2019-03-18
Advanced light-field refocusing through tomographic modeling of the photographed scene
Publication
Publication
Optics Express , Volume 27 - Issue 6 p. 7834- 7856
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.
| Additional Metadata | |
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| Imagine Optic, Bordeaux, France | |
| doi.org/10.1364/OE.27.007834 | |
| Optics Express | |
| Volumetric medical x-ray imaging at extremely low dose | |
| Organisation | Centrum Wiskunde & Informatica, Amsterdam (CWI), The Netherlands |
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Viganò, N., Martínez Gil, P., Herzog, C., de la Rochefoucauld, O., Liere, R.V. (Robert Van), & Batenburg, J. (2019). Advanced light-field refocusing through tomographic modeling of the photographed scene. Optics Express, 27(6), 7834–7856. doi:10.1364/OE.27.007834 |
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