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UGC NET CSE | August 2016 | Part 3 | Question: 17

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In perspective projection (from 3D to 2D), objects behind the centre of projection are projected upside down and backward onto the view-plane. This is known as _____.

  1. Topological distortion
  2. Vanishing point
  3. View confusion
  4. Perspective foreshortening
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Answer c)

View Confusion: in perspective projection, objects behind the center of projection are projected upside down and backward on the view-plane.

Topological Distortion: A line segment joining a point lying in front of the viewer to a point in back of the viewer is projected to a broken line of infinite extent.

Perspective shortening: Size of object varies inversely with the distance from the center of projection.

Vanishing point: Points where set of parallel lines(not parallel to view plane) appear to meet.

Reference: http://slideplayer.com/slide/3916031/

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