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Perceptual Organization: Depth Perception

Perceptual Organization: Depth Perception. Depth Perception ability to see objects in three dimensions allows us to judge distance. Visual Cliff. Depth Perception. Binocular cues – depend on use of two eyes retinal disparity images from the two eyes differ

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Perceptual Organization: Depth Perception

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  1. Perceptual Organization: Depth Perception • Depth Perception • ability to see objects in three dimensions • allows us to judge distance Visual Cliff

  2. Depth Perception • Binocular cues – depend on use of two eyes • retinal disparity • images from the two eyes differ • closer the object, the larger the disparity • Finger sausage example • convergence • neuromuscular cue • two eyes move inward for near objects

  3. Perceptual Organization: Depth Perception • Monocular Cues – depth cues available to either eye alone • relative size • smaller image is more distant • interposition • closer object blocks distant object • relative clarity • hazy object seen as more distant • texture coarse --> close fine --> distant

  4. Perceptual Organization: Depth Perception Relative Size

  5. Relative Size

  6. Relative Size

  7. Perceptual Organization: Depth Perception Interposition

  8. Perceptual Organization: Depth Perception • Monocular Cues (cont.) • relative height • higher objects seen as more distant • relative motion • closer objects seem to move faster • linear perspective • parallel lines converge with distance • relative brightness • closer objects appear brighter

  9. Perceptual Organization: Depth Perception Relative Height

  10. Perceptual Organization: Depth Perception Perspective Techniques

  11. Perceptual Organization: Depth Perception Light and Shadow

  12. In or out?

  13. Perceptual Organization: Depth Perception Illusory Depth

  14. Perceptual Organization: Depth Perception

  15. Phi Phenomenon – illusion of movement created when two or more adjacent lights blink on and off in quick succession • How do movies work?

  16. Perceptual Constancy • Perceptual Constancy • perceiving objects as unchanging even as illumination and retinal image change • color • shape • size

  17. Perceptual Organization

  18. Perceptual Organization: Depth Perception Illusory Depth Explanation

  19. Perceptual Organization: Muller-Lyer Illusion Cultural Experiences affects susceptibility to the Muller-Lyer illusion!

  20. Perceptual Organization: Size-Distance Relationship

  21. Perceptual Organization-Brightness Contrast

  22. Perceptual Organization-Brightness Contrast

  23. Perceptual Organization: Grouping Principles • Impossible doghouse

  24. Sensory Restriction:Blakemore & Cooper, 1970 • Kittens raised without exposure to horizontal lines later had difficulty perceiving horizontal bars.

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