Self-Organizing Maps and Their Applications in Image Processing, Information Organization, and Retrieval - Nonlinear Signal and Image Processing: Theory, Methods and Applications - page 395

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FIGURE 11.3
(a) Topology of the self-organizing feature map. (b) Shrinking square and hexagonal topological
neighborhoods around the winner neuron, which is marked by a black circle, for n 1 < n 2 < n 3 .