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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 52, Iss. 10 — Apr. 1, 2013
  • pp: D12–D21

Higher-order computational model for coded aperture spectral imaging

Henry Arguello, Hoover Rueda, Yuehao Wu, Dennis W. Prather, and Gonzalo R. Arce  »View Author Affiliations


Applied Optics, Vol. 52, Issue 10, pp. D12-D21 (2013)
http://dx.doi.org/10.1364/AO.52.000D12


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Abstract

Coded aperture snapshot spectral imaging systems (CASSI) sense the three-dimensional spatio-spectral information of a scene using a single two-dimensional focal plane array snapshot. The compressive CASSI measurements are often modeled as the summation of coded and shifted versions of the spectral voxels of the underlying scene. This coarse approximation of the analog CASSI sensing phenomena is then compensated by calibration preprocessing prior to signal reconstruction. This paper develops a higher-order precision model for the optical sensing in CASSI that includes a more accurate discretization of the underlying signals, leading to image reconstructions less dependent on calibration. Further, the higher-order model results in improved image quality reconstruction of the underlying scene than that achieved by the traditional model. The proposed higher precision computational model is also more suitable for reconfigurable multiframe CASSI systems where multiple coded apertures are used sequentially to capture the hyperspectral scene. Several simulations and experimental measurements demonstrate the benefits of the discretization model.

© 2013 Optical Society of America

OCIS Codes
(110.0110) Imaging systems : Imaging systems
(170.1630) Medical optics and biotechnology : Coded aperture imaging
(110.1758) Imaging systems : Computational imaging
(110.4155) Imaging systems : Multiframe image processing
(110.4234) Imaging systems : Multispectral and hyperspectral imaging

History
Original Manuscript: November 8, 2012
Revised Manuscript: January 29, 2013
Manuscript Accepted: February 7, 2013
Published: March 14, 2013

Virtual Issues
Vol. 8, Iss. 5 Virtual Journal for Biomedical Optics

Citation
Henry Arguello, Hoover Rueda, Yuehao Wu, Dennis W. Prather, and Gonzalo R. Arce, "Higher-order computational model for coded aperture spectral imaging," Appl. Opt. 52, D12-D21 (2013)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-52-10-D12


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References

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