Iterative reconstruction of an all-focused image by using multiple differently focused images

In this paper, we propose a novel method of all-focused image acquisition using multiple differently focused images. Based on the assumption that depth of the scene changes stepwise, we derive a formula for reconstruction between the desired all-focused image and multiple acquired images; we can reconstruct the all-focused image by iterative use of the formula. We also introduce coarse-to-fine estimation of point spread functions of the acquired images. We show we can reconstruct an all-focused image for a natural scene.