Table 1.

Parameters involved in our model.

Parameter	Description	Equation	Setting
${\alpha }_L,{\alpha }_a,{\alpha }_b$	Low-level: Relative contribution of each color channel	(6)	1,0.5,1
δ	Mid-level: Sensitivity of connection probability with contrast	(9)	1/16
${\beta }_{{\sigma }_0},{\beta }_{{\sigma }_1},{\beta }_{{\sigma }_2}$	Scales: Relative contribution of each scale	(12)	1,1,0.5