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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Vol. 20, Iss. 8 — Aug. 1, 2003
  • pp: 1516–1527

Mathematical extrapolation of image spectrum for constraint-set design and set-theoretic superresolution

Supratik Bhattacharjee and Malur K. Sundareshan  »View Author Affiliations


JOSA A, Vol. 20, Issue 8, pp. 1516-1527 (2003)
http://dx.doi.org/10.1364/JOSAA.20.001516


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Abstract

Several powerful iterative algorithms are being developed for the restoration and superresolution of diffraction-limited imagery data by use of diverse mathematical techniques. Notwithstanding the mathematical sophistication of the approaches used in their development and the potential for resolution enhancement possible with their implementation, the spectrum extrapolation that is central to superresolution comes in these algorithms only as a by-product and needs to be checked only after the completion of the processing steps to ensure that an expansion of the image bandwidth has indeed occurred. To overcome this limitation, a new approach of mathematically extrapolating the image spectrum and employing it to design constraint sets for implementing set-theoretic estimation procedures is described. Performance evaluation of a specific projection-onto-convex-sets algorithm by using this approach for the restoration and superresolution of degraded images is outlined. The primary goal of the method presented is to expand the power spectrum of the input image beyond the range of the sensor that captured the image.

© 2003 Optical Society of America

OCIS Codes
(100.2000) Image processing : Digital image processing
(100.2980) Image processing : Image enhancement
(100.3020) Image processing : Image reconstruction-restoration
(100.6640) Image processing : Superresolution

History
Original Manuscript: October 27, 2002
Revised Manuscript: January 30, 2003
Manuscript Accepted: January 30, 2003
Published: August 1, 2003

Citation
Supratik Bhattacharjee and Malur K. Sundareshan, "Mathematical extrapolation of image spectrum for constraint-set design and set-theoretic superresolution," J. Opt. Soc. Am. A 20, 1516-1527 (2003)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-20-8-1516

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