11. Two filters of similar size are used for smoothing images having impulse noise. One is a median filter while the other is a linear spatial filter. Which would the blurring effect of both?
A. Median filter effects in considerably less blurring than the linear spatial filters
B. Median filter effects in considerably more blurring than the linear spatial filters
C. Both have the same blurring effect
D. All of the mentioned
12. An image contains noise having the appearance of black and white dots superimposed on the image. Which of the following noise(s) has the same appearance?
A. Salt-and-pepper noise
B. Gaussian noise
C. All of the mentioned
D. None of the mentioned
13. While performing the median filtering, suppose a 3*3 neighborhood has a value (10, 20, 20, 20, 15, 20, 20, 25, 100), then what is the median value to be given to the pixel under filter?
A. 15
B. 20
C. 100
D. 25
14. Which of the following are forced to the median intensity of the neighbors by the n*n median filter?
A. Isolated cluster of pixels that are light or dark in comparison to their neighbors
B. Isolated cluster of pixels whose area is less than one-half the filter area
C. All of the mentioned
D. None of the mentioned
15. Which filter(s) were used to find the brightest point in the image?
A. Median filter
B. Max filter
C. Mean filter
D. All of the mentioned
16. The median filter also represents which of the following ranked sets of numbers?
A. 100th percentile
B. 0th percentile
C. 50th percentile
D. None of the mentioned
17. Which of the following filter represents a 0th percentile set of numbers?
A. Max filter
B. Mean filter
C. Median filter
D. None of the mentioned
18. 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
19. 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
20. What is the name of the filter that multiplies two functions F(u, v) and H(u, v), where F has complex components too since is a Fourier transformed function of f(x, y), in an order that each component of H multiplies both real and complex part of the corresponding component in F?
A. Unsharp mask filter
B. High-boost filter
C. Zero-phase-shift-filter
D. None of the mentioned