Research on Multi-Focus Image Fusion Algorithm Based on Algebraic Multigrid Method

An adaptive multi-focus image fusion algorithm based on algebraic multigrid (AMG) method is proposed for the capability to extract structural information of an image. The data of the coarse level is extracted to reconstruct the image block, appropriate source image block is selected into the fusion result according to the mean square error between the reconstructed image block and the original image block. For smoothing the fused result, an adaptive strategy is used. Experimental results show that most of the clear objects can be retained in the fused image with the proposed algorithm without loss of effective information.