Abstract

A generalized analysis of spatial filtering of object transparencies modulated by (TV) raster lines has been developed from which various particular cases and also the limits and approximations of the processes appear naturally. It can be seen that the positive–negative reversal of the filtered image depends upon the nature of the modulating lines (opaque or clear) and also on the order of the Fourier spectrum that forms the image. The same analysis (one dimensional) can also explain, in principle, the behavior of the filtered images from half-tone transparencies. The experimental results reported support the analysis.

© 1975 Optical Society of America

Multicolor Imagery from Holograms by Spatial Filtering

C. S. Ih
Appl. Opt. 14(2) 438-444 (1975)

Nonlinear filtering in coherent optical systems through halftone screen processes

Hisatoyo Kato and J. W. Goodman
Appl. Opt. 14(8) 1813-1824 (1975)

Enhancement of multiple images by sampling spatial filtering using additional auxiliary sampling

A. Kalestyński
J. Opt. Soc. Am. 65(12) 1443-1447 (1975)

Speckle Reduction in Holography with a Spatially Incoherent Source

Makoto Kato, Yoshikazu Nakayama, and Tatsuro Suzuki
Appl. Opt. 14(5) 1093-1099 (1975)

Optical Interpolation with Application to Array Processing

E. B. Felstead and A. U. Tenne-Sens
Appl. Opt. 14(2) 363-368 (1975)