title: Restoration of degraded images by composite gratings in a coherent optical processor.
abstract: A study has been made on restoration of degraded images utilizing spatial filtering techniques in a coherent optical processor. This study differs from other coherent approaches in that the spatial filters employed contain only composite gratings that are quite simple to produce. A general method of synthesizing the appropriate composite gratings for the linearly smeared as well as multiply exposed and out-offocus images will be presented in some detail with experimental results. The extension of the method of synthesis to other types of degradation will be briefly discussed. in Appendix A.
authors.forename: D P
authors.initials: DP
authors.lastname: Jablonowski
authors.forename: S H
authors.initials: SH
authors.lastname: Lee