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Technical Details

  • Variable Type: Event
  • Data Type: Integer
  • Units: Frame number
  • Column Name: ball_release_frame
  • Required for QA: True
  • Measurement: Low hand event plus a fixed 3-frame offset, calibrated against ground-truth release timing

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Description

Release marks the estimated instant of ball release during the windmill delivery, computed as a small offset from the low hand event.

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Use Cases

  • Ball release timing analysis
  • Downstream release-based metrics (wrist height, trunk angles, arm slot)