2-4-S_P-Hearing - Sensation & Perception: Hearing...

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1 Sensation & Perception: Hearing Vision III Depth Perception The Problem of Depth Perception • The world is three-dimensional, but the proximal stimulus (retinal image) is two-dimensional • An infinite number of distal stimuli could result in the same retinal image
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2 Binocular Disparity Binocular disparity can provide information regarding depth relationships in the environment – Each eye has a slightly different view of the world – Differences between the images of the two eyes can be used to calculate depth • This cue is only useful at relatively close ranges Convergence Accommodation As things become closer the eye muscles cause the eyes to converge inward (cross) Knowledge of this convergence serves as a depth cue Close range! Oculomotor Cues Convergence Accommodation Far Vision Close Vision Knowledge of the curvature of the lens serves as a cue for distance Flatter Lens = Farther More Curvature = Closer Close Range Cue! Oculomotor Cues
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Occlusion Linear Perspective Texture Gradient Relative Size Height in Plane Light and Shadow Pictorial Cues If one object occludes (covers) another object, then it is closer Pictorial Cues Occlusion Linear Perspective Texture Gradient Relative Size Height in Plane Light and Shadow The farther away something is, the smaller its retinal image Stimuli converge to a single point on the horizon Pictorial Cues Occlusion Linear Perspective Texture Gradient Relative Size Height in Plane
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2-4-S_P-Hearing - Sensation & Perception: Hearing...

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