Generalizing biological surround suppression based on center surround similarity via deep neural network models
Fig 4
Surround suppression tuning when the center is not at the optimal orientation.
A. Stimuli used in the experiments: the center was either fixed at the optimal orientation or rotated 15°, 30°, 45° off from the optimal orientation. The surround suppression tuning curve was acquired by changing the surround orientation. B. Neurophysiology V1 data of Surround suppression tuning curves, when the center was either optimal or rotated 45° away from the optimal (reproduced from [15]). Arrow indicates the center orientation. The most suppressive surround matched the center orientation. C. First row: example surround suppression tuning curves of CNN neurons. We chose these neurons to show the variety of behavior. Second row: Activation heat map of an extended experiment that used more surround and center orientation combinations. Low activation on the diagonal line indicates that the most suppressive surround orientations can follow the center. D. Averaged surround suppression tuning curves in CNN layers. Shaded area indicates s.e.m.