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Motion Segmentation in Forward Motion Video

Motion Segmentation in Forward Motion Video. Nick Hirsch: Progress Report. Overview of the Technique. Track Features (KLT). Compare Tracks to FoE Direction Field. Stabilize Tracks. Weed Out Stationary Tracks. Determine Direction of Tracked Points. Rate Remaining Tracks. Update FoE.

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Motion Segmentation in Forward Motion Video

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  1. Motion Segmentation in Forward Motion Video Nick Hirsch: Progress Report

  2. Overview of the Technique Track Features (KLT) Compare Tracks to FoE Direction Field Stabilize Tracks Weed Out Stationary Tracks Determine Direction of Tracked Points Rate Remaining Tracks Update FoE Cluster Tracks

  3. Recent Progress • Integrated SIFT code into codebase • Tested track quality with SIFT features as opposed to KLT features. • SIFT features produce slightly worse results, especially for pixels with little to no motion. • SIFT also takes too long to calculate. • Scrapped SIFT altogether • Returned to using KLT feature points for tracking • Fixed some errors with the mean shift code • Tweaked KLT code to reduce noise in the tracks.

  4. Reasons for canning SIFT • Tracks weren’t accurate enough for pixels off in the distance.

  5. KLT Provides More Accuracy Overall

  6. More Results

  7. Next Steps • Add registration code to remove global movements due to camera shake (robustify) • 75% complete • Current code accounts for translation of the projection plane, but not rotation • Works some of the time but not all the time • Add object tracking code to remember moving objects over time

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