High-resolution lightfield photography using two masks

Optics Express
Zhimin XuEdmund Y Lam

Abstract

A major theme of computational photography is the acquisition of lightfield, which opens up new imaging capabilities, such as focusing after image capture. However, to capture the lightfield, one normally has to sacrifice significant spatial resolution as compared to normal imaging for a fixed sensor size. In this work, we present a new design for lightfield acquisition, which allows for the capture of a higher resolution lightfield by using two attenuation masks. They are positioned at the aperture stop and the optical path respectively, so that the four-dimensional (4D) lightfield spectrum is encoded and sampled by a two-dimensional (2D) camera sensor in a single snapshot. Then, during post-processing, by exploiting the coherence embedded in a lightfield, we can retrieve the desired 4D lightfield with a higher resolution using inverse imaging. The performance of our proposed method is demonstrated with simulations based on actual lightfield datasets.

References

Oct 23, 2002·Applied Optics·W Thomas Cathey, Edward R Dowski
Apr 3, 2008·Applied Optics·Tejaswini MiraniSally L Wood
Sep 8, 2003·Optics Express·Joseph MaitJoseph van der Gracht
Jul 3, 2010·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Xin Zhang, Edmund Y Lam
Jul 3, 2010·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Zhimin Xu, Edmund Y Lam

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Citations

Aug 19, 2015·IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society·Yuping WangBaocai Yin
Aug 10, 2017·Optics Express·Chang LiuMing Jiang
Sep 24, 2016·Optics Express·Christopher HahneMatthias Pesch
Nov 13, 2015·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Edmund Y Lam
Feb 12, 2014·Optics Express·Tomoya NakamuraJun Tanida
Oct 31, 2020·Reports on Progress in Physics·Jinyang Liang
Apr 7, 2021·Optics Express·Miguel MarquezEsteban Vera
Apr 25, 2021·Nature Communications·Dehui ZhangTheodore B Norris

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