Depth and Motion

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1. Which explanation matches convert stereo disparity to depth?A. For rectified stereo, depth is approximately focal length times baseline divided by disparity.B. Stereo matching assumes comparable visible appearance; reflections, blank surfaces, and occlusions break that assumption.C. Optical flow estimates apparent image motion, which can result from camera movement, object movement, or both.D. Estimate or compensate camera motion before interpreting residual object motion.

2. Which explanation matches check where stereo matching fails?A. For rectified stereo, depth is approximately focal length times baseline divided by disparity.B. Optical flow estimates apparent image motion, which can result from camera movement, object movement, or both.C. Estimate or compensate camera motion before interpreting residual object motion.D. Stereo matching assumes comparable visible appearance; reflections, blank surfaces, and occlusions break that assumption.

3. Which explanation matches interpret optical flow under camera motion?A. For rectified stereo, depth is approximately focal length times baseline divided by disparity.B. Stereo matching assumes comparable visible appearance; reflections, blank surfaces, and occlusions break that assumption.C. Optical flow estimates apparent image motion, which can result from camera movement, object movement, or both.D. Estimate or compensate camera motion before interpreting residual object motion.

4. For check where stereo matching fails, which result or action fits this practical case: A shiny car has different reflections in the two stereo views.A. At fixed focal length and baseline, a point with twice the disparity has roughly half the depth.B. Mask or flag low-confidence disparity near glare and object boundaries.C. Compare background flow with a moving person's flow before labeling the person as moving in world space.D. Use stationary background features to infer camera movement, then inspect the cyclist's remaining displacement.

5. For separate object motion from camera motion, which result or action fits this practical case: A cyclist moves while the robot camera rolls forward.A. Use stationary background features to infer camera movement, then inspect the cyclist's remaining displacement.B. At fixed focal length and baseline, a point with twice the disparity has roughly half the depth.C. Mask or flag low-confidence disparity near glare and object boundaries.D. Compare background flow with a moving person's flow before labeling the person as moving in world space.

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Depth and Motion

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