Primary Visual Cortex as a Saliency Map: A Parameter-Free Prediction and Its Test by Behavioral Data
Fig 4
Schematics of the seven kinds of feature singleton scenes.
Each bar is colored green or purple (of the same luminance in the behavioral experiment), tilted to the left or right from vertical by the same absolute tilt angle, moving to the left or right (indicated by an arrow pointing to left or right) by the same motion speed. Under each schematic, the non-trivial neural responses (e.g., these responses are expected to be substantially higher than the responses to the background bars) evoked by the singleton are listed. Each singleton scene here is called a purple scene (in this paper) to denote that the color of the background bars are purple. Swapping between the green and purple colors changes a purple scene into a green scene. All purple scenes are assumed to share an invariant background response distribution, so are all the green scenes. The behavioral experiment [29] randomly interleaved purple and green scenes between trials.