Addendum to "Smoothing Algorithms for Two-Dimensional Image Processing"
Tohru Katayama, Michitaka Kosaka · IEEE Transactions on Systems Man and Cybernetics · 1978
It should be noted that the state-space model used in the above correspondence is not a Markov model for homogeneous image fields and that the algorithms derived are not optimal in any sense. Therefore, the algorithms should be understood as "suboptimal."