Scale-, translation-, and rotation-invariant all-optical processor based on intensity-to-phase coding

Lev S. Sadovnik; Alexander A. Sawchuk; Thomas Taiwei Lu; Andrew A. Kostrzewski

doi:10.1117/12.160299

25 October 1993 Scale-, translation-, and rotation-invariant all-optical processor based on intensity-to-phase coding

Lev S. Sadovnik, Alexander A. Sawchuk, Thomas Taiwei Lu, Andrew A. Kostrzewski

Proceedings Volume 1959, Optical Pattern Recognition IV; (1993) https://doi.org/10.1117/12.160299
Event: Optical Engineering and Photonics in Aerospace Sensing, 1993, Orlando, FL, United States

Abstract

To our knowledge, the proposed concept is the first non-holographic all optical implementation of an invariant processor. Unlike most of the proposed invariance schemes, our processor works with gray level images, not just binary ones. This follows from the intensity transformation formalized in Eq. (6). Not only the shape of the object but also its intensity distribution can be analyzed for object identification. Nonlinear optical processing is the key element of our scheme.

Citation Download Citation

Lev S. Sadovnik, Alexander A. Sawchuk, Thomas Taiwei Lu, and Andrew A. Kostrzewski "Scale-, translation-, and rotation-invariant all-optical processor based on intensity-to-phase coding", Proc. SPIE 1959, Optical Pattern Recognition IV, (25 October 1993); https://doi.org/10.1117/12.160299

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