Multi-focus Image Fusion for Visual Sensor Networks

Image fusion in visual sensor networks (VSNs) aims to combine information from multiple images of the same scene in order to transform a single image with more information. Image fusion methods based on discrete cosine transform (DCT) are less complex and time saving in DCT based standards of image and video which makes them more suitable for VSN applications. In this paper an efficient algorithm to fusion of multi-focus images in DCT domain is proposed. Sum of modified laplacian (SML) of corresponding blocks of source images are used as contrast criterion and blocks with larger value of SML are absorbed to output images. The experimental results on several images show the improvement of proposed algorithm in terms of both subjective and objective quality of fused image relative to other DCT based techniques.