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Real-time imaging through strongly scattering media: seeing through turbid media, instantly
Numerous everyday situations like navigation, medical imaging and rescue operations require viewing through optically inhomogeneous media. This is a challenging task as photons propagate predominantly diffusively (rather than ballistically) due to random multiple scattering off the inhomogenieties....
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4844949/ https://www.ncbi.nlm.nih.gov/pubmed/27114106 http://dx.doi.org/10.1038/srep25033 |
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author | Sudarsanam, Sriram Mathew, James Panigrahi, Swapnesh Fade, Julien Alouini, Mehdi Ramachandran, Hema |
author_facet | Sudarsanam, Sriram Mathew, James Panigrahi, Swapnesh Fade, Julien Alouini, Mehdi Ramachandran, Hema |
author_sort | Sudarsanam, Sriram |
collection | PubMed |
description | Numerous everyday situations like navigation, medical imaging and rescue operations require viewing through optically inhomogeneous media. This is a challenging task as photons propagate predominantly diffusively (rather than ballistically) due to random multiple scattering off the inhomogenieties. Real-time imaging with ballistic light under continuous-wave illumination is even more challenging due to the extremely weak signal, necessitating voluminous data-processing. Here 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 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 of the technique, and its implementation with present day low-cost technology promises its utility in a variety of devices in maritime, aerospace, rail and road transport, in medical imaging and defence. It is of equal interest to the common man and adventure sportsperson like hikers, divers, mountaineers, who frequently encounter situations requiring realtime imaging through obscuring media. As a specific example, navigation under poor visibility is examined. |
format | Online Article Text |
id | pubmed-4844949 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-48449492016-04-29 Real-time imaging through strongly scattering media: seeing through turbid media, instantly Sudarsanam, Sriram Mathew, James Panigrahi, Swapnesh Fade, Julien Alouini, Mehdi Ramachandran, Hema Sci Rep Article Numerous everyday situations like navigation, medical imaging and rescue operations require viewing through optically inhomogeneous media. This is a challenging task as photons propagate predominantly diffusively (rather than ballistically) due to random multiple scattering off the inhomogenieties. Real-time imaging with ballistic light under continuous-wave illumination is even more challenging due to the extremely weak signal, necessitating voluminous data-processing. Here 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 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 of the technique, and its implementation with present day low-cost technology promises its utility in a variety of devices in maritime, aerospace, rail and road transport, in medical imaging and defence. It is of equal interest to the common man and adventure sportsperson like hikers, divers, mountaineers, who frequently encounter situations requiring realtime imaging through obscuring media. As a specific example, navigation under poor visibility is examined. Nature Publishing Group 2016-04-26 /pmc/articles/PMC4844949/ /pubmed/27114106 http://dx.doi.org/10.1038/srep25033 Text en Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Sudarsanam, Sriram Mathew, James Panigrahi, Swapnesh Fade, Julien Alouini, Mehdi Ramachandran, Hema Real-time imaging through strongly scattering media: seeing through turbid media, instantly |
title | Real-time imaging through strongly scattering media: seeing through turbid media, instantly |
title_full | Real-time imaging through strongly scattering media: seeing through turbid media, instantly |
title_fullStr | Real-time imaging through strongly scattering media: seeing through turbid media, instantly |
title_full_unstemmed | Real-time imaging through strongly scattering media: seeing through turbid media, instantly |
title_short | Real-time imaging through strongly scattering media: seeing through turbid media, instantly |
title_sort | real-time imaging through strongly scattering media: seeing through turbid media, instantly |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4844949/ https://www.ncbi.nlm.nih.gov/pubmed/27114106 http://dx.doi.org/10.1038/srep25033 |
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