Bernal S D_2010.pdf - University of Plymouth

5.2. FEEDBACK-MEDIATEDILLVSORY CONTOUR COMPLETION
BeI{Cl)
«(si) , i
Bel(Sl)
Input
image
/"\ "(SI ,^2_ ,_,„_ y_27)
111^
/-\ «^/(Slb=2..„7o,y-n)
I
SHDO
/ \^ •^ (S1|,.2.i=70,y-17)
f I
I I
ill!
HQDQ
Fi^wrf 5. /A,- SI model response to a Kani^.sa square input image with feedback arising from
Ihe CI layer containing a square representation. Tlie 2D SI maps represent the
prohahility value for the horizontal state across all locations of scale band 2. Arrows
inditaie feedforward (green) and fcedhack (red) pri>paga!ion of evidence.
The probability dislrihutiuns of an SI node in ihe illusory contour region are
shown on the left, illustrating how the bollom-up evidence, ^(SI), and top-down
information from the CI layer, ^(LS'I), are combined to fomi the belief, Bel(S\).
2i3