A method for the restoration of blurred and unfocused images

A simple pseudo-inverse filter which takes into account additive white noise is employed in the deconvolution of blurred and unfocused images. The image restoration process can be performed on a minicomputer; for the complete filtering of a scene represented by a matrix of 256 by 256 points, a computing time of only 4 min 30 sec is required. Examples of the image restoration procedure demonstrate that it can provide satisfactory results in spite of the simple type of filtering used.