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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 2 — Jan. 16, 2012
  • pp: 918–933

An upper-bound metric for characterizing spectral and spatial coregistration errors in spectral imaging

Torbjørn Skauli  »View Author Affiliations


Optics Express, Vol. 20, Issue 2, pp. 918-933 (2012)
http://dx.doi.org/10.1364/OE.20.000918


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Abstract

Coregistration errors in multi- and hyperspectral imaging sensors arise when the spatial sensitivity pattern differs between bands or when the spectral response varies across the field of view, potentially leading to large errors in the recorded image data. In imaging spectrometers, spectral and spatial offset errors are customarily specified as “smile” and “keystone” distortions. However these characteristics do not account for errors resulting from variations in point spread function shape or spectral bandwidth. This paper proposes improved metrics for coregistration error both in the spatial and spectral dimensions. The metrics are essentially the integrated difference between point spread functions. It is shown that these metrics correspond to an upper bound on the error in image data. The metrics enable estimation of actual data errors for a given image, and can be used as part of the merit function in optical design optimization, as well as for benchmarking of spectral image sensors.

© 2012 OSA

OCIS Codes
(040.1490) Detectors : Cameras
(110.3000) Imaging systems : Image quality assessment
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors
(120.4800) Instrumentation, measurement, and metrology : Optical standards and testing
(100.4145) Image processing : Motion, hyperspectral image processing
(110.4234) Imaging systems : Multispectral and hyperspectral imaging

ToC Category:
Imaging Systems

History
Original Manuscript: October 24, 2011
Revised Manuscript: December 9, 2011
Manuscript Accepted: December 12, 2011
Published: January 4, 2012

Citation
Torbjørn Skauli, "An upper-bound metric for characterizing spectral and spatial coregistration errors in spectral imaging," Opt. Express 20, 918-933 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-2-918


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