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GTU Electronics and Communication Engineering (Semester 8)
Fundamentals of Image Processing
May 2015
Fundamentals of Image Processing
May 2015
1 (a) (i)
Contrast between dynamic range and contrast.
2 M
1 (a) (ii)
Differentiate between spatial resolution and intensity
Resolution.
2 M
1 (a) (iii)
Explain in brief the sampling checkerboards and the false contouring effects.
3 M
1 (b) (i)
Compare various methods of image interpolation.
3 M
1 (b) (ii)
Differentiate between image enhancement and image Restoration.
2 M
1 (b) (iii)
Make comparison between point processing and neighborhood processing techniques.
2 M
2 (a)
Given histograms (a) and (b), modify the histogram of image (a) as per
the histogram of image (b).
Histogram (a)
Histogram (b)
Histogram (a)
| Gray level | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| No. of Pixels | 790 | 1023 | 850 | 656 | 329 | 245 | 122 | 81 |
Histogram (b)
| Gray level | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| No. of Pixels | 0 | 0 | 0 | 614 | 819 | 1230 | 819 | 614 |
7 M
2 (b)
Consider that the digital image is corrupted by following noises
individually: 1. Salt & pepper noise, 2. Salt noise only, 3. Pepper
noise only. Suggest & explain the best suitable spatial filtering
methods to remove the noise from the image in each case.
7 M
2 (c) (i)
What is gamma correction? What is its importance?
histograms. Suppose we form a third image I3 as I3=I1 - I2.
Will this image I3 be a zero image? Give reason for your
Answer.
3 M
2 (c) (ii)
What is mean and standard deviation of the histogram? What are the physical significance of these quantities?
2 M
2 (c) (iii)
There are two images I1 and I2. They have identical histograms. Suppose we form a third image I3 as I3=I1-I2. Will this image I3 be a zero image Give reason for your answer
3 M
3 (a)
Write a detailed note on image pyramids and sub-band coding.
7 M
3 (b)
Discuss frequency domain formulations of the Laplacian, Unsharp
masking, Highboost filtering, and High-frequency-emphasis filtering
with applications.
7 M
3 (c)
Write a detailed note on 2-D fast wavelet transform.
7 M
3 (d) (i)
Explain the ringing property of ILPFs using the convolution
theorem.
3 M
3 (d) (ii)
Discuss CMY color model. Why CMYK color model is required?
4 M
4 (a) (i)
Differentiate between radiance and luminance using one example.
2 M
4 (a) (ii)
Write a short note on all-system-safe colors.
5 M
4 (b)
With the following symbols and their probabilities of occurrence,
encode the message "ACBA" using the arithmetic coding algorithm.
| Symbol | A | B | C |
| Probability | 0.8 | 0.02 | 0.18 |
7 M
4 (c) (i)
Differentiate between noise and degradation.
1 M
4 (c) (ii)
Draw and explain in brief the model of the degradation/restoration process.
4 M
4 (c) (iii)
Discuss in brief spatial and frequency properties of the noise.
2 M
4 (d)
List and exemplify different types of redundancy available in the
digital image.
7 M
5 (a)
Explain the concept of Laplacian and LoG for edge detection and
comment on the comparison of both the operators.
7 M
5 (b) (i)
Prove that dilation and erosion are duals of each other with respect to set complementation and reflection.
3 M
5 (b) (ii)
Write a brief note on inverse filtering. Also discuss the problem with the same.
4 M
5 (c) (i)
What is the advantage of using Sobel operator?
1 M
5 (c) (ii)
Explain the process of edge detection using gradient
Operators.
6 M
5 (d)
List out various basic morphological algorithms and explain any one
in detail.
7 M
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