Poster ID # W48

SVCL

The discriminant center-surround hypothesis for bottom-up saliency
Dashan Gao Vijay Mahadevan Nuno Vasconcelos
Department of Electrical and Computer Engineering, University of California San Diego

· Center-surround saliency decision-theoretic sense

is

optimal

in

a

Biologically Plausible Implementation (standard neural architecture of V1)
surround

­ Salient locations: the discrimination between center and surround with minimum probability of error ­ Exploiting natural image statistics for computational parsimony
P(x|y=center) Wl0 Wl
1

simple cell (differential)

P(x|y=surround)

l

x

center

complex cell

cortical columns

Consistency with Psychophysics
Single/conjunctive feature Visual search asymmetries

Predicting human eye fixations
Discriminant Human

Motion saliency
Moving background

Dynamic background Nonlinearity (orientation contrast)
3 2.5 2

Saliency

1.5 1

Human (Nothdurft, 1993)

0.5 0

Discriminant saliency
5 10 20

Orientation contrast (deg)

30

40

50

60

70

80

90