par Schweicher, Emile;Dubois, Frank 
Référence Proceedings of SPIE - The International Society for Optical Engineering, 1622, page (295-299)
Publication Publié, 1991
Référence Proceedings of SPIE - The International Society for Optical Engineering, 1622, page (295-299)
Publication Publié, 1991
Article révisé par les pairs
| Résumé : | 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. |
