## NPTEL Digital Image Processing Week 6 Assignment Answers 2024

1.

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2.

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3. Which of the following transformations preserves the signal strength (magnitude) of the data

a) Discrete Walsh Transform (DWT)

b) Discrete Fourier Transform (DFT)

c) KL Transform

d) All of the above

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4. What is the time complexity of Fast Fourier Transform for an N -point Discrete Fourier Transform?

a) 0(N^{2})

b) 0(N Iog_{10} N)

c) 0(N log_{2 }N)

d) None of the above

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5.

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6.

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7. Considering the cost and complexity of hardware required, which of the following transforms is

generally preferred for real-time applications?

a) Fast Walsh/Hadamard transform

b) DCT

c) FFT

d) KL Transform

Answer :-

8. Which of the following transforms have exactly same basis images as that of walsh transform

(ignore the order of basis images)?

a. Hadamard Transform

b. KL transform

c. DCT

d. Ordered Hadamard Transform

Answer :-

9. Imagine you have powerful servers with significant processing capabilities. You’re looking for a transform that can squeeze the most information out of data while efficiently representing it with minimal loss. Which of the following transforms would be the best choice?

a) Fast Walsh/Hadamard transform

b) DCT

c) FFT

d) KL Transform

Answer :-

10. An application for compressing storage space of images uses CPU that has built it FPU – Floating

Point Unit (Hardware accelerated Sine, Cosine and exponentiation, floating numbers arithmetic, etc.) which of the following transform is better suited for this application?

a) Fast Walsh/Hadamard transform

b) DCT

c) FFT|

d) KL Transform

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