STUPIDSID
Answer any four
1 (a)
Differentiate between spatial and tonal resolutions
5 M
1 (b)
Why is the sum of coefficients of a high pass filter mask zero?
5 M
1 (c)
Compare Huffman coding and arithmetic coding;
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1 (d)
Give 3×3 masks for Laplacian filter, horizontal, vertical, +45° and -45° line detector
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1 (e)
Explain dilation and erosion in brief
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2 (a)
Explain the following enhancement operation and draw the graph of transformation function
i) Clipping ii) Bit plane slicing
i) Clipping ii) Bit plane slicing
10 M
2 (b)
Perform histogram equalization on the following image histogram and plot original and equalized histograms.
| Gray Level | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Number of pixels | 200 | 300 | 500 | 350 | 250 | 0 | 0 | 0 |
10 M
3 (a)
A source emits 6 symbols with the following probabilities
Construct the Huffman code. Calculate the average code word length and coding efficiency
| Symbol | A | B | C | D | E | F |
| Probability | 0.1 | 0.2 | 0.05 | 0.05 | 0.35 | 0.25 |
Construct the Huffman code. Calculate the average code word length and coding efficiency
10 M
3 (b)
Perform region splitting and merging on the image segment shown below. Draw the quad tree. Briefly explain the method used.
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4 (a)
Calculate the Hadamard transform of the image segment,
\[\begin{matrix} f(x,y)= \end{matrix}\begin{bmatrix} 2 &3 &1 &4 \\2 &1 &1 &4 \\1 &3 &4 &4 \\3 &3 &2 &2 \end{bmatrix}\]
\[\begin{matrix} f(x,y)= \end{matrix}\begin{bmatrix} 2 &3 &1 &4 \\2 &1 &1 &4 \\1 &3 &4 &4 \\3 &3 &2 &2 \end{bmatrix}\]
5 M
4 (b)
State and prove any two properties of 2DDFT.
5 M
4 (c)
Obtain the 16 basis images of Hadamard transform.
10 M
5 (a)
Given the 8 x 8 image segment, perform erosion using the strumming element shown:
Structuring element :
| 1 | 0 | 0 | 0 | 0 | 0 | 0 |
1 |
| 1 | 1 | 0 | 0 | 0 | 0 | 1 | 1 |
| 1 | 1 | 1 | 0 | 0 | 1 | 1 | 1 |
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 1 | 1 | 1 | 0 | 0 | 1 | 1 | 1 |
| 1 | 1 | 0 | 0 | 0 | 0 | 1 | 1 |
| 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
Structuring element :
| 1 | 1 |
| 1 | 1 |
10 M
5 (b)
With the help of a neat block diagram, explain the working of the homomorphic
filter.
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6 (a)
What are chain codes? Obtain 4 connected and 8 connected chain codes for the boundary shown below:
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6 (b)
Explain in detail different types of data redundancies present in the digital images
10 M
Write short notes on any four of the following:
7 (a)
Opening and closing
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7 (b)
Colour models
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7 (c)
Finger print recognition
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7 (d)
Digital water marking
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7 (e)
Handwritten character recognition.
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