Digital Image Processing Questions and Answers
Q1.
The feature(s) of a highpass filtered image is/are _______
Answer :
1. Have less gray-level variation in smooth areas
2. Emphasized transitional gray-level details
3. An overall sharper image
Q2.
Smoothing in frequency domain is achieved by attenuating which of the following component in the transform of a given image?
Answer :
Attenuating a range of high-frequency components
Q3.
Butterworth lowpass filter has a parameter, filter order, determining its functionality as very sharp or very smooth filter function or an intermediate filter function. If the parameter value is of lower order, the filter approaches to which of the following filter(s)?
Answer :
Gaussian lowpass filter
Q4.
State the statement true or false: “BLPF has sharp discontinuity and ILPF doesn’t, and so ILPF establishes a clear cutoff b/w passed and filtered frequencies”.
Answer :
False
Q5.
To accentuate the contribution to enhancement made by high-frequency components, which of the following method(s) should be more appropriate to apply?
Answer :
1. Multiply the highpass filter by a constant
2. Add an offset to the highpass filter to prevent eliminating zero frequency term by filter
Q6.
A class of system that achieves the separation of illumination and reflectance component of an image is termed as _______
Answer :
Homomorphic system
Q7.
If the contribution made by illumination component of image is decreased and the contribution of reflectance component is amplified, what will be the net result?
Answer :
1. Dynamic range compression
2. Contrast enhancement
Q8.
Which process expands the range of intensity levels in an image so that it spans the full intensity range of the display?
Answer :
Contrast sketching
Q9.
What is the set generated using infinite-value membership functions, called?
Answer :
Fuzzy set
Q10.
Which of the following is a type of Membership function?
Answer :
1. Triangular
2. Trapezoidal
3.Sigma
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