Inverse problems with structural prior information

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Abstract
In this paper we propose a method for the regularization of inverse problems whose solutions are known to exhibit anisotropic characteristics. The method is based on the generalized Tikhonov regularization and on the spatial prior information on the underlying solution. We allow the prior information to be only of approximate nature. In the proposed method, the prior information is incorporated into the regularization operator with the aid of a properly constructed matrix-valued field. Although the approach is deterministic it also has a clear statistical interpretation that will be discussed from the Bayesian viewpoint. The method is applied to two examples, the first is the inversion of a Fredholm integral equation of the first kind and the second is a case study of electrical impedance tomography (EIT).