|COOKIES: By using this website you agree that we can place Google Analytics Cookies on your device for performance monitoring.|
Noise estimation by PDE-constrained optimisation
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 listsBioLunch Automating Biology using Robot Scientists CIBB2014
Other talksParamutation in tomato Beta oxidation in signalling and development. What plants can teach us about yeast and animals Health Economics @ Cambridge seminar Railways and population: spatial interactions Reviving Sati’s corpse: the invocation of the Shakti Pithas in modern and contemporary politics Measurement of mechanical properties of diamond via solid particle erosion