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RESEARCH PRODUCT

Compressive imaging in scattering media.

subject

description

One challenge that has long held the attention of scientists is that of clearly seeing objects hidden by turbid media, as smoke, fog or biological tissue, which has major implications in fields such as remote sensing or early diagnosis of diseases. Here, we combine structured incoherent illumination and bucket detection for imaging an absorbing object completely embedded in a scattering medium. A sequence of low-intensity microstructured light patterns is launched onto the object, whose image is accurately reconstructed through the light fluctuations measured by a single-pixel detector. Our technique is noninvasive, does not require coherent sources, raster scanning nor time-gated detection and benefits from the compressive sensing strategy. As a proof of concept, we experimentally retrieve the image of a transilluminated target both sandwiched between two holographic diffusers and embedded in a 6mm-thick sample of chicken breast. This work was supported in part from MINECO (grant FIS2013-40666-P), Generalitat Valenciana (grants PROMETEO2012-021 and ISIC 2012/013), and Universitat Jaume I ( P1-1B2012-55). E.I. and F.S. were partially supported by a Generalitat Valenciana research fellowship.