16 December 1992 Optical processing of images from a military environment
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Proceedings Volume 1622, Emerging Optoelectronic Technologies; (1992) https://doi.org/10.1117/12.637029
Event: Emerging OE Technologies, Bangalore, India, 1991, Bangalore, India
Several pure optical processing methods have been investigated in order to improve the quality of images from a military environment. Two methods proved unsuitable from the military viewpoint: the well know Vander Lugt matched filter and the classical spatial filtering by a 4f system with coherent illumination. On the other hand two other methods gave encouraging results : pseudocolour encoding of spatial frequencies and cryptography by means of a double aberrating medium. I.
© (1992) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Emile J. Schweicher, Emile J. Schweicher, Frank Dubois, Frank Dubois, } "Optical processing of images from a military environment", Proc. SPIE 1622, Emerging Optoelectronic Technologies, (16 December 1992); doi: 10.1117/12.637029; https://doi.org/10.1117/12.637029

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