Abstract: For most image fusion algorithms split relationship among pixels and treat them more or less independently, this paper proposes a multi-focus image fusion scheme using regional detection through PCA and high-pass filtering. The basic idea is to divide the source images into blocks, and then select the corresponding clear blocks, which is distinguished by high-pass filtering and PCA algorithm, to construct the resultant fused image. Experimental results show that the proposed scheme is more effective than the PCA and the wavelet scheme.

Key words: PCA, high-pass filtering, multi-focus, image fusion