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
Full Article | PDF ArticleMore Like This
Hong-Jun Su and Mohammad A. Karim
Appl. Opt. 37(17) 3639-3642 (1998)
Guowen Lu, Zheng Zhang, Shudon Wu, and F. T. S. Yu
Appl. Opt. 36(2) 470-483 (1997)
Shuqun Zhang and Mohammad A. Karim
Appl. Opt. 38(11) 2182-2188 (1999)