Digital Image Processing Questions and Answers
Q1.
What is the basis for numerous spatial domain processing techniques?
Answer :
Histogram
Q2.
To reduce computation if one utilises non-overlapping regions, it usually produces ______ effect.
Answer :
Blocky
Q3.
The output of a smoothing, linear spatial filtering is a _______ of the pixels contained in the neighbourhood of the filter mask.
Answer :
Average
Q4.
The non linear spacial filters whose response is based on ordering of the pixels contained is called _____.
Answer :
Order-statistic filter
Q5.
Smoothing filter is used for which of the following work(s)?
Answer :
1. Blurring
2. Noise reduction
Q6.
A spatial averaging filter having all the coefficients equal is termed _____
Answer :
A box filter
Q7.
Two filters of similar size are used for smoothing image having impulse noise. One is median filter while the other is a linear spatial filter. Which would the blurring effect of both?
Answer :
Median filter effects in considerably less blurring than the linear spatial filters
Q8.
The median filter also represents which of the following ranked set of numbers?
Answer :
50th percentile
Q9.
Which of the following is/are used as basic function in nonlinear filter for noise reduction?
Answer :
Computation of median
Q10.
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 :
Moving away from the origin of transform the higher frequencies corresponds to abrupt change in gray level
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