Abstract：Many false maxima were generated by B-spline Generalized Partial Volume Estimation (GPVE) or B-spline filter, but they had opposite dispersion effects on joint histogram of two registering images. By integrating the same order B-spline filter and B-spline GPVE, the mixed interpolation algorithm was proposed. When the registered images were rigidly aligned, the smoothness and number of maxima of the normalized mutual information curves were compared by applying many interpolation algorithms, which included the order 1, 3, and 5 B-spline filters, B-spline GPVE, and the new mixed interpolation algorithms. The experimental results show that the new mixed interpolation algorithms with order n B-spline outperform the corresponding B-spline filter and B-spline GPVE in image registration.
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2011, Vol. 31 
