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Fig. 4. Segmentation maps of the grayscale image with different estimates of marginals and different number of subchains (S): pair "image IM–map MP" simulated for ({lambda}1,{lambda}2) = (0.17, 1.20): (a) grayscale image, (b) true map; estimates based on sample frequencies: (c) S = 1, (d) S = 4, (e) S = 9; estimates based on averaging of transition probabilities: (f) S = 1, (g) S = 4; (h) S = 9.