title: Restoration of partially coherent images by use of a second-degree nonlinear filter.
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.
authors.forename: B E
authors.initials: BE
authors.lastname: Saleh
authors.forename: S I
authors.initials: SI
authors.lastname: Sayegh