181.  Which of the following is/are used as basic function in nonlinear filter for noise reduction? 
Answer: (b).Computation of median

182.  In neighborhood operation for spatial filtering if a square mask of size n*n is used it is restricted that the center of mask must be at a distance ≥ (n – 1)/2 pixels from border of image, what happens to the resultant image? 
Answer: (c).The resultant image will be a little smaller size than original image

183.  Which of the following method is/are used for padding the image? 
Answer: (c).All of the mentioned

184.  In neighborhood operation for spatial filtering using square mask of n*n, which of the following approach is/are used to obtain a perfectly filtered result irrespective of the size? 
Answer: (c).By ensuring that center of mask must be at a distance ≥ (n – 1)/2 pixels from border of image

185.  Which of the following fact(s) is/are true for the relationship between low frequency component of Fourier transform and the rate of change of gray levels? 
Answer: (c).All of the mentioned

186.  Which of the following fact(s) is/are true for the relationship between high frequency component of Fourier transform and the rate of change of gray levels? 
Answer: (b).Moving away from the origin of transform the higher frequencies corresponds to abrupt change in gray level

187.  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 Fourier transformed function of f(x, y), in an order that each component of H multiplies both real and complex part of corresponding component in F? 
Answer: (c).Zerophaseshiftfilter

188.  To set the average value of an image zero, which of the following term would be set 0 in the frequency domain and the inverse transformation is done, where F(u, v) is Fourier transformed function of f(x, y)? 
Answer: (a).F(0, 0)

189.  What is the name of the filter that is used to turn the average value of a processed image zero? 
Answer: (b).Notch filter

190.  Which of the following filter(s) attenuates high frequency while passing low frequencies of an image? 
Answer: (b).Lowpass filter
