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| Fig. 12.1 - Tolerance of feature shifts |
This important property of the neocognitron is ensured by C-cells.
Connection area of one of C-cells is marked in S-plane in figure 12.1. This C-cell is active only if there is an active S-cell in its connection area. It corresponds to presence of correct feature at the certain position in the input layer. When this feature is shifted to another position another S-cell is activated. If the activated S-cell belongs to the marked connection area again our C-cell remains active.
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| Fig. 12.1 - Tolerance of feature shifts |
Receptive field of observed C-cell is marked in the input layer U0. It is obvious that C-cell is activated only if any S-cell detects correct feature in this field.