1 February 1996 All-optical invariant target recognition based on intensity-to-phase coding
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We have experimentally demonstrated the feasibility of a scale, rotation, and translation invariant all-optical processor for automatic target recognition. This simple processor consists of a single Fourier lens and uses a phase-coded input image of the target obtained by the recording of the original image onto a phase-only material through a Ronchi-type grating. A logarithmic distance measure is introduced to separate two classes of targets under the experiment. A real-time implementation of the processor is suggested utilizing a specially designed spatial light modulator.
Lev S. Sadovnik, Lev S. Sadovnik, Alexander Rizkin, Alexander Rizkin, Oleg Rashkovskiy, Oleg Rashkovskiy, Alexander A. Sawchuk, Alexander A. Sawchuk, } "All-optical invariant target recognition based on intensity-to-phase coding," Optical Engineering 35(2), (1 February 1996). https://doi.org/10.1117/1.600899 . Submission:

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