Bernal S D_2010.pdf - University of Plymouth

5.2. FEEDBACK MEDIATED ILLUSORY CONTOVK COMPLETION
,i(Cl)
BDDD
Bel(S2)
Input
image
BDDD
Figure 5.19: SI and CI model responses to a Kani/sa square input image with feedhack arising
from Ihe S2 layer containing a square represenlaiion. The 2D Si and CI
maps represent Ihe probability value for the horizonial state across all locations
of scale band 2 and 1, respectively. The S2 representation corresponds to the
CI rcconsiruciion using die CI features of the maximum S2 prototypes at each
location, as described in Section 5.1. For each layer, ihe temporal evolution of
the response from time t=l to 1-4 is shown, except for X{S]) and 7t(C]) whose
response is fixed over time. Arrows indicate fcedforw;ird (green) and feedback
(red| priipagalion of evidence. The probability distributions of an SI node in the
illusory contour region at 1-1 undt-4 are shown at the botiom of die figure, illus-
Irating how the recurrent interuuiion between feedforward and feedback leads to
an increase of ihe horizontal orientation belief.
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