Digital Image Processing Questions and Answers
Q1.
In a dark image, the components of histogram are concentrated on which side of the grey scale?
Answer :
Low
Q2.
Histogram Equalisation is mainly used for ______
Answer :
Image enhancement
Q3.
In uniform PDF, the expansion of PDF is _________
Answer :
Probability Density Function
Q4.
Which term is used to indicate that pixels are multiplied by different coefficients?
Answer :
Weighted average
Q5.
Which of the following is best suited for salt-and-pepper noise elimination?
Answer :
Median filter
Q6.
At which of the following scenarios averaging filters is/are used?
Answer :
1. In the reduction of irrelevant details in an image
2. For smoothing of false contours
3. For noise reductions
Q7.
Is it true or false that “the original pixel value is included while computing the median using gray-levels in the neighborhood of the original pixel in median filter case”?
Answer :
True
Q8.
Which filter(s) used to find the brightest point in the image?
Answer :
Max filter
Q9.
Which of the following is/are a nonlinear operation?
Answer :
1. Computation of variance
2. Computation of median
Q10.
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 :
1. Moving away from the origin of transform the low frequency corresponds to smooth gray level variation
2. Moving away from the origin of transform the low frequencies corresponds to abrupt change in gray level
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