Digital Image Processing Questions and Answers
Q1.
Which of the following is not a valid response when we apply a second derivative?
Answer :
Nonzero response at onset of gray level step
Q2.
Which of the following derivatives produce a double response at step changes in gray level?
Answer :
Second order derivative
Q3.
Which of the facts(s) is/are true for the second order derivative of a digital function?
Answer :
Must be zero along the ramps of constant slope
Q4.
What kind of relation can be obtained between the response of first order derivative and second order derivative of an image having a transition into gray-level step from zero?
Answer :
Both first and second order derivative has the same response
Q5.
The requirements of the First Derivative of a digital function:
Answer :
1. Must be zero in areas of constant intensity
2. Must be non-zero at the onset of an intensity step
3. Must be non-zero along ramps
Q6.
Which of the following occurs in Unsharp Masking?
Answer :
1. Blurring original image
2. Adding a mask to original image
3. Subtracting blurred image from original
Q7.
What is the smallest possible value of a gradient image?
Answer :
0
Q8.
Final step of enhancement lies in ______ of the sharpened image.
Answer :
Increase dynamic range
Q9.
What is required to generate an M X N linear spatial filter?
Answer :
MN mask coefficients
Q10.
An example of a continuous function of two variables is _______
Answer :
Gaussian function
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