Calibration and Measurement

Five questions. Choose one answer for each, then submit to see your score and explanations.

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1. Which explanation matches capture useful calibration views?A. Useful calibration views cover the frame, different orientations, and enough sharp detectable corners.B. A distortion model maps ideal pinhole coordinates to the real lens's observed positions.C. Reprojection error measures discrepancy between observed calibration points and points predicted by the fitted model.D. A homography maps points on one plane between views, enabling a rectified pavement view.

2. Which explanation matches estimate distortion from a pattern?A. Useful calibration views cover the frame, different orientations, and enough sharp detectable corners.B. Reprojection error measures discrepancy between observed calibration points and points predicted by the fitted model.C. A homography maps points on one plane between views, enabling a rectified pavement view.D. A distortion model maps ideal pinhole coordinates to the real lens's observed positions.

3. Which explanation matches read reprojection error honestly?A. Useful calibration views cover the frame, different orientations, and enough sharp detectable corners.B. A distortion model maps ideal pinhole coordinates to the real lens's observed positions.C. Reprojection error measures discrepancy between observed calibration points and points predicted by the fitted model.D. A homography maps points on one plane between views, enabling a rectified pavement view.

4. For estimate distortion from a pattern, which result or action fits this practical case: Straight board lines bow near the edge of a wide lens.A. Capture some tilted views with the board near the edges of the image.B. Compare corner residuals before and after estimating radial distortion.C. Inspect per-image and per-region errors as well as the overall average.D. Use four or more well-spread point correspondences on the ground plane.

5. For measure a planar region with a homography, which result or action fits this practical case: Parking spaces on a flat pavement have different image shapes.A. Use four or more well-spread point correspondences on the ground plane.B. Capture some tilted views with the board near the edges of the image.C. Compare corner residuals before and after estimating radial distortion.D. Inspect per-image and per-region errors as well as the overall average.

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Calibration and Measurement

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