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Mastering Depth Perception: Techniques and Illusions Demystified

Explore the fascinating world of depth perception through monocular and binocular cues, relative size, interposition, and more. Learn how visual illusions like the Phi Phenomenon challenge our perceptions. Understand the impact of cultural experiences on the Muller-Lyer Illusion and sensory restrictions on perception. Unravel the mysteries of perceptual constancy, brightness contrast, and grouping principles.

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Mastering Depth Perception: Techniques and Illusions Demystified

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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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