Abstract

A new approach to spatial frequency analysis is presented that offers the potential of analyzing 2-D distributions at video frame rates. It uses a light panel (or light shutter) whose light intensity distribution (or light transmission distribution) sequentially scans through all possible spatial frequencies in both magnitude and orientation. The spatial frequency spectrum of the transparency (or scene) onto which the panel is imaged can be directly displayed as a TV-type picture at video rates.

© 1980 Optical Society of America

Incoherent optical 1-bit cross-correlators for radio antenna arrays

T. W. Cole
Appl. Opt. 19(13) 2169-2173 (1980)

Spectral analysis of a temporal signal with incoherent optics

T. W. Cole
Appl. Opt. 20(1) 145-148 (1981)

Real-time white light spatial frequency and density pseudocolor encoder

F. T. S. Yu, S. L. Zhuang, T. H. Chao, and M. S. Dymek
Appl. Opt. 19(17) 2986-2990 (1980)

Tunable spatial filtering with a Fabry-Perot etalon

G. Indebetouw
Appl. Opt. 19(5) 761-764 (1980)

Comparative study of optical–digital vs all-digital techniques in textural pattern recognition

R. K. O'Toole and H. Stark
Appl. Opt. 19(15) 2496-2506 (1980)