Coordinate Frames and Projection

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1. Which explanation matches describe points in camera and world coordinates?A. Intrinsics describe focal lengths, principal point, and often pixel-axis skew in the camera projection.B. Extrinsics describe the rotation and translation between a world frame and camera frame.C. Projection combines geometry and camera parameters; observed-versus-projected residuals reveal fit quality.D. A world point and a camera point live in different coordinate frames; a transform relates them.

2. Which explanation matches what camera intrinsics mean?A. A world point and a camera point live in different coordinate frames; a transform relates them.B. Extrinsics describe the rotation and translation between a world frame and camera frame.C. Intrinsics describe focal lengths, principal point, and often pixel-axis skew in the camera projection.D. Projection combines geometry and camera parameters; observed-versus-projected residuals reveal fit quality.

3. Which explanation matches move a camera with extrinsics?A. A world point and a camera point live in different coordinate frames; a transform relates them.B. Extrinsics describe the rotation and translation between a world frame and camera frame.C. Intrinsics describe focal lengths, principal point, and often pixel-axis skew in the camera projection.D. Projection combines geometry and camera parameters; observed-versus-projected residuals reveal fit quality.

4. For what camera intrinsics mean, which result or action fits this practical case: The same world point moves in the image after changing the lens.A. Compare two focal lengths while keeping the camera pose and world point fixed.B. Write the lot's painted corner in world meters and in image pixels with the frame named beside each.C. Transform a fixed painted corner into each camera's coordinate frame before projecting it.D. Check held-out corners near and far from the lens, not only points used to estimate parameters.

5. For check projection against image points, which result or action fits this practical case: A projected space corner misses its observed pixel by several pixels.A. Write the lot's painted corner in world meters and in image pixels with the frame named beside each.B. Compare two focal lengths while keeping the camera pose and world point fixed.C. Transform a fixed painted corner into each camera's coordinate frame before projecting it.D. Check held-out corners near and far from the lens, not only points used to estimate parameters.

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Coordinate Frames and Projection

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