Chap 10 Perceiving Depth and Size

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chap 10: Perceiving Depth and Size 1

chap 10: Perceiving Depth and

Size

Class Psyc 315

Type Lecture

Perceiving Depth Cue approach to depth perception Focuses on information in the retinal image that is correlated with depth in the scene occlusion We learn the connection between the cue and depth the association becomes automatic through repeat exposure Oculomotor cues Oculomotor cues are based on sensing that position of the eyes and muscle tension convergence: inward movement of the eyes when we focus on nearby objects accommodation: the shape of the lens changes when we focus on objects at different distances Monocular Cues Monocular cues come from one eye Pictorial cues: Sources of depth information that comes from 2-D images, such as pictures Occlusion: when one object partially covers another relative height: objects below the horizon that are hight in the field of vision are more distant

chap 10: Perceiving Depth and Size 2

objects above the horizon in the Pictorial Cues Relative Size: when objects are equal size, the closer one will take up more of your visual field perspective convergence: parallel lines appear to come together in the distance familiar size: distance information is base on our knowledge Atmospheric perspective: distance objects are fuzzy and have a blue tint texture gradient: equally spaced elements are more closely packed as distance increases Motion-Produced Cues Motion Parallax: close objects in direction of movement glide rapidly past but objects in the distance appear to move slowly ex: looking gina, objects in front of gina more slowly vs objects behind gina move faster out of gallahgers vision field Deletion and accretion: Objects are covered or uncovered as we move relative to them Covering an object: deletion Uncovering an object is accretion Binocular Depth Information Stereoscopic depth perception Depth perception created by input from both eyes Binocular disparity: difference in images from two eyes difference in images from two eyes The horopter: imaginary sphere that passes through the point of focus objects on the horopter fall on corresponding points on the two retinas retinal disparity

chap 10: Perceiving Depth and Size 1

chap 10: Perceiving Depth and

Size

Class Psyc 315

Type Lecture

Perceiving Depth

Cue approach to depth perception

Focuses on information in the retinal image that is correlated with depth in the

scene

occlusion

We learn the connection between the cue and depth

the association becomes automatic through repeat exposure

Oculomotor cues

Oculomotor cues are based on sensing that position of the eyes and muscle tension

convergence: inward movement of the eyes when we focus on nearby objects

accommodation: the shape of the lens changes when we focus on objects at

different distances

Monocular Cues

Monocular cues come from one eye

Pictorial cues: Sources of depth information that comes from 2-D images, such

as pictures

Occlusion: when one object partially covers another

relative height: objects below the horizon that are hight in the field of vision are

more distant

Chap 10 Perceiving Depth and Size

Sensation And Perception (PSYC 315)

Millersville University of Pennsylvania

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Preview text

chap 10: Perceiving Depth and

Size

Chap 10 Perceiving Depth and Size

Course: Sensation And Perception (PSYC 315)

University: Millersville University of Pennsylvania

Students also viewed

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