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Multi-Volumetric Refocusing of Light Fields
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  • Sakila S. Jayaweera ,
  • Chamira Edussooriya ,
  • Chamith Wijenayake ,
  • Pan Agathoklis ,
  • Len Bruton
Sakila S. Jayaweera
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Chamira Edussooriya
University of Moratuwa

Corresponding Author:[email protected]

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Chamith Wijenayake
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Pan Agathoklis
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Len Bruton
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Geometric information of scenes available with four dimensional (4-D) light fields (LFs) pave the way for post-capture refocusing. Light filed refocusing methods proposed
so far have been limited to a single planar or a volumetric
region of a scene. In this paper, we demonstrate simultaneous refocusing of multiple volumetric regions in LFs. To this end, we employ a 4-D sparse finite-extent impulse response (FIR) filter consisting of multiple hyperfan-shaped passbands. We design the 4-D sparse FIR filter as an optimal filter in the least-squares sense. Experimental results confirm that the proposed filter provides 64% average reduction in computational complexity with negligible degradation in the fidelity of multi-volumetric refocused LFs compared to a 4-D nonsparse FIR filter.
2021Published in IEEE Signal Processing Letters volume 28 on pages 31-35. 10.1109/LSP.2020.3043990