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Understanding Monocular Depth Cues

Oct 26, 2024

Lecture on Sensation: Monocular Depth Cues

Introduction

  • Focus on monocular depth cues, unlike binocular cues which involve both eyes.
  • Monocular cues can be used even with one eye, like a pirate with an eye patch.

Monocular Depth Cues

  • Interposition (Occlusion):

    • One object blocking another is perceived as being closer.
    • Depth perception is based on the blocking of objects.
  • Relative Size:

    • Objects of a known standard size appear larger when closer.
    • If objects are the same size, the one taking up more retinal space is closer.
    • Example: Cars of the same size, larger ones appear closer.
  • Convergence/Linear Perspective:

    • Parallel lines appear to converge as they move away from the viewer.
    • Example: Railway tracks appearing to meet at a distance.
  • Light and Shadow:

    • Objects in front are well-lit, and objects behind cast shadows.
    • Shadows help determine the position and depth of objects.
    • Example: A shadow indicates a ball is above the ground.
  • Relative Clarity (Texture):

    • Objects with more texture and detail are perceived as closer.
    • Blurry objects appear farther away.
    • Example: Clear can seems closer than a blurry one.

Interesting Fact

  • Pirates might cover one eye to preserve night vision for low-light conditions during attacks.

Conclusion

  • Monocular depth cues are crucial for understanding depth with one eye.
  • Encourage reading on binocular cues for a comprehensive understanding of depth perception.

Questions

  • Students are encouraged to post any questions they have about the lecture.