2015/11/11 by Sriram Sudarsanam, Sudarsanam, Sriram, James Mathew +9
Engineering · Physics and Astronomy · #Advanced Optical Imaging Technologies #Advanced Optical Sensing Technologies #Atmospheric and Oceanic Physics (physics.ao-ph) #FOS: Physical sciences #Medical Physics (physics.med-ph) #Optics (physics.optics) #Random lasers and scattering media #physics.ao-ph #physics.med-ph #physics.optics
paper · pdf · doi:10.48550/arxiv.1511.03390
16 pages, 9 figures
arxiv created 2015/11/11 · openalex publication_date 2015/11/11 · arxiv updated 2015/11/12 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Numerous everyday situations like navigation, medical imaging and rescue operations require viewing through optically inhomogeneous media. This is a challenging task as photons, instead of traversing ballistically, propagate predominantly diffusively due to random multiple scattering off the inhomogenieties. Imaging \it in real-time with ballistic light under continuous-wave illumination is even more challenging due to the extremely weak signal, necessitating voluminous data-processing. In this paper, we report imaging through strongly scattering media in real-time and at rates several times the critical flicker frequency of the eye, so that motion is perceived as continuous. Two factors contributed to the speedup of \it more than three orders of magnitude over conventional techniques - the use of a simplified algorithm enabling processing of data on the fly, and the utilisation of task and data parallelization capabilities of typical desktop computers. The extreme simplicity and low cost promises great utility of this technique. As an example, navigation under poor visibility is examined.