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Fig. 14.8. LISSOM activity patterns. As in Figure 14.7, column (a) shows the normalized input; the LISSOM map activity before and after lateral interaction is shown in columns (b) and (c). The initial responses are sparser than in SOM, although the responses for different digits still overlap significantly. Settling through the lateral connections removes much of the redundant activation and focuses the response around the typical active regions for each digit. After settling, the patterns for the same digit have more overlap, and those for different digits less overlap than before settling, making the digits easier to recognize.