From Event: SPIE Commercial + Scientific Sensing and Imaging, 2018
The parametrization of light rays in form of light fields (LF) have become the standard and probably the most common way for the representation, analysis and processing of rays emitted from 3D objects or from 3D displays. Essentially, the LFs are 4D maps representing the spatial and angular distribution of the intensity of the rays. Nowadays, with the increasing availability of spectral imagers, the conventional LF can be augmented with the spectral information, yielding to what we call spectral light fields (SLFs). Spectral light fields refer to a 5D distribution of spatial, angular and spectral ray’s distribution. Thus, the SLF can be viewed as spectral radiance over a 2D manifold, or as 5D parameterization of a plenoptic function. In this paper we show the utility of the SLFs for digital 3D reconstruction. We show that the additional spectral domain provides important information that can be utilized to overcome 3D reconstruction artefacts caused by ambiguities in commonly captured LFs. We demonstrate the utilization of the SLFs for profilomety and refocusing.
Vladimir Farber, Yaniv Oiknine, Isaac August, and Adrian Stern, "3D reconstructions from spectral light fields," Proc. SPIE 10666, Three-Dimensional Imaging, Visualization, and Display 2018, 106660W (Presented at SPIE Commercial + Scientific Sensing and Imaging: April 17, 2018; Published: 16 May 2018); https://doi.org/10.1117/12.2306139.
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