Abstract

Analog spatial-filtering techniques are applied to the restoration of images degraded by propagation through random media. The image-forming system is assumed to be linear and stationary so that optically dividing the degraded image spectrum by the degrading transfer function suppresses the degradation. Images are stored and filters fabricated by controlled photographic methods. Preliminary experimental results have successfully demonstrated the feasibility of this filtering technique. In particular, degradations produced by cosine fringes and hot turbulent air were suppressed and enhanced images obtained.

© 1967 Optical Society of America

Restoration of Turbulence-Degraded Images*

Benjamin L. McGlamery
J. Opt. Soc. Am. 57(3) 293-297 (1967)

Nonlinearity in Optical Imaging Systems*

Richard J. Becherer and George B. Parrent
J. Opt. Soc. Am. 57(12) 1479-1486 (1967)

Ambiguity of the Transfer Function with Partially Coherent Illumination

Richard E. Swing and James R. Clay
J. Opt. Soc. Am. 57(10) 1180-1189 (1967)

Transfer Function for Cascaded Optical Systems

John B. DeVelis and George B. Parrent
J. Opt. Soc. Am. 57(12) 1486-1490 (1967)

Image Restoration by the Method of Least Squares

Carl W. Helstrom
J. Opt. Soc. Am. 57(3) 297-303 (1967)