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A multilevel domain decomposition algorithm for fast O(N2logN) reprojection of tomographic images

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3 Author(s)
Boag, A. ; Dept. of Electr. Eng.-Phys. Electron., Tel Aviv Univ., Israel ; Bresler, Y. ; Michielssen, E.

A novel algorithm for fast computation of tomographic image projections is presented. The method comprises a decomposition of an image into subimages followed by an aggregation of projections computed for the subimages. The multilevel domain decomposition algorithm is formulated as a recursive procedure. The computational cost of the proposed algorithm is comparable to that of FFT-based techniques while it appears to be more flexible than the latter. Numerical results demonstrate the effectiveness of the method

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Image Processing, IEEE Transactions on  (Volume:9 ,  Issue: 9 )