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Image processing, Analysis, and Machine Vision

Milan Sonka, Václav Hlavác, Roger Boyle

Chapter 15

Texture - all with Video Answers

Educators

Chapter Questions

Problem 1

What is a texel?

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Problem 2

Explain the difference between weak and strong textures.

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Problem 3

Explain the difference between fine and coarse textures.

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Problem 4

What is the role of scale in texture description?

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Problem 5

Specify the main texture description and recognition strategies employed in statistical, syntactic, and hybrid methods. For each of the three general approaches, describe the texture types for which the approach can be expected to perform well and for which it is not appropriate.

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02:47

Problem 6

Determine whether the following texture features exhibit relatively higher or lower values in fine textures compared to coarse textures:
(a) Energy in a small-radius circle of the Fourier power spectrum (Figure 15.3a)
(b) Average edge frequency feature (equation 15.10 ) for a small value of $d$
(c) Short primitive emphasis
(d) Long primitive emphasis
(e) Fractal dimension
(f) Lacunarity

Vishal Gupta
Vishal Gupta
Numerade Educator

Problem 7

Name several texture description features that are well suited for characterization of directional textures.

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Problem 8

Explain why deterministic grammars are too restrictive for description of real-world textures.

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01:11

Problem 9

On a rectangular grid, sketch the geometric pattern of an $L B P_{4,4}$ texture description feature detector.

Elif Kucukefe
Elif Kucukefe
Numerade Educator
00:16

Problem 10

What is the main reason for rotational invariance of LBPP, $R$ texture descriptor compared to $\mathrm{LBP}_{p, R}$ ?

Amrita Bhasin
Amrita Bhasin
Numerade Educator

Problem 11

Explain why use of LTPs as opposed to LBPs for texture description compromises gray-level transform invariance.

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Problem 12

Define fractal dimension and lacumarity, explain how these measures can be used for texture description.

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02:45

Problem 13

Define a stochastic grammar. How is it useful for texture description?

Adriano Chikande
Adriano Chikande
Numerade Educator

Problem 14

Explain the rationale for primitive grouping. What are its advantages? To which textures is this approach applicable? How can it be used for texture description?

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Problem 15

Suggest some application areas in which texture description and recognition can be used.

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