• Photonics Research
  • Vol. 3, Issue 1, 19 (2015)
Siyuan Dong1, Pariksheet Nanda1, Kaikai Guo1, Jun Liao1, and and Guoan Zheng1、2、*
Author Affiliations
  • 1Biomedical Engineering, University of Connecticut, Storrs, Connecticut 06269, USA
  • 2Electrical and Computer Engineering, University of Connecticut, Storrs, Connecticut 06269, USA
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    DOI: 10.1364/PRJ.3.000019 Cite this Article Set citation alerts
    Siyuan Dong, Pariksheet Nanda, Kaikai Guo, Jun Liao, and Guoan Zheng. Incoherent Fourier ptychographic photography using structured light[J]. Photonics Research, 2015, 3(1): 19 Copy Citation Text show less

    Abstract

    Controlling photographic illumination in a structured fashion is a common practice in computational photography and image-based rendering. Here we introduce an incoherent photographic imaging approach, termed Fourier ptychographic photography, that uses nonuniform structured light for super-resolution imaging. In this approach, frequency mixing between the object and the structured light shifts the high-frequency object information to the passband of the photographic lens. Therefore, the recorded intensity images contain object information that is beyond the cutoff frequency of the collection optics. Based on multiple images acquired under different structured light patterns, we used the Fourier ptychographic algorithm to recover the super-resolution object image and the unknown illumination pattern. We demonstrated the reported approach by imaging various objects, including a resolution target, a quick response code, a dollar bill, an insect, and a color leaf. The reported approach may find applications in photographic imaging settings, remote sensing, and imaging radar. It may also provide new insights for high-resolution imaging by shifting the focus from the collection optics to the generation of structured light.
    F(Itn)updated=F(Itn)+OTF·(F(In)OTF·F(Itn)),(1)

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    Iobjupdated=Iobj+Pn(max(Pn))2·(ItnupdatedIobj·Pn).(2)

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    Punknownupdated=Punknown+Iobj(max(Iobj))2·(ItnupdatedIobj·Punknown(xxn)),(3)

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    Siyuan Dong, Pariksheet Nanda, Kaikai Guo, Jun Liao, and Guoan Zheng. Incoherent Fourier ptychographic photography using structured light[J]. Photonics Research, 2015, 3(1): 19
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