Computer Vision Week 6 NPTEL Assignment Answers 2025
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✅ Subject: Computer Vision
📅 Week: 6
🎯 Session: NPTEL 2025 July-October
🔗 Course Link: Click Here
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NPTEL Computer Vision Week 6 Assignment Answers 2025
1.
Answer : See Answers
2.
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3. If an octave in SIFT operator has 12 images, then the scale factor by which each image in octave differs from the next image is (round off your answer to 4 places of decimal).
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4.
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5. SURF improves computational efficiency over SIFT by:
a) Replacing DoG with box-filter approximations.
b) Using integral images for Haar wavelet calculations.
c) Eliminating orientation assignment.
d) Reducing descriptor dimensionality to 64.
Answer : See Answers
6. Which of the following statements about the ORB feature descriptor are true?
a) It applies Laplacian of Gaussian (LoG) for detecting a key point.
b) Its feature descriptor encodes relative brightness of a set of pairs of pixel sites around the key point.
c) It is orientation invariant.
d) It is a binary string.
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7. Compute the magnitude using first order first difference operator at the center pixel. Round off your answer to 4 places of decimals.
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8. Compute the orientation (in degrees) using first order first difference operator at the center pixel.
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9. Compute the product of gradients along x and y axis.
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10. Which of the following feature descriptors involve detection of key points in an image.
a) SIFT
b) SURF
c) HOG
d) ORB
Answer : See Answers
