Abstract

A partially coherent imaging system distorts images nonlinearly. We investigate the restoration of such images by use of a second-degree nonlinear filter which is optimum for low-contrast images. The performance of this filter is shown to be better than that of a linear inverse filter, especially as the imaging becomes more coherent.

© 1981 Optical Society of America

Wiener restoration of defocused partially coherent images

Bahaa E. A. Saleh
Appl. Opt. 19(21) 3646-3650 (1980)

Linear restoration of bilinearly distorted images

Bahaa E. A. Saleh and Wayne C. Goeke
J. Opt. Soc. Am. 70(5) 506-515 (1980)

Restoration of bilinearly distorted images. 3: Constrained least-squares method

M. Rabbani and B. E. A. Saleh
Appl. Opt. 22(22) 3549-3554 (1983)

Pre-inverse filtering of distorted images

Bahaa E. A. Saleh and Nikola S. Subotic
Appl. Opt. 20(22) 3912-3916 (1981)

Restoration of bilinearly distorted images: I. finite impulse response linear digital filtering

Bahaa E. A. Saleh and Madjid Rabbani
J. Opt. Soc. Am. 73(1) 66-70 (1983)