PSY-3215 Lecture Notes - Lecture 12: Blood Vessel, Contrast Effect, Contact Lens
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The more active a photoreceptor, the stronger the inhibition to it"s neighbor [lateral inhibition. Example: activated by 100 units, inhibition strength would be 10. Final amount of activation = amount of excitation - inhibition (both from the left and right) Example: initial excitation is 100, inhibition from the left is 10 and inhibition from the right is 10 final activation is 80. Lateral inhibition effect: edges are magnified (points at transition) [lateral inhibition. Lateral inhibition detects transitions and smooths out where there is no difference. Gray squares on a completely white background appear one, smooth color, while gray squares on a transitioning background appear to have a gradient and not so smooth in color. Four black squares on a white background. Point a - between top left and bottom left. Point b - between top right and bottom right. Whiteness is magnified because of lateral inhibition (because it is bordered by two black squares and the difference is being magnified)
