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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/8048
Title: Air Turbulence Mitigation Techniques for Long-Range Terrestrial Surveillance
Authors: Kumar R.
Purohit M.
Saini D.
Kumar Kaushik, Brajesh
Published in: IETE Technical Review (Institution of Electronics and Telecommunication Engineers, India)
Abstract: Atmospheric turbulence severely reduces the effective range of the visual surveillance due to geometric deformation and contrast degradation. This paper for the first time puts together various methodologies used for mitigating the air turbulence and the challenges associated with them. Historically, atmospheric turbulence was studied for astronomical observations and remote sensing; quite recently, it is revisited for long-range terrestrial (horizontal) surveillance (LRTS). LRTS has a diverse range of applications such as border security, long-distance photography, identification, detection of distant objects, etc. Atmospheric turbulence mitigation is a non-trivial problem due to spatial and temporal fluctuations in the air refractive index. The existing approaches for air turbulence mitigation are lucky imaging, adaptive optics, averaging, deblurring, and image registration-based methods. In long-range imaging systems, image registration-based turbulence mitigation techniques are the most popular, but these methods distort the independent motion existing in the scene. In the recent past, few approaches have been introduced to reduce the effect of air turbulence while preserving the object motion. Usually video stabilization techniques yield blurring of output frames, so deblurring and post-processing are necessary steps for better visualization. © 2017 IETE.
Citation: IETE Technical Review (Institution of Electronics and Telecommunication Engineers, India) (2017), 34(4): 416-430
URI: https://doi.org/10.1080/02564602.2016.1198729
http://repository.iitr.ac.in/handle/123456789/8048
Issue Date: 2017
Publisher: Taylor and Francis Ltd.
Keywords: Air turbulence
Deblurring
Geometric distortion
Moving object
Optical flow
Point Spread function
Registration
Restoration
Surveillance
ISSN: 2564602
Author Scopus IDs: 57211197963
57094628600
57188552379
57021830600
Author Affiliations: Kumar, R., Department of Electronics and Communication Engineering, Indian Institute of Technology-Roorkee, Roorkee, Uttarakhand, India
Purohit, M., Department of Electronics and Communication Engineering, Indian Institute of Technology-Roorkee, Roorkee, Uttarakhand, India
Saini, D., Department of Electronics and Communication Engineering, Indian Institute of Technology-Roorkee, Roorkee, Uttarakhand, India
Kaushik, B.K., Department of Electronics and Communication Engineering, Indian Institute of Technology-Roorkee, Roorkee, Uttarakhand, India
Appears in Collections:Journal Publications [ECE]

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