NPTEL Digital Image Processing Week 7 Assignmet Answers 2024
1. Which of the following is TRUE, for power law transformation?
T (r) = crY
Where, c and y are positive constants and r is the input intensity
a) Y < 1=>Narrow range of dark input values is mapped into wider range of values and wide range of high intensity values is mapped into narrow range of values
b) Y > 1 =>Narrow range of dark input values is mapped into wider range of values and wide range of high intensity values is mapped into narrow range of values
c) Y < 1=>Narrow range of dark input values is mapped into narrow range of values and wide range of high intensity values is mapped into wider range of values
d) None of the above.
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2. Which process is used to correct the power-law response ?
a) Alpha Correction
b) Gamma correction
c) Luminance Correction
d) None of the above
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3. Process that increases the dynamic range of Grey levels in an image is called
a) Linear stretching
b) Contrast stretching
c) Contrast matching
d) All of these.
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4.
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5. For decoding a K L Transformed image at the receiver side, we require
a) Transformed image
b) Transformation matrix
c) Original Image
d) Both Transformed image and transformation matrix.
Answer :-
6.
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7.
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8.
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9.
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10. Which of the following is/are true for histogram equalization?
a) It is used to increase the dynamic range of intensities of an image.
b) It helps in contrast enhancement.
c) Transformation function must be a single valued and monotonically increasing function.
d) All of the above mentioned.
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