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Kronecker product approximation for preconditioning in three-dimensional imaging applications

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2 Author(s)
Nagy, J.G. ; Dept. of Math. & Comput. Sci., Emory Univ., Atlanta, GA, USA ; Kilmer, M.E.

We derive Kronecker product approximations, with the help of tensor decompositions, to construct approximations of severely ill-conditioned matrices that arise in three-dimensional (3-D) image processing applications. We use the Kronecker product approximations to derive preconditioners for iterative regularization techniques; the resulting preconditioned algorithms allow us to restore 3-D images in a computationally efficient manner. Through examples in microscopy and medical imaging, we show that the Kronecker approximation preconditioners provide a powerful tool that can be used to improve efficiency of iterative image restoration algorithms.

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Image Processing, IEEE Transactions on  (Volume:15 ,  Issue: 3 )