffusion equations with random coefficients Carers and Careers: The Impact of Caring on Academic Careers Highly Energy Efficient Key-value Store for In-network Computing Phylogenetic hypothesis of the Oleeae tribe (Oleaceae) Diversification and molecular evolution patterns in plastid and nuclear ribosomal DNA Macrophage-derived extracellular succinate licenses neural stem cells to suppress chronic neuroinflammation Black and British Migration “Modulating Tregs in Cancer and Autoimmunity” To be confirmed A rose by any other name Scale and anisotropic effects in necking of metallic tensile specimens Protein targeting within the chloroplast: a cell-biological view of starch biosynthesis |