NPTEL Digital Image Processing Week 12 Assignment Answers 2024

NPTEL Digital Image Processing Week 12 Assignment Answers 2024

1. Which of the following second order operator is most robust to noise in edge filtering?

a. Sobel operator
b. Laplacian operator
c. Prewitt operator
d. Laplacian of Gaussian operator

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2.

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3. In a given image strip (S), assuming necessary zero padding find second order derivative
S = 4 4 4 4 4 4 0 0 0 0

a) -4 0 0 0 0 -4 4 0 0 0
b) 4 0 0 0 0 4 -4 0 0 0
6) -4000044000
d) 4 0 0 0 0 4 4 0 0 0

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4.

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5. A point in cartsian space is represented in Hough space (slope intercept space) as_____________

a. Point
b. Straight line
c. Parabola
d. None of these

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6. Which of the following statements are true for Laplacian operator?

a) It can be used to find appropriate location of edge using zero crossings.
b) Sensitive to noise.
c) Both a and b
d) None of the above

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7. In a given image strip (S), assuming necessary zero padding find second order derivative
S = 2 4 8 10 8 4 2 0 0 0

а) 0 2 2 -4 -2 2 0 2 0 0
6) 0 2 -2 -4 -2 2 0 2 0 0
c) 0 2 -2 -4 2 2 0 2 0 0
d) 0 2 2 4 2 2 0 2 0 0

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8. Which of the following are major point of interest in discontinuity based segmentation algorithms?

a. Isolated points
b. Lines
c. Edges
d. All of the above

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9. The applications of segmentation is (are)_____________.

a. Detection of similar regions.
b. Detection of lines and edges in an image.
c. Both a and b.
d. None of the above mentioned.

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10. Which of the method is not related to region-based segmentation?

a. Thresholding
b. Merging and splitting
c. Region growing
d. Hough Transform

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