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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 4 — Feb. 1, 2012
  • pp: A67–A79

Space–time compressive imaging

Vicha Treeaporn, Amit Ashok, and Mark A. Neifeld  »View Author Affiliations


Applied Optics, Vol. 51, Issue 4, pp. A67-A79 (2012)
http://dx.doi.org/10.1364/AO.51.000A67


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Abstract

Compressive imaging systems typically exploit the spatial correlation of the scene to facilitate a lower dimensional measurement relative to a conventional imaging system. In natural time-varying scenes there is a high degree of temporal correlation that may also be exploited to further reduce the number of measurements. In this work we analyze space–time compressive imaging using Karhunen–Loève (KL) projections for the read-noise-limited measurement case. Based on a comprehensive simulation study, we show that a KL-based space–time compressive imager offers higher compression relative to space-only compressive imaging. For a relative noise strength of 10% and reconstruction error of 10%, we find that space–time compressive imaging with 8×8×16 spatiotemporal blocks yields about 292× compression compared to a conventional imager, while space-only compressive imaging provides only 32× compression. Additionally, under high read-noise conditions, a space–time compressive imaging system yields lower reconstruction error than a conventional imaging system due to the multiplexing advantage. We also discuss three electro-optic space-time compressive imaging architecture classes, including charge-domain processing by a smart focal plane array (FPA). Space–time compressive imaging using a smart FPA provides an alternative method to capture the nonredundant portions of time-varying scenes.

© 2012 Optical Society of America

OCIS Codes
(100.0100) Image processing : Image processing
(100.3010) Image processing : Image reconstruction techniques
(110.0110) Imaging systems : Imaging systems
(110.6980) Imaging systems : Transforms
(110.1758) Imaging systems : Computational imaging

History
Original Manuscript: October 12, 2011
Manuscript Accepted: December 16, 2011
Published: January 31, 2012

Citation
Vicha Treeaporn, Amit Ashok, and Mark A. Neifeld, "Space–time compressive imaging," Appl. Opt. 51, A67-A79 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-4-A67

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