Digital Image Processing Questions and Answers
Q1.
Histograms are the basis for numerous spatial domain processing techniques.
Answer :
True
Q2.
What is Histogram Matching also called as?
Answer :
Histogram Specification
Q3.
Which type of Histogram Processing is suited for minute detailed enhancements?
Answer :
Local
Q4.
A spatial averaging filter in which all coefficients are equal is called _______.
Answer :
Box filter
Q5.
What does “eliminated” refer to in median filter?
Answer :
Force to median intensity of neighbours
Q6.
What is/are the resultant image of a smoothing filter?
Answer :
Image with reduced sharp transitions in gray levels
Q7.
Which of the following filter(s) has the response in which the central pixel value is replaced by value defined by ranking the pixel in the image encompassed by filter?
Answer :
1. Order-Statistic filters
2. Non-linear spatial filters
3. Median filter
Q8.
Which of the following are forced to the median intensity of the neighbors by n*n median filter?
Answer :
1. Isolated cluster of pixels that are light or dark in comparison to their neighbors
2. Isolated cluster of pixels whose area is less than one-half the filter area
Q9.
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?
Answer :
f (x + 1, y – 1)
Q10.
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 :
By ensuring that center of mask must be at a distance ≥ (n – 1)/2 pixels from border of image
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