Journal
OPTICS LETTERS
Volume 39, Issue 6, Pages 1705-1708Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.39.001705
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Funding
- NSF [1115680]
- Charles Stark Draper [SC001-744]
- ISN [6927356]
- University of Waikato Doctoral Scholarship
- Charles Stark Draper Laboratory fellowship
- Direct For Computer & Info Scie & Enginr
- Div Of Information & Intelligent Systems [1116452, 1115680] Funding Source: National Science Foundation
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Time-of-flight (ToF) cameras calculate depth maps by reconstructing phase shifts of amplitude-modulated signals. For broad illumination of transparent objects, reflections from multiple scene points can illuminate a given pixel, giving rise to an erroneous depth map. We report here a sparsity-regularized solution that separates K interfering components using multiple modulation frequency measurements. The method maps ToF imaging to the general framework of spectral estimation theory and has applications in improving depth profiles and exploiting multiple scattering. (C) 2014 Optical Society of America
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