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Gradient based nonuniform subsampling for information-theoretic alignment methods.

Research paper by Mert M Sabuncu, Peter P Ramadge

Indexed on: 03 Feb '07Published on: 03 Feb '07Published in: Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference



Abstract

We examine the computation of information-theoretic image registration metrics and propose two (deterministic and stochastic) nonuniform subsampling methods for improving the efficiency. The proposed schemes attempt to use only the most relevant information as the basis of the computation. Both methods are shown to yield considerable improvement over the current practice of uniform subsampling. Theoretical and experimental evidence is provided.