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Image processing, Analysis, and Machine Vision

Milan Sonka, Václav Hlavác, Roger Boyle

Chapter 12

Use of 3D Vision - all with Video Answers

Educators

Chapter Questions

Problem 1

For each of the following shape from $X$ techniques, briefly describe the principle underlying it, explain how they can be of practical use, and give some examples.
$\bullet$ Motion
$\bullet$ Texture
$\bullet$ Focus
$\bullet$ Vergence
$\bullet$ Contour

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02:30

Problem 2

Give a counter-example in which apparent motion measured by an optical flow fiek does not correspond to actual motion of the 3D points. [Hint: Consider an opaque sphere, where (1) the sphere does not move and illumination changes; (2) the sphere rotates and the illumination is constant.]

Manish Jain
Manish Jain
Numerade Educator
01:28

Problem 3

Fashion designers cheat the human ability to derive shape from texture. How do they do it?

Chitra Gondi
Chitra Gondi
Numerade Educator

Problem 4

Give an example of a rim which is not a planar curve.

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01:23

Problem 5

Are there line drawings that do not correspond to physically plausible polyhedral objects? If yes, show an example.

Kerry Thornton-Genova
Kerry Thornton-Genova
Numerade Educator

Problem 6

What was the contribution of image interpretation via line labeling to computer vision? Where else can it be used and why?

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Problem 7

Describe how to create a full 3D model of an object from range images taken from different views.

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Problem 8

Outline how a reconstruction of a $3 D$ scene from unorganized set of $2 \mathrm{D}$ views may be acquired. What steps are needed?

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