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Photonics 2018, 5(3), 18; https://doi.org/10.3390/photonics5030018

Considerations and Framework for Foveated Imaging Systems

1
Department of Electrical Engineering, The Pennsylvania State University, University Park, PA 16802, USA
2
US Army Armament Research, Development and Engineering Center, Picatinny Arsenal, NJ 07086, USA
This work was presented partially at Long, A.D.; Narayanan, R.M.; Kane, T.J.; Rice, T.F.; Tauber, M.J. Analysis and implementation of the foveated vision of the raptor eye. In Proceedings of the SPIE Conference on Image Sensing Technologies: Materials, Devices, Systems, and Applications III, Baltimore, MD, USA, 20–21 April 2016; pp. 98540T-1–98540T-9, and Long, A.D.; Narayanan, R.M.; Kane, T.J.; Rice, T.F.; Tauber, M.J. Foveal scale space generation with the log-polar transform. In Proceedings of the SPIE Conference on Image Sensing Technologies: Materials, Devices, Systems, and Applications IV, Anaheim, CA, USA, 12–13 April 2017; pp. 1020910-1–1020910-8.
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Received: 7 March 2018 / Revised: 25 June 2018 / Accepted: 12 July 2018 / Published: 19 July 2018
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Abstract

Foveated sight as observed in some raptor eyes is a motivation for artificial imaging systems requiring both wide fields of view as well as specific embedded regions of higher resolution. These foveated optical imaging systems are applicable to many acquisition and tracking tasks and as such are often required to be relatively portable and operate in real-time. Two approaches to achieve foveation have been explored in the past: optical system design and back-end data processing. In this paper, these previous works are compiled and used to build a framework for analyzing and designing practical foveated imaging systems. While each approach (physical control of optical distortion within the lens design process, and post-processing image re-sampling) has its own pros and cons, it is concluded that a combination of both techniques will further spur the development of more versatile, flexible, and adaptable foveated imaging systems in the future. View Full-Text
Keywords: scale space; receptive fields; log polar; foveation; computer vision; raptor eye; wide angle; local magnification; distortion control scale space; receptive fields; log polar; foveation; computer vision; raptor eye; wide angle; local magnification; distortion control
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Narayanan, R.M.; Kane, T.J.; Rice, T.F.; Tauber, M.J. Considerations and Framework for Foveated Imaging Systems . Photonics 2018, 5, 18.

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