Surface-Related Features Figure 11. Recurrent processing of illusory contours. A Kanizsa figure is used as input for the model. V2 bipole cell activities and T-/L-junction signals are illustrated initially (no recurrent processing), after one recurrent cycle and after 3 recurrent cycles. The combined feature map show individual likelihoods colour coded. Local maxima of the feature map are used to detect junction positions. Illusory contours are signalled by V2 bipole cell activities and are completed over time. Note, that as a result of the completion process of illusory contours, L-junctions signals turn into T- junction signals over time. doi:10.1371/journal.pone.0005909.g011 PLoS ONE | www.plosone.org 13 June 2009 | Volume 4 | Issue 6 | e5909