1. In neighborhood operations working is being done with the value of the image pixel in the neighborhood and the corresponding value of a sub-image that has the same dimension as the neighborhood. The sub-image is referred as _________

A. Filter

B. Mask

C. Template

D. All of the mentioned

2. The response for linear spatial filtering is given by the relationship __________

A. Sum of filter coefficient’s product and corresponding image pixel under filter mask

B. Difference of filter coefficient’s product and corresponding image pixel under filter mask

C. Product of filter coefficient’s product and corresponding image pixel under filter mask

D. None of the mentioned

3. In linear spatial filtering, what is the pixel of the image under mask corresponding to the mask coefficient w (1, -1), assuming a 3*3 mask?

A. f (x, -y)

B. f (x + 1, y)

C. f (x, y – 1)

D. f (x + 1, y – 1)

4. Which of the following is/are a nonlinear operation?

A. Computation of variance

B. Computation of median

C. All of the mentioned

D. None of the mentioned

5. Which of the following is/are used as a basic function in a nonlinear filter for noise reduction?

A. Computation of variance

B. Computation of median

C. All of the mentioned

D. None of the mentioned

6. In neighborhood operation for spatial filtering if a square mask of size n*n is used it is restricted that the center of the mask must be at a distance ≥ (n – 1)/2 pixels from the border of the image, what happens to the resultant image?

A. The resultant image will be of the same size as the original image

B. The resultant image will be a little larger size than the original image

C. The resultant image will be a little smaller size than the original image

D. None of the mentioned

7. Which of the following method is/are used for padding the image?

A. Adding rows and columns of 0 or other constant gray levels

B. Simply replicating the rows or columns

C. All of the mentioned

D. None of the mentioned

8. In neighborhood operation for spatial filtering using a square mask of n*n, which of the following approach is/are used to obtain a perfectly filtered result irrespective of the size?

A. By padding the image

B. By filtering all the pixels only with the mask section that is fully contained in the image

C. By ensuring that the center of the mask must be at a distance ≥ (n – 1)/2 pixels from the border of the image

D. None of the mentioned

9. Which of the following fact(s) is/are true for the relationship between the low-frequency component of Fourier transform and the rate of change of gray levels?

A. Moving away from the origin of transform the low frequency corresponds to smooth gray level variation

B. Moving away from the origin of transformation the low frequencies correspond to an abrupt change in gray level

C. All of the mentioned

D. None of the mentioned

10. Which of the following fact(s) is/are true for the relationship between the high-frequency component of Fourier transform and the rate of change of gray levels?

A. Moving away from the origin of transform the high frequency corresponds to smooth gray level variation

B. Moving away from the origin of transformation the higher frequencies correspond to an abrupt change in gray level

C. All of the mentioned

D. None of the mentioned