14 May 2010 Motion detection using speckle photography and extended fractional Fourier transform
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Speckle photography explores the possibility of determining the motion like in-plane translation and out-of-plane rotation or tilt of optically rough surface from the speckle shift that takes place at the recording plane. A simple correlation based speckle photographic system has been proposed that implements two simultaneous optical extended fractional Fourier transforms (EFRTs) of different orders using only a single lens and detector to simultaneously detect both the magnitude and direction of translation and tilt by capturing only two frames: one before and another after the object motion. Theoretical analysis and experiment results are presented.
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B. Bhaduri, C. J. Tay, C. Quan, "Motion detection using speckle photography and extended fractional Fourier transform", Proc. SPIE 7718, Optical Micro- and Nanometrology III, 771813 (14 May 2010); doi: 10.1117/12.853632; https://doi.org/10.1117/12.853632

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