Image restoration: The removal of spatially invariant degradations

This is a review of techniques for digtal restoration of images. Optical and other analog processors are not discussed. Restoration is considered from the point of view of space-domain as well as of spatial-frequency-domain descriptions of images. Consideration is restricted to degradations arising from noise and spatially invariant blurring. However, many of the space-domain methods apply, with minor modifications, to spatially varying blur as well. Some examples of restoration are included to illustrate the methods discussed. Included also is a section on methods whose potential has not yet been exploited for image restoration.