Medical image registration based on multi-resolution and Powell algorithm
Yan Yan-hua · Jisuanji yingyong yanjiu · 2013
On the basis of the modified Powell algorithm,this paper presented an image registration algorithm depending on multi-resolution strategy,which aimed to solve the problem of local convergence based on mutual information and the Powell algorithm.First,it decomposed wavelet sub-bands of the original images using the wavelet transform.Then it used the modified Powell algorithm to search in the lower band,and guided the previous layer search by the search results.It refined layer by layer,from coarse to fine,achieved the image registration ultimately.The experimental results show that the method is faster,higher precision and better robustness than the traditional methods.And further more,it can avoid the local convergence effectively.