Generalizing biological surround suppression based on center surround similarity via deep neural network models
Fig 2
Grating orientation tuning of the CNN neurons.
A. Stimuli used in the experiments: rotating the center (left, black); rotating the surround (middle, purple); fixing the center at the optimal orientation and rotating the surround (right, cyan). B. Neurophysiology V1 data of the three types of orientation tuning curves (reproduced from [17]). The most suppressive surround orientation matches the optimal center orientation. The surround stimuli alone hardly elicit responses. 0° represents the optimal orientation (same for the following plots). C. Example orientation tuning curves of CNN neurons. D. Averaged orientation tuning curves in CNN layers. Shaded area indicates s.e.m.