Bioinspired figure-ground discrimination via visual motion smoothing
Fig 9
Effect of the modulated half-activation voltage on the responses of the units in the Lm module.
(A) Same stimulus as ‘bar’ in Fig 8A. (B) Same data as shown in the panel located in the bottom row and the 1st column of Fig 8B. (C) Stimulus-evoked membrane potentials in Lm (2nd to 7th columns). Only the responses of the centrally located unit in Lm are displayed. By shifting the half-activation voltage θ to less negative values (indicated on the top of each column), the sigmoid function (black curves, 1st column) was shifted to the right (pink and red curves, 1st column). The module names to which the mimicked octopamine modulation process was applied are marked on the top of the 1st column. (D) Same stimulus as ‘bar+bg’ in Fig 8A. (E) Same data as shown in the panel located in the bottom row and the 3rd column of Fig 8B. (F) Same as (C) except that the simulation was performed with the ‘bar+bg’ stimulus in (D). The scale bars in the bottom right corner apply to all the membrane potentials. Except for θ, all parameter values were the same as those used to produce the results shown in Fig 8.