We describe the principle of an optical digital processor for mathematical morphology. The proposed central processing unit is based on binary logic using states of polarization and spatial data shift using geometric optics. The system is shown to be able to perform iterative operations. Two possible optical implementations are then discussed.
Jean-Louis de Bougrenet de la Tocnaye,
"An Optical Processor For Mathematical Morphology", Proc. SPIE 0963, Optical Computing '88, (8 February 1988); doi: 10.1117/12.947949; https://doi.org/10.1117/12.947949