TB7 P&C Lecture 2; Depth Perception

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  • Created by: mint75
  • Created on: 18-12-15 11:34

1. How do random dot stereograms show how stereopsis works re; binocular disparity?

  • Disparity and depth precede edge extraction in RDS. Because some dots are shifted laterally with respect to others, these dots in the displaced square do not fall on corresponding points on both eyes --> they have disparity
  • Edge extraction precedes disparity and depth in RDS. Because some dots are shifted laterally with respect to others, these dots in the displaced square do not fall on corresponding points on both eyes --> they have disparity
  • The edges are found, the disparity is calculated and the depth is determined
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2. What is uncrossed disparity?

  • Objects positioned further from the fixation point on the horopter have uncrossed disparity
  • Objects positioned closer than the fixation point on the horopter have uncrossed disparity

3. What is the horopter?

  • Both of these
  • An imaginary curved surface that passes through the fixation point
  • The locus of all points in 3d space that fall on corresponding retinal points

4. How do autostereograms differ from normal stereograms?

  • The picture is varied rather than repeated
  • The picture is repeated rather than varied
  • The two pictures are superimposed rather than adjacent
  • The two pictures are adjacent rather than superimposed

5. What is linear perspective?

  • When items closer to the viewer occlude those further behind
  • When items further away from the individual are larger than those closer
  • When items further away from the individual are smaller than those closer
  • When the texture of the item indicates depth

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