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Fig. 13.1. Demonstration of contour integration. Look briefly at the circular area fill with line segments above; a continuous contour from top left to the right and slightly down should immediately emerge. This process is called contour integration: A good continuation of contour elements leads to a vivid perception of a single object. This function is believed to arise automatically in the orientation map of V1, mediated by lateral connections (Section 13.1.1).