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Technical Details

  • Variable Type: Event
  • Data Type: Integer
  • Units: Frame number
  • Column Name: ball_release_event
  • Required for QA: False
  • Measurement: Estimated frame of ball toss release, marked by:
    • when the hand passes above the face, or
    • when the hand reaches its max upwards velocity before apex

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Description

Ball Release marks when the ball is released from the hand during the toss, estimated from hand motion. It separates the start of the preparation phase from the Release and Loading phases and is used for timing and Loading Phase Ball Release Angle metrics.

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Use Cases

  • Toss consistency and timing
  • Loading phase definition (ball release to low arm)
  • Ball release angle assessment