Digital Image Processing Questions and Answers
Q1.
A pixel p at coordinates (x, y) has neighbors whose coordinates are given by:
(x+1, y+1), (x+1, y-1), (x-1, y+1), (x-1, y-1)
This set of pixels is called _____
Answer :
Diagonal neighbors
Q2.
For pixels p(x, y), q(s, t), and z(v, w), D is a distance function or metric if:
Answer :
1. D(p, q) ≥ 0
2. D(p, q) = D(q, p)
3. D(p, z) ≤ D(p, q) + D(q, z)
Q3.
Using gray-level transformation, the basic function Logarithmic deals with which of the following transformation?
Answer :
Log and inverse-log transformations
Q4.
Which of the following transformations is particularly well suited for enhancing an image with white and gray detail embedded in dark regions of the image, especially when there is more black area in the image.
Answer :
Negative transformations
Q5.
What is gamma correction?
Answer :
A process to correct power-law transformation response phenomena
Q6.
The transformation s = T(r) producing a gray level s for each pixel value r of input image. Then, if the T(r) is monotonically increasing in interval 0 ≤ r ≤ 1, what does it signifies?
Answer :
It is needed to restrict producing of some inverted gray levels in output
Q7.
If the histogram of same images, with different contrast, are different, then what is the relation between the histogram equalized images?
Answer :
They look visually very similar to one another
Q8.
What happens to the output image when global Histogram equalization method is applied on smooth and noisy area of an image?
Answer :
The contrast increases little bit with considerable enhancement of noise
Q9.
Which of the following logical operator(s) is/are functionally complete?
Answer :
1. AND
2. OR
3. NOT
Q10.
Two images having one pixel gray value 01010100 and 00000101 at the same location, are operated against AND operator. What would be the resultant pixel gray value at that location in the enhanced image?
Answer :
00000100
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