Fig. 4
From: Characterization of contrast-mediated collinear interactions in the human visual system
Results obtained in Experiment 3 with peripheral stimuli. The spatial frequency of the Gabors was 1 CPD. For a target-flankers distance of 3λ, inhibition was observed for all levels of flanker contrast, except for the lowest level, where flanker contrast seemed to have no effect. For a target-flankers distance of 8λ, flanker contrast appeared to have no effect (or produced only weak inhibition). In the figure, Cm represents the contrast of the flankers, while Cth indicates the contrast threshold in the baseline condition (i.e., the threshold for detecting the target stimulus without flankers).
