Abstract
Improvement of medical diagnosis, aided computer surgeries and tumor identification requires an accurate image registration approaches. The registration of multimodal medical images is more complicated than the registration of unimodal medical images due to the variation in luminance between the images. In this paper, an accurate multimodal image registration approach using artificial immune system (AIS) is proposed and the affine transformation model is used in contrast to the most of the related works which assumed rigid transformation model or similarity transformation model. In the proposed approach the LL bands of the discrete wavelet transform (DWT) for the images are used and the normalized mutual information (NMI) is used as a fitness function. The proposed approach achieves good result in the case of noiseless images, noisy images and partial data loss from one of the images. Moreover, the proposed approach does not need any feature extraction or refinement step. To demonstrate the robustness of the proposed approach, it has been compared with two multimodal medical image registration approaches.
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