Local Visual Features

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1. Which explanation matches why corners survive small view changes?A. A keypoint detector selects locations with measurable local structure.B. A corner has strong intensity variation in more than one direction and can be easier to relocate than a flat patch.C. A descriptor summarizes the local patch so candidate points can be compared.D. Scale- or rotation-aware detection and description can improve matching across such changes.

2. Which explanation matches detect useful keypoints?A. A keypoint detector selects locations with measurable local structure.B. A corner has strong intensity variation in more than one direction and can be easier to relocate than a flat patch.C. A descriptor summarizes the local patch so candidate points can be compared.D. Scale- or rotation-aware detection and description can improve matching across such changes.

3. Which explanation matches describe a patch for matching?A. A corner has strong intensity variation in more than one direction and can be easier to relocate than a flat patch.B. A keypoint detector selects locations with measurable local structure.C. Scale- or rotation-aware detection and description can improve matching across such changes.D. A descriptor summarizes the local patch so candidate points can be compared.

4. For detect useful keypoints, which result or action fits this practical case: Thousands of candidate points appear in one textured wall.A. Compare a corner with a plain wall under a small viewpoint change.B. Compare descriptors at the same physical corner and at a different but similar-looking corner.C. Keep points spread across the scene rather than clustered in one patterned area.D. Inspect how many useful correspondences survive before and after the viewpoint change.

5. For handle scale and rotation changes, which result or action fits this practical case: A camera approaches the door and rotates slightly.A. Compare a corner with a plain wall under a small viewpoint change.B. Inspect how many useful correspondences survive before and after the viewpoint change.C. Keep points spread across the scene rather than clustered in one patterned area.D. Compare descriptors at the same physical corner and at a different but similar-looking corner.

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Local Visual Features

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