title: Image estimation using doubly stochastic gaussian random field models.
abstract: The two-dimensional (2-D) doubly stochastic Gaussian (DSG) model was introduced by one of the authors to provide a complete model for spatial filters which adapt to the local structure in an image signal. Here we present the optimal estimator and 2-D fixed-lag smoother for this DSG model extending earlier work of Ackerson and Fu. As the optimal estimator has an exponentially growing state space, we investigate suboptimal estimators using both a tree and a decision-directed method. Experimental results are presented.
authors.affiliation: Department of Electrical, Computer, and Systems Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180.
authors.forename: J W
authors.initials: JW
authors.lastname: Woods
authors.forename: S
authors.initials: S
authors.lastname: Dravida
authors.forename: R
authors.initials: R
authors.lastname: Mediavilla