Study of a dual mode SWIR active imaging system for direct imaging and non-line-of-sight vision

2015 ◽  
Author(s):  
Martin Laurenzis ◽  
Frank Christnacher ◽  
Andreas Velten
Keyword(s):  
Imaging System ◽  
Line Of Sight ◽  
Direct Imaging ◽  
Dual Mode ◽  
Active Imaging ◽  
Non Line Of Sight

Synthetic Wavelength Holography: Snapshot Non-Line-of-Sight Imaging with High-Resolution and Wide Field of View

2020 ◽  
Author(s):  
Florian Willomitzer ◽  
Prasanna Rangarajan ◽  
Fengqiang Li ◽  
Muralidhar Balaji ◽  
Marc Christensen ◽  
...  
Keyword(s):  
High Resolution ◽  
Imaging System ◽  
Scattered Light ◽  
Field Of View ◽  
Line Of Sight ◽  
Wide Field ◽  
Navigation Systems ◽  
Small Probe ◽  
Wide Field Of View ◽  
Non Line Of Sight

Abstract The presence of a scattering medium in the imaging path between an object and an observer is known to severely limit the visual acuity of the imaging system. We present an approach to circumvent the deleterious effects of scattering, by exploiting spectral correlations in scattered wavefronts. Our Synthetic Wavelength Holography (SWH) method is able to recover a holographic representation of hidden targets with high resolution over a wide field of view. The complete object field is recorded in a snapshot-fashion, by monitoring the scattered light return in a small probe area. This unique combination of attributes opens up a plethora of new Non-Line-of-Sight imaging applications ranging from medical imaging and forensics, to early-warning navigation systems and reconnaissance. Adapting the findings of this work to other wave phenomena will help unlock a wider gamut of applications beyond those envisioned in this paper.

scholarly journals Exploiting Occlusion in Non-Line-of-Sight Active Imaging

2018 ◽  
Vol 4 (3) ◽  
pp. 419-431 ◽  
Author(s):  
Christos Thrampoulidis ◽  
Gal Shulkind ◽  
Feihu Xu ◽  
William T. Freeman ◽  
Jeffrey H. Shapiro ◽  
...  
Keyword(s):  
Line Of Sight ◽  
Active Imaging ◽  
Non Line Of Sight

scholarly journals Dynamic non-line-of-sight imaging system based on the optimization of point spread functions

2021 ◽  
Author(s):  
chengquan pei ◽  
anke zhang ◽  
Yue Deng ◽  
Feihu Xu ◽  
Jiamin Wu ◽  
...  
Keyword(s):  
Imaging System ◽  
Line Of Sight ◽  
Point Spread Functions ◽  
Point Spread ◽  
Non Line Of Sight

Simulation Research of Non-line-of-sight Imaging System Based on Bidirectional Reflectance Distribution Function

2020 ◽  
Vol 49 (12) ◽  
pp. 157-169
Author(s):  
徐伟豪 Wei-hao XU ◽  
苏秀琴 Xiu-qin SU ◽  
汪书潮 Shu-chao WANG ◽  
朱文华 Wen-hua ZHU ◽  
陈松懋 Song-mao CHEN ◽  
...  
Keyword(s):  
Distribution Function ◽  
Imaging System ◽  
Line Of Sight ◽  
Bidirectional Reflectance Distribution Function ◽  
Bidirectional Reflectance ◽  
Simulation Research ◽  
Bidirectional Reflectance Distribution ◽  
Non Line Of Sight

Simulation Research of Non-line-of-sight Imaging System Based on Bidirectional Reflectance Distribution Function

2020 ◽  
Vol 49 (12) ◽  
pp. 157-169
Author(s):  
徐伟豪 Wei-hao XU ◽  
苏秀琴 Xiu-qin SU ◽  
汪书潮 Shu-chao WANG ◽  
朱文华 Wen-hua ZHU ◽  
陈松懋 Song-mao CHEN ◽  
...  
Keyword(s):  
Distribution Function ◽  
Imaging System ◽  
Line Of Sight ◽  
Bidirectional Reflectance Distribution Function ◽  
Bidirectional Reflectance ◽  
Simulation Research ◽  
Bidirectional Reflectance Distribution ◽  
Non Line Of Sight

scholarly journals Fast non-line-of-sight imaging with high-resolution and wide field of view using synthetic wavelength holography

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Florian Willomitzer ◽  
Prasanna V. Rangarajan ◽  
Fengqiang Li ◽  
Muralidhar M. Balaji ◽  
Marc P. Christensen ◽  
...  
Keyword(s):  
Imaging System ◽  
Scattered Light ◽  
Field Of View ◽  
Line Of Sight ◽  
Wide Field ◽  
Navigation Systems ◽  
Wide Field Of View ◽  
Wave Phenomena ◽  
Angular Field Of View ◽  
Non Line Of Sight

AbstractThe presence of a scattering medium in the imaging path between an object and an observer is known to severely limit the visual acuity of the imaging system. We present an approach to circumvent the deleterious effects of scattering, by exploiting spectral correlations in scattered wavefronts. Our Synthetic Wavelength Holography (SWH) method is able to recover a holographic representation of hidden targets with sub-mm resolution over a nearly hemispheric angular field of view. The complete object field is recorded within 46 ms, by monitoring the scattered light return in a probe area smaller than 6 cm × 6 cm. This unique combination of attributes opens up a plethora of new Non-Line-of-Sight imaging applications ranging from medical imaging and forensics, to early-warning navigation systems and reconnaissance. Adapting the findings of this work to other wave phenomena will help unlock a wider gamut of applications beyond those envisioned in this paper.

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