11. Which gray-level transformation increases the dynamic range of gray-level in the image?
A. Power-law transformations
B. Negative transformations
C. Contrast stretching
D. None of the mentioned
12. When is the contrast stretching transformation a linear function, for r and s as gray-value of an image before and after processing respectively?
A. r1 = s1 and r2 = s2
B. r1 = r2, s1 = 0 and s2 = L – 1, L is the max gray value allowed
C. r1 = 1 and r2 = 0
D. None of the mentioned
13. When is the contrast stretching transformation a thresholding function, for r and s as gray-value of an image before and after processing respectively?
A. r1 = s1 and r2 = s2
B. r1 = r2, s1 = 0 and s2 = L – 1, L is the max gray value allowed
C. r1 = 1 and r2 = 0
D. None of the mentioned
14. What condition prevents the intensity artifacts to be created while processing with contrast stretching, if r and s are gray values of the image before and after processing respectively?
A. r1 = s1 and r2 = s2
B. r1 = r2, s1 = 0 and s2 = L – 1, L is the max gray value allowed
C. r1 = 1 and r2 = 0
D. r1 ≤ r2 and s1 ≤ s2
15. A contrast stretching result has been obtained by setting (r1, s1) = (rmin, 0) and (r2, s2) = (rmax, L – 1), where, r and s are gray-values of the image before and after processing respectively, L is the max gray value allowed and rmax and rmin are maximum and minimum gray-values in image respectively. What should we term the transformation function if r1 = r2 = m, some mean gray-value.
A. Linear function
B. Thresholding function
C. Intermediate function
D. None of the mentioned
16. A specific range of gray-levels highlighting is the basic idea of __________
A. Contrast stretching
B. Bit –plane slicing
C. Thresholding
D. Gray-level slicing
17. What is/are the approach(s) of the gray-level slicing?
A. To give all gray levels of a specific range high value and a low value to all other gray levels
B. To brighten the pixel’s gray value of interest and preserve the background
C. All of the mentioned
D. None of the mentioned
18. Which of the following transform produces a binary image after processing?
A. Contrast stretching
B. Gray-level slicing
C. All of the mentioned
D. None of the mentioned
19. Specific bit contribution in the image highlighting is the basic idea of __________
A. Contrast stretching
B. Bit –plane slicing
C. Thresholding
D. Gray-level slicing
20. In bit-plane slicing if an image is represented by 8 bits and is composed of eight 1-bit planes, with plane 0 showing the least significant bit and plane 7 showing the most significant bit. Then, which plane(s) contain the majority of visually significant data.
A. Plane 4, 5, 6, 7
B. Plane 0, 1, 2, 3
C. Plane 0
D. Plane 2, 3, 4, 5