A Focus Measure for Light Field Rendering (WA-L3)

Author(s) : Keita Takahashi (The University of Tokyo, Japan) Akira Kubota (Carnegie Mellon University, USA) Takeshi Naemura (The University of Tokyo, Japan)

Abstract : Light field rendering is a fundamental method for synthesizing free-viewpoint images from a set of multi-viewpoint images. In the simplest case, the scene structure is approximated by a simple plane: a focal plane. This approximation leads to focus-like effects on synthetic images where the focused depth is determined by the focal plane. A serious problem is that the range of the focused depth is too small in most practical cases. In this paper, we propose a focus measure that is specialized for synthetic images by light field rendering. When a set of differently-focused images is generated at a given viewpoint, the proposed focus measure enables us to obtain a depth map and an all in-focus image. Our approach has some remarkable differences with other related techniques, such as depth-from-stereo and depth-from-focus methods. Experimental results show that the proposed method effectively enhances PSNR of the nal synthetic images.

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