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论文类型：会议论文
发表时间：2008-05-16
收录刊物：EI
页面范围：2557-2560
摘要：Mutual information (MI) has developed into an accurate measure for rigid and affine mono- and multi-modality image registration. The robustness of the measure, however, is questionable. To improve its robustness, in the present paper, a novel joint histogram estimation scheme is proposed in the calculation of MI for image registration. The new estimation scheme updates the histogram continuously by using an exponential function. Experimental results show that, compared with the partial volume interpolation (PVI), the suggested histogram estimation scheme yields a better MI registration function. The MI registration measure derived from the proposed scheme significantly reduces the interpolation-induced artefacts, encounters less local maxima and improves the registration robustness. © 2008 IEEE.