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

Question

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 _____.

• A. Topological distortion
• B. Vanishing point
• C. View confusion
• D. Perspective foreshortening

Answer 1

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/