Advanced light-field refocusing through tomographic modeling of the photographed scene

Nicola Viganò (Corresponding author), Pablo Martínez Gil, Charlotte Herzog, Ombeline de la Rochefoucauld, Robert van Liere, Kees Joost Batenburg

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Abstract

Recently we have shown that light-field photography images can be interpreted as limited-angle cone-beam tomography acquisitions. Here, we use this property to develop a direct-space tomographic refocusing formulation that allows one to refocus both unfocused and focused light-field images. We express the reconstruction as a convex optimization problem, thus enabling the use of various regularization terms to help suppress artifacts, and a wide class of existing advanced tomographic algorithms. This formulation also supports super-resolved reconstructions and the correction of the optical system’s limited frequency response (point spread function). We validate this method with numerical and real-world examples.

Original languageEnglish
Pages (from-to)7834-7856
Number of pages23
JournalOptics Express
Volume27
Issue number6
DOIs
Publication statusPublished - 1 Jun 2019

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    Viganò, N., Gil, P. M., Herzog, C., de la Rochefoucauld, O., van Liere, R., & Batenburg, K. J. (2019). Advanced light-field refocusing through tomographic modeling of the photographed scene. Optics Express, 27(6), 7834-7856. https://doi.org/10.1364/OE.27.007834