In this paper we examine the use of projection techniques for image restoration. All the methods are shown to be specific examples of the method of projection onto convex sets (POCS). The projection techniques that commonly project only onto linear subspaces are generalized to include projections onto nonlinear subspaces. A new technique based on POCS is described and shown to yield better restoration results than the other projection techniques.
C. I. Podilchuk,
R. J. Mammone,
"A Comparison Of Projection Techniques For Image Restoration", Proc. SPIE 1075, Digital Image Processing Applications, (5 April 1989); doi: 10.1117/12.952658; https://doi.org/10.1117/12.952658