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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 38, Iss. 26 — Sep. 10, 1999
  • pp: 5556–5559

Phase-shifting joint transform correlation with phase-iterative algorithm: effect of the dynamic range limit

Hong-Jun Su and Mohammad A. Karim  »View Author Affiliations


Applied Optics, Vol. 38, Issue 26, pp. 5556-5559 (1999)
http://dx.doi.org/10.1364/AO.38.005556


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Abstract

With phase-shifting joint transform correlation (PSJTC) one uses multiple phase shifts to recover the phase difference between Fourier transforms of the input and the reference. In PSJTC systems the resulting phase-only function is used instead of the joint transform power spectrum (JTPS). Provided it can be recorded linearly, the JTPS reduces to a modulated sinusoidal fringe, especially when the target image matches the reference image. In practice, the JTPS has a wide dynamic range, and a CCD camera has a nonlinear response. Correspondingly, the recorded JTPS turns out to be different from a perfect sinusoidal fringe. Here we study the dynamic range effects of realizing PSJTC with the phase-iterative algorithm.

© 1999 Optical Society of America

OCIS Codes
(050.5080) Diffraction and gratings : Phase shift
(100.5010) Image processing : Pattern recognition
(110.6980) Imaging systems : Transforms

History
Original Manuscript: March 3, 1999
Revised Manuscript: May 25, 1999
Published: September 10, 1999

Citation
Hong-Jun Su and Mohammad A. Karim, "Phase-shifting joint transform correlation with phase-iterative algorithm: effect of the dynamic range limit," Appl. Opt. 38, 5556-5559 (1999)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-38-26-5556


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