Snowboard Motion Library

Breaking down snowboard technique with AI and physics

A video goes in and four things come out: an overlay clip with the skeleton and live physics readouts, curves showing how each metric moves over time, a table with one row per turn, and a captured frame at peak inclination for every turn.

The video pipeline measures geometry and timing in the image plane. True edge angle and foot pressure cannot be recovered from video — those belong to the sensor version, and this library does not pretend otherwise.

Riders

Index

This article is only available in Chinese for now. The interface is translated; the prose is still on the way.

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2 人 · 156 条有效视频 · 1954 个弯。视频版口径 = 图像平面几何与时序(倾角/反弓/节奏/换刃速度);立刃角与足底压力属传感器版,不在本库。

滑手对比

滑手视频总弯数峰值倾角均值对称节奏波动反弓换刃速度最深屈膝
[[滑雪动作库/滑手/alex\ALEX]]76106949.5°65.4%60.1%12.5°199.4°/s90.7°
[[滑雪动作库/滑手/xuebao\雪宝]]8088539.8°62.8%70.5%10.4°136.1°/s103.0°

指标怎么读

  • 峰值倾角:每个弯体轴离铅垂线的最大角度,越大越激进(机位斜会偏小,同机位才可比)
  • 对称:左弯 vs 右弯峰值倾角之比 ×100,100 = 完全对称;低于 85 通常有明显弱侧
  • 节奏波动:弯时长的变异系数,越小节奏越稳,<20% 算稳定
  • 反弓:峰值处腿倾角与躯干倾角之差(+ = 躯干更立);换刃瞬间无定义
  • 换刃速度:入弯处倾角变化率(°/s),越大换刃越干脆
  • 最深屈膝:髋-膝-踝夹角最小值,180 = 直立

数据文件

  • 滑雪动作库/数据/baseline.csv — 每视频一行(Excel 直开)
  • 滑雪动作库/数据/turns_all.csv每个弯一行的完整数据集,量化分析用这个
  • 项目库(分析管线+原始视频):AIsnowboarding