PerspectiveApplied Physics

Ghost Imaging in Three Dimensions

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Science  17 May 2013:
Vol. 340, Issue 6134, pp. 821-822
DOI: 10.1126/science.1238415

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Images are usually captured with a two-dimensional (2D) "device"—the retina, a piece of film, or a detector array—and extra processing is needed to create an image that we perceive as 3D. On page 844 of this issue, Sun et al. (1) demonstrate how to create 3D images of an object by capturing light with little more than a few single-pixel detectors. The detectors have only one pixel and cannot possibly reconstruct even a 2D image on their own. Yet, by properly illuminating the scene and using so-called "computational ghost imaging" techniques, the authors can render beautiful 3D images.