Which of the following statements is false regarding SIFT and SURF?
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SIFT and SURF are two most useful approaches to detect and match features
because they are invariant to scale, rotation, translation, illumination, and blur
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SURF is better than SIFT in rotation invariance, blur and warp transform
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SURF is 3 times faster than SIFT because of its use of integral image and box
filter
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descriptors with dimensions lower than 128 perform pretty well across a range
of matching tasks
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Identify the correct sequence of steps in a Canny edge detection pipeline. Steps listed below:
1. Compute gradient magnitude and direction
2. Connect individual components
3. Smoothen the image
4. Non-maximum suppression along the edge
5. Threshold into strong, weak or no edge
6. Non-maximum suppression perpendicular to the edge
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3→ 1→ 4→ 5 → 2
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3→ 5→ 1→ 4 → 2
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3→ 1→ 6→ 5 → 2
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3→ 1→ 5→ 6 → 2
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In RANSAC, what is the probability that the algorithm never selects a whole set of inliers from 20
data points (which has 5 inliers in total) for k = 2 time steps? Here, n = 2 is the minimum number of
samples to fit a model.
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0.2
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0.93
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0.87
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0
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Suppose we have a codebook of 2048 SIFT visual words. We extract 1000 SIFT descriptors (SIFT is a
128-dimensional feature) from a new image. What is the dimensionality of the BoW (Bag-of-Words)
descriptor?
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1000
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128
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128 × 2048
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2048
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In case of template matching by using correlation, even if template is not identical to some
subimage in the scene, match can be meaningful, if (a) _____________ , (b) _____________ and general
appearance is right.
Based on the above data, answer the given subquestions.
Enter the correct answer for Blank (a) ______________ .
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In case of template matching by using correlation, even if template is not identical to some
subimage in the scene, match can be meaningful, if (a) _____________ , (b) _____________ and general
appearance is right.
Based on the above data, answer the given subquestions.
Enter the correct answer for Blank (b) ______________ .
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The degrees of freedom for translation and affine transformations are (a) __________ and (b)
___________ respectively.
Based on the above data, answer the given subquestions.
Enter the correct answer for blank (a) __________.
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The degrees of freedom for translation and affine transformations are (a) __________ and (b)
___________ respectively.
Based on the above data, answer the given subquestions.
Enter the correct answer for blank (b) __________.
A published solution is not available for this question yet.