Medical Image Registration Using Co-Occurrence Mutual Information
Lu Zhen · Chinese Journal of Computers · 2007
Mutual Information(MI)is calculated on a pixel by pixel basis.It takes into account only the relationship between corresponding individual pixels and not those of each pixel's respective neighborhood.It ignores the spatial information.This paper proposes a new measure — Co-occurrence mutual information(Co-MI).It is an extension to the mutual information framework which incorporates spatial information about image structure into the registration process and has the potential to improve the accuracy and robustness of image registration.The results indicate that co-occurrence mutual information is a more robust similarity measure for image registration than MI.It is more important that Co-MI can be used in other scope,such as economics,operational research and pattern recognition,just like MI.