Iteratively reconstructing 4D light fields from focal stacks.
Acquiring and representing the 4D space of rays in the world (the light field) is important for many computer vision and graphics applications. In this paper, we propose an iterative method to acquire the 4D light field from a focal stack. First, a discrete refocusing equation is derived from integral imaging principles. With this equation, a linear projection system is formulated to model the focal stack imaging process. Then we reconstruct the 4D light field from the focal stack through solving the inverse problem with a filtering based iterative method. The experimental results show that our approach is effective and outperforms state of the art methods in reconstruction accuracy, reduced sampling, and occluded boundaries.
Applied optics