Digital Image Processing Questions and Answers
Q1.
What is the name of the filter that is used to turn the average value of a processed image zero?
Answer :
Notch filter
Q2.
A spatial domain filter of the corresponding filter in frequency domain can be obtained by applying which of the following operation(s) on filter in frequency domain?
Answer :
Inverse Fourier transform
Q3.
Which of the following is/are considered as type(s) of lowpass filters?
Answer :
1. Ideal
2. Butterworth
3. Gaussian
Q4.
In a filter, all the frequencies inside a circle of radius D0 are not attenuated while all frequencies outside circle are completely attenuated. The D0 is the specified nonnegative distance from origin of the Fourier transform. Which of the following filter(s) characterizes the same?
Answer :
Ideal filter
Q5.
A Butterworth filter of what order has no ringing?
Answer :
1
Q6.
A process that accentuate the contribution to enhancement made by high-frequency components, by multiplying the highpass filter by a constant and adding an offset to the highpass filter to prevent eliminating zero frequency term by filter is known as ______
Answer :
High frequency emphasis
Q7.
Which of the following image component is characterized by a slow spatial variation?
Answer :
Illumination component
Q8.
How is negative of an image obtained with intensity levels [0,L-1] with “r” and “s” being pixel values?
Answer :
s = L – 1 – r
Q9.
Highlighting a specific range of intensities of an image is called ________
Answer :
Intensity Slicing
Q10.
Which is the set, whose membership only can be true or false, in bi-values Boolean logic?
Answer :
Crisp set
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